Ask Pinkbike - DH Bikes, Bottom Brackets and Drivetrain Rumbles

Aug 19, 2014
by Pinkbike Staff  
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Here at Pinkbike we get inundated with all kinds of questions, ranging from the basic "Can I have stickers" to more in-depth, soul searching types of queries like if you should pop the question or what to name your first child. Ask Pinkbike is an occasional column where we'll be hand picking and answering questions that have been keeping readers up at night, although we'll likely steer clear of those last two and keep it more tech oriented.



DH Bike Dilemma

Question: Pinkbike user norcodher11 asked this question in the Downhill Forum: I'm looking to change bikes and have narrowed it down to either the Scott Gambler or the Specialized Demo 8. Do you have any comments about the positive and negative attributes of these two? I know there are a lot of Demos around, which must mean that they are good bikes, but the Gamblers look pretty interesting. Let me know what you think.


bigquotesTo be honest, there's not much between a lot of downhill bikes on the market, but the two that you're considering really are at opposite ends of the spectrum in terms of what they each excel at. Let's look at the Demo first: it's a nimble bike that is going to take less effort to ride and race on tracks that require a bit of pedalling or are less fall line in their layout, and it's a load of fun on smoother, jump filled trails that really allow its playful side to come out. Depending on the terrain, it's also one of the best cornering downhill bikes on the market, at least in my mind, thanks to its relatively short rear end and low bottom bracket height. If the Demo is the gazelle of downhill bikes, the Gambler has to be the lion. The Scott has a much larger presence on the trail, and while a solid rider is going to get it down any course in good time, it feels most at home on steep, chunky and fast terrain. It also sports adjustable geometry that allows you to tailor it to exactly those sorts of tracks, letting the rider slacken it out much more than what's possible with the Demo, and really feels at home on the gnarliest of trails. Where it doesn't excel, at least in my experience, is on tamer terrain that requires you to use some ponies to keep your momentum up. It's a serious bike that performs best on serious trails.

I'd recommend that you make an honest evaluation of where and how you ride before laying out cash for either. I'd tell a downhiller who rides and races on more average terrain to go with the Demo, but the Gambler may be more up your alley if the only pedalling that's required on your trails is the twenty feet from the truck to the trailhead, which really isn't how it usually is. Sometimes the gazelle is fastest, and sometimes it's the lion.
- Mike Levy

Scott Gambler 700 2015

The Gambler isn't the best bike for "flow trails" but it's certainly one of the most confidence inspiring on serious terrain.




One-By Drivetrain Rumble

Question: KEEPitSTUPID writes in the All-Mountain, Enduro & Cross-Country forum:A few months back, I changed my 3x10 to a 1x10 setup, with a Shimano XT clutch rear mech and a 32-tooth thick-thin chainring by Raceface, and it ran faultlessly. Then, a few weeks back, I began to get a rumble when pedaling backwards. No changes were made. I have since swapped out the chain and cassette with a KMC chain and a Shimano Deore XT cassette with the same ratio as before. Now, when I pedal hard I get a rumble - and I cannot see a problem with my drivetrain. Any clues would be appreciated.

bigquotesTake the chain off the front sprocket and spin the crank. If it spins smoothly, you can eliminate the possibility that you blew up your bottom bracket bearings. Next, view the rear derailleur from the back of the bike to see if it is visibly bent inwards. If not, the most probable reason for your rumble is that the rear derailleur's B-tension screw is not turned in enough to keep the upper derailleur pulley from running into the cogs. The B-tension screw contacts the hooked tooth of the frame-mounted derailleur hanger. Turning it in (clockwise) rocks the derailleur body away from the cassette sprockets.

Another problem that is specific to one-by transmissions is running the chain too short, which draws the lower cage pulley so far forward, that the angle the chain creates between the pulley and the chainring is greatly exaggerated when the transmission is shifted to the extreme ends of the cassette. This causes rumbling at the chainring as the links attempt to engage the sprocket teeth from an odd angle. The new chain and cassette may have tighter tolerances and thus would naturally make more noise. Check the B-tension screw first and then set your chain up as long as possible. Start by stringing it through the rear mech with the derailleur shifted into the smallest cog. Set the chain length so that the pulley cage just begins to angle downward - that's the longest that the chain should be.

