Maintenance
The Supreme DH is a pretty easy bike to live with. There are buckets of tire clearance and it generally sheds mud pretty well when conditions are into peanut butter territory.
There are however a few areas to keep an eye on, those aforementioned bearings on show being one and the pivot between the rear triangle and links also being in the firing line and a bit open to the elements.
But chief of all is the positioning of the links in the way of the shock bolt. While a ball ended hex tool helps, it’s a shock bolt and so needs a fair bit of torque which doesn’t lend itself well to the ball end style. This is a common problem on the Supremes with the tell-tale mark on the linkages. I am nitpicking, but it is a pain to have to either compress or remove one end of the shock to tighten the bolts.
While weight is an important factor in making a great bike, so too is durability, and the Supreme DH definitely had more of a ride hard and put away dirty feel to it, and I wasn't forever checking bolts or maintaining it after riding. Yes, it’s carrying a bit more timber than the other bikes but it does make up for it with a steadfast reliable feel to it.
The Supreme DH is a pretty easy bike to live with. There are buckets of tire clearance and it generally sheds mud pretty well when conditions are into peanut butter territory.
There are however a few areas to keep an eye on, those aforementioned bearings on show being one and the pivot between the rear triangle and links also being in the firing line and a bit open to the elements.
But chief of all is the positioning of the links in the way of the shock bolt. While a ball ended hex tool helps, it’s a shock bolt and so needs a fair bit of torque which doesn’t lend itself well to the ball end style. This is a common problem on the Supremes with the tell-tale mark on the linkages. I am nitpicking, but it is a pain to have to either compress or remove one end of the shock to tighten the bolts.
While weight is an important factor in making a great bike, so too is durability, and the Supreme DH definitely had more of a ride hard and put away dirty feel to it, and I wasn't forever checking bolts or maintaining it after riding. Yes, it’s carrying a bit more timber than the other bikes but it does make up for it with a steadfast reliable feel to it.
Honestly anything under 18 is nice. And too lite ends up being less stable and more prone to being blown off line in the air. Mass is sometimes your friend
Or maybe the fact that “plastic” (it’s not plastic, by the way) is every bit as viable a manufacturing material as brittle aluminum causes cognitive dissonance, so they have to double down on their original misconception. Doesn’t matter how many times Danny Macaskill can ride down a staircase on a bare carbon rim, or how many times Santa Cruz can drop weights on their frame or whack it against a curb. Cant be as strong as aluminum.
I’m not saying carbon stuff doesn’t break. I’m just saying the preconceptions of it being weak, brittle plastic is way off. It’s every bit as viable a material as aluminum with some real advantages.
Carbon frames are decent value for money. It's a difficult thing to make in many parts, a lot of bearings have to be in alignment. It has to hold the bottom bracket and wheel. It has to have the correct tolerance to hold the headset cups and seat post. A lot of work goes into frames. Rims on the other hand are an absolute rip-off in my opinion. A hoop of carbon. It must be the easiest thing to lay up and form. I would love to know the markup on a set of carbon rims and wheels. People can talk about R&D cost but I'm not buying it. On a frame fair enough, there are a lot of variables, but a rim is a hoop of material in which 50% of the dimensions are set before any of the designing even happens. Its a single shape of set diameter It has holes drilled into it the same as an alloy rim (they don't even bother to form the spoke holes anymore). Spokes are exactly the same as they have been for at least 30 years and they still cost about the same. A hub is two metal tubes with two bearings and maybe a freewheel. No one's reinventing the wheel. Total rip-off. It's no wonder everyone is selling carbon wheels. It's a licence to print money.
They are not, and will never be worth 2k a set.
No cognitive dissonance I know of (see what I did there). Have 2 bikes w/ AXS, and carbon everything on the XC bike, even raced carbon BMX bikes in vet, but the trail/enduro rig is running 471's not cause money, but cause risking a broken rim from an experimental line in the middle of nowhere means a 2-3hour hike back to the car (or a DNF in a race I dropped $500+ to attend for the weekend).
Strength all depends on the mfg process, design, and environment.
Its definitely more likely to be ocean garbage than alloy, which can be recycled (not that it always is).
Then your paying 2-5x the price of an alloy equivalent, but whats the ROI?
The other absolute pearler is that if you over tighten bolts on a carbon bar it snaps!! If carbon was stronger it should not matter if you over tighten bolts! It's ridiculous
Woke up feeling really sad that it wasn't true
I could be tempted to for a top spec Transition Spur though.
You get what you pay for.
And I know because I have a wife who rides with me. It's super cool, but I am sure I would never convince her to buy a bike I want. She finds 90% of good bikes ugly
It partially describes my last GF when we met, but not as of when we broke up. She might like good looking things, but definitely knows the value of a quality bike (or mostly snowboard for her now), she still rides the bike I bought her (I got tired of her borrowing my bike).
Two of my female friends are pro level MTB racers. Yeah, they look good, but the gear is top notch.
I have plenty of other examples.
It doesn’t matter that most of us won’t buy one. It’s just like watching Top Gear, we don’t watch it for the reviews of cars we will buy we watch it for the reviews of cars we wish we could buy.
Last year I made you a wish and, even though you promised me to fulfill it, you still have not, so I come here to beg you again. Could you please include videos in the bike reviews? And I do not mean videos showing shiny parts or the staffs pretty faces. I mean videos showing the action, the bike being ridden through gaps, drops, berms, jumps. And, if possible, not in slo-mo. It does not need to be an overly edited video, but at least show us something. The DH week is almost over and we have not seen an bike being tested going down the hill.
