Converting from bmx

PB Forum :: Dirt Jumping & Street
Converting from bmx
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flag cmc4130
Posted: May 14, 2015 at 10:56 Quote
travis-ridesbikes wrote:
when you say not a 24 specific bike does that mean i can put 26 inch wheels on it because that could be cool and i don't really care to be trendy. i would rather get something used because even if i buy a new bike i will end up replacing stuff.
and is it possible to just run a 26 inch sus fork on a 24

In the DJ mtb world, there actually is no such thing as a 24" suspension fork. (Okay, well there is . . . like on youth mtb's and a few rare forks like the Marzocchi D-Street 24" from the mid 2000's...) Everyone who is running 24"s is running a 24" front wheel in a 26" fork. You can see the extra one inch gap between the tire and the fork bridge.

With 24"-specific Dj-mtb's though, (like a Black Market Contraband 24", Union Street Molly Maguire, or NS Capital 24) the rear triangle of the bike is designed around a 24" wheel. They can make the chainstays shorter. Also, the bottom bracket tends to be higher relative to the axle level with a 24"-specific mtb.

In contrast, when you put 24"s on a 26", you're dropping your feet an inch closer to the ground (it'll be easier to pedal-strike the ground--at least in theory.... if a 26" mtb had 12" bb height, then 24"s will drop it to 11". 20" BMX bikes have 11.75" bb height.... so in that sense your pedals will feel lower to the ground).

Replacing a wheelset can easily be $300-$500, so if you already know you want 26"s, then buying the Haro with 24"s is a bad idea.

http://www.outsideoutfitters.com/p-29703-ns-bikes-enigma-26-wheels.aspx?variantID=97869&gclid=CJajl-rmwcUCFRCnaQod9GMACA
flag cmc4130
Posted: May 14, 2015 at 11:27 Quote
travis-ridesbikes wrote:
So I've finally started to really start looking theres only one 24 inch on cl in my area https://sandiego.craigslist.org/csd/bik/5014286657.html. Is this good or not and its cheap so if it needs some money put into it i can do that or this https://sandiego.craigslist.org/nsd/bik/4986069814.html theres a specialized p2 in my area also ive seen a couple in the buy sell on here that look nice im limited to around 600 bucks can that get me something good enough to not snap

This specialized P2 would be better/newer than the Specialized you posted here.

2010 specialized P2 - $300
http://santabarbara.craigslist.org/bik/5009960036.html

Maybe this one, but it looks like it may have some random parts....
http://inlandempire.craigslist.org/bik/5018813317.html

This would be sweet, if you can swing 550:
black market riot/chris king hub - $550 (dana point)
http://orangecounty.craigslist.org/bik/4977057035.html
flag ricar
Posted: May 14, 2015 at 11:52 Quote
I'm not sure about 26s on that particular model, but some frames were capable of running both rim sizes. Haro has been around too long to suck. Like Mongoose they make "good" bikes and "department store" bikes. It is possible for a company to do both but invariably the name gets associated with department store quality and they lose favor among the cool kids.

There is to my knowledge only one 24" specific fork and it was a tank. Pretty much all 24" specific bikes run a 26" fork.
flag cmc4130
Posted: May 14, 2015 at 12:53 Quote
ricar wrote:
I'm not sure about 26s on that particular model, but some frames were capable of running both rim sizes. Haro has been around too long to suck. Like Mongoose they make "good" bikes and "department store" bikes. It is possible for a company to do both but invariably the name gets associated with department store quality and they lose favor among the cool kids.
.



https://sandiego.craigslist.org/csd/bik/5014286657.html

It looks like a Haro Thread. Maybe the 2007 Haro Thread 1. Like here:
http://www.bicyclebluebook.com/searchlistingdetail.aspx?id=3029746

The wheels (Atomlab 24"s) are aftermarket. I don't think there were any 24"-specific Haro Threads....
flag travis-ridesbikes
Posted: May 14, 2015 at 15:45 Quote
cmc4130 wrote:
travis-ridesbikes wrote:
So I've finally started to really start looking theres only one 24 inch on cl in my area https://sandiego.craigslist.org/csd/bik/5014286657.html. Is this good or not and its cheap so if it needs some money put into it i can do that or this https://sandiego.craigslist.org/nsd/bik/4986069814.html theres a specialized p2 in my area also ive seen a couple in the buy sell on here that look nice im limited to around 600 bucks can that get me something good enough to not snap

This specialized P2 would be better/newer than the Specialized you posted here.

2010 specialized P2 - $300
http://santabarbara.craigslist.org/bik/5009960036.html

Maybe this one, but it looks like it may have some random parts....
http://inlandempire.craigslist.org/bik/5018813317.html

This would be sweet, if you can swing 550:
black market riot/chris king hub - $550 (dana point)
http://orangecounty.craigslist.org/bik/4977057035.html

i really like the p2 it looks like a nice place to start its not to close but it might be possible to get it the price is great the other one looks really random and i could probobly come up with 550 but it would take a while
flag ricar
Posted: May 14, 2015 at 16:03 Quote
The P2 needs the bar pulled back but other than that looks good. The Riot looks decent as well, but I would hope any Blk Mrkt would look at least half way decent.
flag travis-ridesbikes
Posted: May 14, 2015 at 17:56 Quote
The p1 looks nice little bit mismatched but its cromo so thats good
flag cmc4130
Posted: May 14, 2015 at 18:52 Quote
ricar wrote:
The P2 needs the bar pulled back but other than that looks good. The Riot looks decent as well, but I would hope any Blk Mrkt would look at least half way decent.