Finally, you did not mention whether you were using a short, mid or long-cage rear mech. If you are using a mid or short-cage derailleur, it may not have enough chain takeup to cover your gear range, in addition to the amount of chain growth built into your rear suspension. A drivetrain with a perfectly tuned chain length on the bike stand may be pressed to the breaking point when the suspension is sagged or compressed while climbing. You may need to bump up to the next longer pulley cage if this is the case. - RC

Ask Pinkbike - drivetrain rumble

The B-tension screw (left) keeps the upper derailleur pulley from running into the cassette cogs, which is the cause of most rumbling drivetrains. KEEPitSTUPID's narrow-wide Raceface chainring is probably not causing the noise.





What type of bottom bracket do I have?

Question: thekwp2011 asked the following in the Beginners Forum: I want to order either a spider or direct mount ring form North Shore Billet for my SRAM X9 crankset. I need to specify if I have a BB30 or GXP BB. How can I tell which one I have?


bigquotesBottom bracket 'standards' can be confusing, since the number of different options continues to grow. If your cranks are already removed, the easiest way to tell what you have is by measuring the spindle diameter. As the name suggests, a BB30 or PF30 crank will have a 30mm spindle diameter, while a GXP crank's spindle will measure 24mm with a 22mm splined portion on the end. If you look at your bike, the bearings for a BB30 setup are typically found inside the frame, while the bearings for a GXP would be housed externally in cups that thread into the frame. Another way to find out without doing any measuring or crank removal is to go to your bike manufacturer's website - there should be a section where all of the frame specs, including bottom bracket type are listed. - Mike Kazimer

2013 Specialized Carbon Demo BB assembly

The bearing for a PF30 bottom bracket are housed inside the frame, as opposed to being housed in external cups that are threaded in.




Have some unresolved tech questions? Jump in the Pinkbike Forum and we'll look to answer it for next time.


85 Comments

  • 104 0
 Bottom brackets are one of those areas where I wish every manufacturer would agree on one standard, and stick with it.
  • 17 2
 I would also be nice if I could afford Scott but life is tuff haha
  • 163 3
 And that standard should be an external cup threaded style
  • 29 0
 ^and BSA threaded, just for clarification incase Shimano or Sram try to invent some new-fangled press-fit external cup monstrosity.
  • 8 2
 Yea, the bike manufacturers could even test out their new ideas for BB standards to see if they work before putting them into production? Then, for example, if they were considering using press fit BBs on their new frames, they would find out that they last around 200km before needing to be replaced and then they might reconsider putting them into their frames. Maybe? OH, I forgot, the bike industry are all about making bikes more affordable at the moment, so I guess R&D budgets must be tight...
  • 6 0
 It will be interesting to see how many props are given to @Enduro27 and @ka-brap's statements. I wonder how many it would take before manufacturers woke up and took this seriously.

Of course I also wonder when I will win my state's lottery. Unfortunately, I have never "played" the lottery but I suspect that both events are just about as likely.
  • 2 0
 And headset too
  • 10 1
 sorry barkit i accidentaly neg propped your comment. IMO press fit bb is one of the worst and most offensive changes to bikes ive ever seen. lets take something that is easy to work on (threaded bb) and essentially flawless in its design and make something that requires you to beat on your bike with a hammer. ( for those of us that cant afford spending money on more special tools). Also press fit bb, from what ive seen, can creak like hell and often they dont last as long nor are they re-install friendly. I can understand if cheaper models came with press fit but when someone buys a 6,000 dollar bike with a press fit its just and insult to the cycling community.
  • 10 5
 Even if EVERY registered pinkbike member of all time (including all the scammers suspended from the site) voted the same way people have commented so far, that's less than 1% of actual bicycle consumers the majority of whom don't care as they're happy with whatever their bike came with. A year ago there was a wheelsize poll that saw maybe 10k total votes and while the most votes went to the 26ers for life option, pretty much every brand that hadn't gone to 650B already has now done so, which goes to show you how much brands actually listen to people here (ie, not at all).
  • 9 0
 So sick of replacing my drive side PF30 bearing every month on a 2014 bike.
  • 3 1
 Pick a bottom bracket standard and be a dick about it.
  • 3 0
 @racerfacer that would be funny if people weren't unanimously against press-fit...
  • 2 6
flag deeeight Plus (Aug 21, 2014 at 0:05) (Below Threshold)
 @cragus... except people aren't unanimously against it. Again don't let whiners on this site who have time to complain fool you into thinking that there is any sort of majority against it, because the developers of these bikes are riders, and they're not against it, nor are their customers, nor are the vast majority of high end road bike customers, or bmx customers, or jump bike customers... all areas where non-threaded cup bottom brackets are the norm, not the exception. Pinkbike users speak for no one in the industry except themselves, because the industry honchos long ago came to the conclusion that this isn't the place for mature discussions, its the place for showing off eye candy or commenting on stuff as if its just there for the user to fantasize about.

