I can't imagine they'd last long,but I want somebody to volunteer to put them to a DH run or two.
Any guinea pigs that built up the cheap ,Chinese carbon rims?
- Thread starter SCARY
- Start date
Link to the rims in question?
I have repaired carbon rims that were namebrand. Unless they got some sort of special armoring rocks will kill them no matter what the brand.
I have repaired carbon rims that were namebrand. Unless they got some sort of special armoring rocks will kill them no matter what the brand.
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Thing is, a Stans flow rims is not meant to be for dh either, some parts are usable for dh applications by stretching their capabilities but if you think a flow rim will hold up to proper dh then the carbon one will probably do to as they are most likely pretty comparable. Personally i will not ride it for dh because in my eyes that is quite far outside its intended use.
There's still no carbon rims wide enough to give a DH tire a good profile and the only carbon rims I've seen marketed as DH are Enve and the upcoming Havocs. I'm waiting for cheap (<$200) wide Chinese rims.
are this rims wide enough?
http://www.light-bicycle.com/wider-mtb-26er-carbon-bike-rim-26-inch-rims.html
http://www.light-bicycle.com/wider-mtb-26er-carbon-bike-rim-26-inch-rims.html
Yeah,those are the rims I'm talking about.^^^
Ive been using 721s for all time,and think those are 21mm interior.I don't really get the wide rim thing,but I use higher pressure and like the profile of the tire.I combo,I would think,roll faster.
Ive been using 721s for all time,and think those are 21mm interior.I don't really get the wide rim thing,but I use higher pressure and like the profile of the tire.I combo,I would think,roll faster.
No, same width as Flows. 2.5" tires (2.7" Minions) are intended to be run on 26-29mm rims. I've run'em on narrower rims and the tires roll over easier and just don't grip as well. I love the Flows on my FR bike with Advantage 2.4" tires. My DH race wheels are Flows with 2.7" Minions and I'll swap rims as soon as a wider carbon is available.
moar grams = more dh?
People actually run 2.7 Minions?
I put one on once cuz the shop ordered the wrong size and it was unridable on the 721.It had NO traction in corners.2.5 works great.
I put one on once cuz the shop ordered the wrong size and it was unridable on the 721.It had NO traction in corners.2.5 works great.
Thats cuz you put it on too narrow a rim and gave it a crappy profile. 2.7" Minion = 2.5" every other brand so they're not "wide".
This is a carbon rim used for downhill (not mine). It took a huge rock hit that flatted the tyre, I repaired it. But still.. smashing rocks is pretty common on a DH bike.
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I believe they aren't ready yet, I've been following the thread on MTBR and they are further delayed I think they're going to be ready mid-June.
been riding an xc pair, no problems.
tubed or tubeless and what method if tubeless? tires?
tubed at the moment. maxxis advantage 2.1 front, high roller 2.1 rear. Will be going tubeless once i get around to it (sometime this summer),
I did that to 4 alloy rear rims on my DH bike last season. At least the carbon is reapairable but obviously not indestructable so I'm not gonna get the current $800+ offerings. $200 per rim with the promise of this happening less often than with alloy is worth it to me.
Are they going on your DH bike? If they last I might give them a shot over a new set of 823's.
Lets see some pics of them.
Also curious how true thye are out of the box.
Also curious how true thye are out of the box.
me or evil jn?
don't care really. Post up everything 
You're missing the point, you will still kill carbon rims by hitting them on rocks. Just as much as w/ an alloy rim. Carbon will just be much lighter/stiffer, but you will kill it just as easily.
You may be able to spread some epoxy on there, but once a carbon rim is cracked, it will never be as strong as before. There is no way to "re-attach" all the separate plies that were sheared, you can just fix what is on the surface.
You are spot on there. About the only thing that you can't really repair on a carbon rim that I have seen is nipple pull through. When they break give us a call
Hmmm, sorta right and wrong at the same time. I take a lot of the area surrounding the fracture away, both inside and outside the rim. With correct prep and a nice layup over and around the effected area I doubt you will ever get a repeat fracture there. Especially when you throw in some aramid as well. Just sticking epoxy over it isn't going to do anything beneficial.
So any horror stories yet? Has anyone attempted using these for DH yet? The thread on MTBR shows a few (rims) with possibly questionable quality control. Do you guys that have them reckon they are worth it?
I have just ordered some for my new Nimble 9. Won't have any long term feedback for a while. Can let you know how they build up and ride though...
I have a set on the trail bike but have only been out on them once so far. Seemed nice and stiff. Nothing revolutionary though.
I've got a set of heavier rims at 410g that were intended for the DH bike. Starting to have second thoughts as after a while off DH, I'd forgotten how hard it can be on wheels. That said I'm thinking a 410g carbon rim is probably comparable to a 470g alu flow rim...probably...
I've got a set of heavier rims at 410g that were intended for the DH bike. Starting to have second thoughts as after a while off DH, I'd forgotten how hard it can be on wheels. That said I'm thinking a 410g carbon rim is probably comparable to a 470g alu flow rim...probably...