Yep. Agree.

And by the way, I think that guy is wrong--the P2 is not 2010. It's more like a 2007. Note the slight curve of the downtube up by the head tube. They didn't do that in the chromoly 2010 P2.

See . . . . it looks more like this one:
http://www.ridemonkey.com/threads/p2-cromo-steeze.178716/
flag cmc4130
Posted: May 14, 2015 at 19:30 Quote
travis-ridesbikes wrote:
The p1 looks nice little bit mismatched but its cromo so thats good

As long as the fork is not blown out, then it's a good deal. But if the fork is F'd, then it's not a good deal at all, because you'd spend $350-ish to get a new DJ suspension fork.
flag ricar
Posted: May 14, 2015 at 19:41 Quote
Thus the problem with MTB style bikes. IMO what is the point in running an MTB style frame with a rigid fork? Why not ride a cruiser and have the room where you need it (between the handle bar and top tube not between the wheel and down tube) IF you want Sus, then absolutely... but then the fork is half the cost of the bike and also a part quite susceptible to damage. Is it ever a good idea to buy a used sus fork if you don't know personally, and ride with the previous owner?
flag cmc4130
Posted: May 14, 2015 at 19:59 Quote
ricar wrote:
Thus the problem with MTB style bikes. IMO what is the point in running an MTB style frame with a rigid fork? Why not ride a cruiser and have the room where you need it (between the handle bar and top tube not between the wheel and down tube) IF you want Sus, then absolutely... but then the fork is half the cost of the bike and also a part quite susceptible to damage. Is it ever a good idea to buy a used sus fork if you don't know personally, and ride with the previous owner?

Great point. But, sometimes I think you can tell when the previous owner barely rode the bike. Especially if he/she was a crossover from xc or a commuter-ish mtb dude, then you can feel pretty sure the fork is fine.

As far as MTB with rigid vs. going 24" BMX . . . I hear you, I am definitely in both worlds. But, at the same time, I can respect the different worlds' distinctions. There's still a pretty big difference in handling between a 69/70/71 degree head angle mtb-street/DJ/park and a 74.5 head angle BMX 24". The bb height also feels totally different. So, if someone wants to ride all-rigid mtb-street (especially TRIALS-street blend like Danny Mac, then more power to 'em!!) Frankly, I think mainstream BMX media has been pretty shitty about promoting 24" street/park/trails bikes. Jim C made it happen almost singlehandedly, and it still did not take off in a big way. You still don't see any team riders for major street/park/trails bmx companies riding 24". And 26" BMX bikes tend to be oriented towards dad cruisers--NO ONE in BMX is actually riding them for park/street/trails or racing--even though they could. So, it's like if a rider wants to excel on 24" or 26"s . . . as between the two "scenes," they might as well go the mtb way (and I say that as a former die-hard bmx'er).
flag ricar
Posted: May 15, 2015 at 3:53 Quote
Absolutely. If you look at racing there was never any skill distinction in the cruiser class. If you were a novice and went to a national race you would be on the gate next to a fully sponsored rider and get destroyed, not much motivation to race nationals. I think that may have finally changed. Still you had cruiser guys through the years, hence the Kos cruiser, Kenny "Mayday" May, now Jim C. 24" wheels did have a good go, Norco did put out the 125 with 24s but they got branded as cheating or something.

Still, you are still right about the companies lagging, the MTB world has been more receptive to the larger wheels not needing to mean larger frame. You have small companies like Liquid making awesome cruiser frames but not completes, even guys like me who are so frustrated they make their own frames. Admittedly Tonic had the Fall Guy YEARS ago but it was built around a sus fork, they did not have a cruiser frame.

BMX companies build stuff like the old Widow Maker that are up sized BMX bikes but not everyone wants that, people also want small tight frames with the smoothness of the larger wheels. What do I know...
flag travis-ridesbikes
Posted: May 15, 2015 at 8:16 Quote
would a sus fork on a giant rincon work on a dirt jumper because if it wound im not worried about a blown out fork
flag cmc4130
Posted: May 15, 2015 at 9:29 Quote
travis-ridesbikes wrote:
would a sus fork on a giant rincon work on a dirt jumper because if it wound im not worried about a blown out fork

The fork will fit, but I wouldn't recommend using a recreational/cross-country fork for dirt jumping. There's the strength aspect, but there's also the handling--some xc forks are designed to be mushy and soak up trail bumps. A DJ fork is supposed to take bigger hits yet still be responsive off a jump, not just sag/mush into it. Sometimes you can fix that issue with adjustments like rebound or adding more air, but some forks just have mushy coil springs and just sort of suck for jumping.

If you did end up with a DJ bike with a broken fork, and you're on a budget, you can get a high quality rigid fork for like $125-ish.
flag ricar
Posted: May 15, 2015 at 16:11 Quote
Blowing the valves is not the problem, snapping it is the problem. You don't want a fork with steerer/ crown issues. Blown valves is the least of worries when it comes to trusting a fork.

 


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