For examples of that ridiculous behavior by pinkbike members, i suggest you start following the posts of Amanda Batty, as a female DH racer she gets all the immature sexist abuse this site is known for.

www.pinkbike.com/u/ambatt
  • 4 1
 ok so pros arnt against press fit bbs? and how many pros have to make a bike last 3-5 years? how many pros work on their own rigs with the possibility that if i break it i buy it ( new part or frame). Literally try your absolute hardest to fabricate a single benefit to a press fit bb other than manufacturing cost. please please try...
  • 1 4
 The benefit was explained in another article quite nicely a few days ago... perhaps if you did more than just read people's comments you'd be better informed.

www.pinkbike.com/news/first-look-rocky-mountains-carbon-thunderbolt-msl.html
  • 4 1
 are you really gonna believe that crap that the manufactures want you to? its cheaper. thats the only reason. why would aluminum bikes come as press fit then? i am a mechanic and i personally have never seen a ruined or even a significantly damaged bb threads due to over tightening. meanwhile i see creaking press fit bbs and crunchy bearings almost daily.
  • 4 1
 I bought a new carbon stumpjumper in April 2013 with press fit BB. In under 18 months I have been through 8 or 9 BBs. I have also had to send the frame back to spesh twice now because the BBs have seized and started spinning in the frame and worn the carbon away. It's been re-appoxyed both times to make it a tight fit again. This is my first bike with a press fit BB, and until now I have never had a problem with the old screw-in external BBs. The guys in the bike shop tell me that they're all experiencing the same problems that I am.
@deeeight - I don't know if you work in the bike industry and get given a lot of gear so you either don't ride the same bike for long enough to see these problems, or you don't care if it breaks because you didn't pay for it, or maybe you just don't ride that hard, but I KNOW from experience that these new press fit BBs suck.
  • 1 2
 Thats not the fault of press fit bottom brackets per say, that's a problem with the construction of your particular frame. If you have to epoxy the thing into the frame then the tolerances were pretty shoddy. I have a first-gen Salsa Spearfish, it uses the PFBB30 shell standard and my bottom bracket has had ZERO issues in two years of riding.
  • 1 2
 @tdryan242.... being a bike mechanic doesn't mean you know anything about mechanical engineering though... outside of bicycles, basically no industry uses threaded cups to hold bearings into a structural assembly, and for that matter, those threaded in cups are in the majority of cases putting bearings under pressure to hold them inside the cups... and done improperly they'll creak and fail also. Case in point the whole fiasco with ISIS bottom brackets.
  • 1 0
 There does seem to be something wrong with he construction of the frame in this case, but the frame has failed twice in the time that the BB bearings have failed 8 or 9 times (I've now lost count). There have been 6 or 7 times when the frame has been fine but the bearings alone failed. And the frame is only failing because the BBs are seizing in the first place. You can tell me over and over that there is no problem with the design of this press fit system, I will never buy another frame with it and looking at the way the different comments on this thread have been propped, I know I can't be alone.
  • 1 2
 Well a frame with missalignment / shoddy construction tolerances, which is itself failing would also be prone to causing parts assembled into it to repeatedly fail also. A frame with for example a miss-alignment in the dropouts where the hanger cants inwards slightly (even with new derailleur hangers, if the part of the frame it attaches to is out of whack, then you're pretty pickled) will always be miss-shifting and also prone to putting the chain into the spokes.

As to the way comments are propped on pinkbike... never mistake immaturity with knowledge. Bike designers long ago gave up taking this site's member opinions seriously because the vast majority who bother to complain about something don't represent anything but the whacko fringe of the sport.
  • 1 0
 You spend a lot of time commenting on and reading these comments for someone with so much contempt for them. I really don't see how the frame could be out of alignment - I have no problems with my shifting and you would hope that if spesh had gone to the trouble of re-appoxing the BB, they would make sure it's done straight.
  • 2 2
 I have contempt for ignoramuses, idiots, and morons of which this site plays host to many.