It would be so cool to see people (Mikes, Dan and others) we hear from pretty much everyday showing their skills and riding the bikes I won't be able to buy in a close future (just like Top Gear, my friend).
Sincerely yours,
PB, please buy your reviewers stop watches for God‘s (and the love of our sport) sake!
Also, I always assumed the travel was off because I've rode 200mm plenty of times and it never felt as cush as this and I am riding the 29/29. The HPP is definitely a factor, but still, it feels like so much more.
Stack off by 6 mm, reach by 10 mm, HA by 1,3 degree. That's quite a bit more than normal production tolerances (assuming the 3D scan is withing say +1 1 mm accuracy). Furthermore, the change in stack and reach cannot be explained by "just setting up the HA jig a bit too slack."
I assume you contacted Commencal about this? What was their reaction?
Cheers, Lars
That still leaves ~.5deg of head angle slackening unaccounted for. +/-.5deg is a not unheard of for alloy tolerances but also isn't amazing. I am wondering if there is a little bit of number fudging going on in the geo chart with the mullet conversion. In most cases even bikes that have flip chip adjustments for mullet mode would end up with about a half a degree of HA/STA slackening in the mullet config after correcting the BB drop.
As an aside measuring BB drop from horizontal front axle makes no sense. BB drop on a mullet should either be horizontal from rear axle (which is much closer to your feet), or distance from the wheel center line.
Glad it was slacker than rated since I didn't have to buy a custom headset from works.
Dude, I OWN a supreme sx that's claimed to have a 65* HTA. I put an angle finder on the stanchions and it's 63* with the same 180mm lyrik as the factory model.
I couldn't care less about the scanning company as I have nothing to do with it.
Are you absolutely certain that sag recommendation isn't supposed to read 17-23mm. This would work out at bang on 25-30% sag which is a hell of a conicidence, that being the industry standard recommended range. Also means their suggested compression and rebound settings would work a lot better by the sounds of it.
Also, 25 - 30% of a 75mm stroke shock is 18.8 - 22.5mm.
Thanks very much! There's a couple more articles coming too.
Could you also take measurements of actual geometry numbers of other (non-DH) bikes in future?
Or it can be done only at specific locations?
"static chainstay length of 457mm, and I say static as at sag our bike grew to 475mm and then at bottom out to 525mm"
"The Supreme DH is actually the least progressive bike that we tested, with a leverage ratio progression amount of 19%"
Truly, though, with a well set up coil these bikes are butter over the gnar and landings off everything I'm willing to huck are just too easy to believe. You trade a bit of playfulness for stability and confidence but it eliminates any excuse for "not enough bike"
For a super fast wide open run, I would choose the Demo--it just has a super stable feeling to it, like a monster truck. It feels incredibly planted in a high speed corner, but somewhat sluggish in a slower speed, technical sections. I think the Supreme has a more lively and flickable feeling about it--the bike just feels more active somehow, to me (I suppose that's the high pivot feeling?) Basically, if I had to choose ONE, it would be the Supreme. I had more fun on that bike in my short time on it.
Cheers for the review!
"all as a sticker on the frame right next to the shock"
€5,399 Commencal Supreme
€7,999 Specialized Demo
Most DH bikes will suck at it and the only ones I've ever truly loved did that surprisingly well. Those 2 bikes were an Iron Horse Sunday and the last gen Turner DHR.
I've been wanting to try a 29/27 DH setup for a while but didn't want to run the bike in a shorter setting to make that happen.
This to me seems the best of both worlds - The smaller rear wheel with cut a tighter line in a corner if you want it too but the long Geo will preserve many of the stability benefits of the full 29 setup.
Plus with the super rearward axle path I'm sure you won't get any of the 'smaller wheel meets square edge bump hang up' that more conventional suspension designs can have in mullet mode.
I can't wait to ride one
Totally underwhelmed by its performance (times showed that too being significantly slower). Might have been setup differences between my bikes and the Commy.
Big thanks for the very detailed Review. I hope there is more coming soon from you
Any chance to give an insight of the commencal furious? Maybe you´ve ridden it? I really would like to read some tests of the more affordable (and not race orientied) bunch of downhillbikes.
I´m keen to know, if the furious suspension-layout is really "poppy" and "bike-park-suited" or if that´s some claim due to a not so well working suspension platform.
...maybe there are some riders out there, that already ridden the commencal furious 2020/2021...
Is the recommended sag really 23%
Why not 30-33 like a normal dh bike?
If the reach of the medium is a bit more to your liking then maybe that’s the one to go for. There’s also the ability to adjust the reach with an offset headset. The 56mm diameter head tube is a pretty standard size with there being a few options of reach adjust headset available.
It’s so hard to find any information and reviews of that bike
But their bikes are damn sexy, so I would be willing to let that slide.
"but there’s an air of ride hard and put away dirty to it, and it does all this for a chuck of cash cheaper"
What?
It can't be that difficult.
Maybe we get a "DH Bike Month" some day.
They're just trying to review a higher percentage of bikes that matter to a higher percentage of people.
but i agree there would be a benifit from a tire size between 27.5 and 29" the split between them would be a 603mm bsd rim, 19mm smaller than 29"
www.sheldonbrown.com/rim-sizing.html
There's 609mm, 599mm and 597mm which aren't far off your idea.
If i’m not mistaken those sizes are antiquated though.
Better to just make a couple rim and tire molds at 603mm