Frames usually don't "get" out of alignment during usage without a crash being involved but they often come that way brand new out of the shipping box. The epoxy specialized's dealer used to re-install the BB was a bandaid solution to avoid having to warranty the frame.
  • 3 0
 @deeeight the developers of these bikes may be riders, but their paychecks are inflated by every 'revolutionary' innovation they churn out and the sales they generate; be it press-fit bbs, funny-sized axles, and to a lesser extent needless changes in wheel diameters. all of this bollocks = marketing. be elitist and brand me an ignoramus if it makes you feel better but i think you're naive.
  • 1 4
 The site is full of conspiracy theorists and cynics... 25 years ago mountain bikers didn't fuss about new developments or innovations, now its all people have time to do it seems. Of course what do I know I've only mountain biked for almost twice your age, and have seen practically every bottom bracket interface ever tried.
  • 4 0
 @deeeight first of all, dont play the 'ive been biking since before you were born, child' card, it just makes you look like a twat. secondly, mountain bikers these days dont fuss about new innovations, not when they're actually innovative. i didnt see anyone moan about recent developments which are actually useful like carbon rims for dh or clutch derailleurs.
  • 1 3
 I'll play it when its appropriate.. and when you're carrying on like someone's who has seen things when you clearly haven't, its appropriate.
  • 3 0
 When Race Face was pushing hard for the ISIS standard and Shimano wouldn't play along, we all thought Shimano were being dicks and greedy and not wanting to play fair. That is, until they unveiled why they didn't want to go along with the ISIS standard- the BSA threaded outboard bearing BB. Then we all forgot about ISIS and were really impressed with the innovation Shimano brought to the market. We don't hate new, innovative things. We hate change for the sake of change, moreover change that brings about a poorer product.

deeight, do you work in a shop? If not, then you clearly have no idea about how many customers are actually affected by this. It really sucks. What the bike industry is doing is obviously saving tons of money on a cheaper BB construction and weighing this against how many come back for repair and/or claimed as a warranty. When this design was first pioneered in the road bike industry, it worked pretty ok because it's obviously a different type of riding with less abuse on the products involved. Now that this design has been brought to the mountain bike world, it really sucks. And personally, I am avoiding buying frames that come with press fit. It simply has no advantage for the end user and is far less reliable than the BSA threaded external BB.
  • 3 0
 @deeeight what does that even mean? i may not have seen some of the older standards when they were introduced but that doesn't nullify my point about press-fit. being a c*nt about someone's age and experience is not going to make people believe the shit you're spouting.
  • 2 0
 It's worth noting that dee8 has some knee (bone?) problems and can't really pedal; he's never going to know the frustration and disappointment of a consistently failing BB under a pair of strong (average) legs.
  • 1 0
 Really Scott and you're basis for that "note" is what? Its damn well not anything factual.
  • 1 0
 I apologize if i'm mis-remembering, but i'm nearly positive i remember reading you had a leg problem that forces you in to high cadence pedaling and CB/frog pedals. Is that incorrect?
  • 1 0
 nope not me, for starters I have the proper tools to service / install / remove all the BBs in all my bikes and right now I have bikes employing six different shell/interface methods.... second I despise CB pedals and don't like frogs either and wouldn't ride either. Other than using Bebops on my road/cross bikes all my bikes are SPDs (or clones). Third and finally... if I bought a frame that was so glaringly defective as to be needing epoxy to hold a press fit cup into the frame, I'd have the dealer force the brand to warranty it (as that's what warranties are really for...defects in materials and workmanship).
  • 2 0
 Good one Deeeight. You win. And you're not a cunt.
  • 1 0
 but i kinda like having to look for the right bb, headsets, etc......
  • 24 0
 I must say that I really do appreciate these 'Ask Pinkbike' articles. Even though I'm hardly concerned by the questions most of the time I learn intersting stuff/tips.
  • 15 0
 The 'Drivetrain Rumble' could also be from the freehub body. It may need a service (if possible) or replacing.
  • 4 0
 I've had bearings go in the freehub/axle that exhibited similar stuff.. skipping chain/funny noises etc.
  • 19 11
 Large number of demos doesn`t mean they are good frames. Specialized are a big brand and their advertising is pretty good, unlike some smaller brands. Also most people who ride Demo, don`t like progressive frames, demo is quite linear frame and most serious racers don`t like it. There are brands like: Mondraker, Zerode and many others that are better, but not so popular.



Sorry for the bad english Smile
  • 5 1
 Another reason why you see a lot of Demos around is because of their great EP/shop cost. A lot of guys who work for shops buy them because they are a good deal. I had a Demo in 2012 and hated it. My previous riding history was...going way back.. '97, GT LTS, 2 GT Lobos, GT DHi, prototype Orange 22X, 2 Iron Horse Sundays then the Demo 8. On tight smooth tracks, the bike cornered well, but open up the throttle and make the course a bit rough and I felt as though it cornered like crap. The front center felt too long for that short rear end and it literally had to be tip toed through rough corners. The pedaling was nowhere close to an IH Sunday or even an Orange. It really felt like the bike blew through the travel and I tried every shock on the market. I'm on a Trek Session now and couldn't be happier. I'd give the Gambler a look, there are more options to set it up how you want.
  • 2 0
 Also not that they are not popular but are built manufactured in limited numbers and not as easy to get in some countries fwiw!

Specialised and Giant are global brands with big import distribution capabilities the Evil empire wins!

I ride a Mondraker Summun the best DH bike ever by a long margin, Ive ridden Giants and Demos, It kicks arse, do like the Gambler though, not ridden one in battle, I would have thought the 27.5" model would be a better match against the 26" Demo in pedalling department.

The newer Demo 27.5 lefty sided frame looks like a pure racer, so Levys above comments may not be as big a factor if comparing the new model, also I think if you're honest with your ability for less skilled riders the bigger bike while maybe less flickable sprightly on smoother trails will help you on improving speed stability and safety riding DH rather than being out of control riding stuff slowly that puts others as well as themselves at risk, something I see quite allot these days on DH tracks and bike parks, not everyone is an expert in fact most are not, just not honest in they're abilities.

I didn't think the Demo pedalled all that well, my DHR and V10 and Mondraker way superior incl the Giant in that too. Its not bad just not better, does corner nice, better than the Giant and the V10c imo/e but not as nice as a DHR and esp not the Mondraker which is the best cornering DH bike Ive ever thrown a leg over by a long margin.

Just my added 2c
  • 18 0
 Pretty sure that was at least 4 cents Maverick
  • 3 0
 I actually find that my 2014 Gambler is very playful. I've got it set to the short rear end and low bb, thing corners awesome as long as you don't let the front end get away from you. I find the the suspension has this nice platform in the middle and it pumps and jumps off of just about everything. I used to own an SX trail and my big fear with going to a full DH bike was losing the playfulness but the Gambler hasn't disappointed me.
  • 4 2
 The Drivetrain Rumble can also come from a worn out front chain ring, this is apparent when power is being put through the pedals, a chain suck like action can be seen as the chain catches on the chain ring and bobs slightly between the chain ring and the read derailleur.
  • 7 2
 Definitely not, because narrow-wide chainrings are perfect and never wear out. If they did wear out you'd expect their chain retention functionality to also begin to diminish since you are relying on friction to keep the chain on - and we all know that friction doesn't lead to wear....
  • 8 2
 I heard chainrings made in Colorado never wear out because they're pressed out of powdered unicorn horns and self lubricate with virgin blood and fairy tears.

All chainrings will wear out eventually. I'll take replacing a narrow/wide chainring every 1000 miles over having to deal with constantly broken chain guide parts if it means I get a smooth, drop-free drivetrain.
  • 3 0
 I was more-so making the point that it seems odd to dismiss the chainring as the possible culprit since the OP swapped his cassette and chain, but the problem persisted. Not sure how you found out about our secret chainring manufacturing process though - we must have a mole.
  • 1 0
 Who is we? You can't outrun the Illuminati!

Honestly though, my XX1 drivetrain started making that noise about 1000 miles in. I checked the B-tension screw and then replaced the front chainring: problem solved.
  • 2 0
 Richard gave the good advice here. Make sure your drivetrain is set-up right before you start to randomly change parts.
  • 2 0
 Chainrings definitely wear out, more so ones you use ALL the time. All the narrow-wide rings made thus far are aluminum which isn't exactly the best choice for a part seeing concentrated loading, especially not in the smaller sizes typically run with 1x drivetrains.
  • 1 0
 I don't think the op is gonna wear out a chain ring in a few months. If so, good on op.
  • 1 0
 Depends on the ring size and actual riding habits, anyone who's serious into trail riding could legitimately put a couple thousand kms of riding in in a couple months. If the chain and cassette were changed and the rumble persisted, unless its ONLY in the largest cogs (where the position of the upper pulley would matter most) then the likely culprit is the chainring.
  • 2 0
 In my opinion, you(no pro) just need at most 4 gears for downhill racing! a gearbox has so many advantages... Why are there so less gearboxes for downhill bikes? and why don't the big companies offer the two alternatives,derailleur gears or gearbox?
  • 2 0
 @KEEPitSTUPID After I read about the drivetrain rumble, I thought, "Man, that really sucks! I wonder what it is?" And not one week later, the same thing started to happen to me. I knew the chain was the right length. All bearings are good, bottom bracket and rear hub. B-tension was fine (and the rumble would happen in higher gears as well). I adjusted the rear derailleur and still nothing helped. And then, it happened. My chain broke. After I repaired the chain (keeping it the same original length), the rumble was gone. So, it looks like, in my situation, the problem was a bent or stiff link. So, (especially at high cadences) though it's just one chain link, as it passes trough the pulleys, cassette and front ring, it rumbles (and skips now and then.) Not sure if that's your situation, but it couldn't hurt to check the chain.
  • 1 0
 Thanks man but my problem was only when pedelling back, chain and cassette were dying, changed out both and now does under load Frown not good man, using a kmc chain on raceface ring and xt cassette
  • 2 0
 CURRENT DRIVES SHOULD BE SEALED?
vimeo.com/80191950
But problem is that until frame manufacturers are not under thumb of gearing companies forget it being easily available
  • 1 0
 I think the chain length could be it pinkbike gods! Thanks! I would never have questioned my chain length, because of how many chains i have fitted, but this was my first clutch mech-ed chain install. I run a long cage clutched mech with a 32 up front and a 10 speed wide ratio cassette 36-11. Anyone got a new chain? Shiiit
  • 5 1
 If Brendogs like it should be fun!
  • 4 9
flag proDHracer (Aug 19, 2014 at 12:55) (Below Threshold)
 jajajaja lucas eres gayyy vuelve ya de los alpes maricaaa
  • 12 0
 "lol lucas gayyy're already back from the alps maricaaa"?
  • 10 0
 haha lucas is gay, valve yahoo apples america*
  • 21 0
 Cocaine is a helluva drug.
  • 4 1
 Choklat tastes gud.
  • 2 0
 after much hard work i think i've managed to translate that comment: Yeah lucas and turns you into a gay alps fag.
  • 4 1
 "Funny, Lucas was gay while in the alps of America" nailed it
  • 2 0
 haha Lucas you are gayyy. come back from the alps already, fag.
  • 3 3
 "I'd tell a downhiller who rides and races on more average terrain to go with the Demo, but the Gambler may be more up your alley if the only pedalling that's required on your trails is the twenty feet from the truck to the trailhead"

I think that scott pedals 300000000 times better than a demo
  • 1 0
 Race face, hope, wplftooth, absolute black, one up.. Soo many single ring available. Which one is the best in chain retention department?
Do you guys have some opinion about that?
  • 1 0
 Drivetrain rumble could also be worn ring - it gets heavy use on 1x drivetrains and due to the tall teeth are really sensitive to wear.
  • 1 0
 Pink bike should do a brief summary of every downhill bike! Sometimes the reviews don't summarise quite as nicely as the above info
  • 1 0
 GXP PF Bottom brackets are also internal bearings like a BB30 are they not?
  • 1 0
 Correct. Systems like BB92 use pressed in bearings but utilize 24mm spindle cranks.

To the OP, the best way to know which DM ring or Spider to order is to measure your spindle. If you have a 24mm spindle you should order the GXP model. If you have a 30mm spindle, you may STILL need the "GXP" model - you'll know which version to get by measuring the spacer found on the non-drive side of your spindle. If that spacer is ~15mm, you'll still likely need the GXP model. If it is ~9mm, the BB30 model will suit you better.
  • 2 2
 One-By rumble is easily caused by your front ring not being perfectly circular... You can feel this even more on single speed bikes.
  • 1 0
 How about downhill suspension design which works the best for most every downhill terrain
  • 2 1
 no that porDhRACER THAT IS IN CRAK!.....
  • 1 0
 What is the best one by drivetrain I can buy
  • 2 0
 The most expensive one of course! (don't listen to me, I'm drunk)
  • 3 0
 Shimano zee derailleur and shifter, raceface turbine cranks w/ direct mount chainring, and xt cassette with one up 40t. Or sram x9 instead of zee, if that tickles your fancy
  • 1 0
 why so many BB types!!???
  • 1 1
 Where can I find a derailuer hanger for a 2010 Giant Faith?
  • 1 0
 north shore billet or wheels manufacturing
  • 1 0
 Nope i just checked their website, they dont have it
  • 5 0
 Have you tried the obvious? Check with a Giant dealer.
  • 1 2
 Demo hatters!!! shame your bike doesnt look like a Specialized...

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