Anyone running $178 chinese carbon rims for DH yet? light-bicycle.com
- Thread starter thad
- Start date
so the choices are 12k, 3k and UD, these do not affect strength?
no just cosmetic...
armchair engineer questions:
wouldn't a totally stiff rim be less forgiving on impact and thus more prone to crack on impact?
also, wouldn't a noodly wheel be a result of the build, spoke tension, or even tires than the rim itself?
i guess a whole 50g per wheel might have a slight effect on acceleration, but would carry momentum once going?
Not trying to be a dick, just pondering...
wouldn't a totally stiff rim be less forgiving on impact and thus more prone to crack on impact?
also, wouldn't a noodly wheel be a result of the build, spoke tension, or even tires than the rim itself?
i guess a whole 50g per wheel might have a slight effect on acceleration, but would carry momentum once going?
Not trying to be a dick, just pondering...
well not really.......I am simplifying this because i could go into a really long theory about composites but quite frankly i have real work to do!
In theory your outermost layer carries the most load. So if you put a weave there you are effectively using half the fiber ratio in the correct orientation. However i have observed when using the same layup and just tossing a layer of cloth ( no shit adding more layers helps) on the outside for cosmetic reasons, that impact values go up significantly.
They are compression molding the hook less part of the rim so smashing another layer in there will not optimize the fiber resin ratio. I went with the UD just for this reason, I assumed they did there homework, but after receiving the rims and how mine failed, they just tossed carbon at it and hoped it worked.
I highly doubt LB optimized there layups, based on my layup analysis of how my rim cracked and the propagation of the crack. There layup schedule was suspect in the area that mine broke, looks like they even forgot a ply or 2. If they really are using t700 with a toughened resin they are using some of the best commercially available fibers for the job they are picking.
Some words on carbon rims from Dirt. They even show our beloved cheap Chinese rims 
http://dirtmountainbike.com/features/carbon-mtb-wheels-do-you-need-them.html
http://dirtmountainbike.com/features/carbon-mtb-wheels-do-you-need-them.html
Was just about to post that..Some words on carbon rims from Dirt. They even show our beloved cheap Chinese rims
http://dirtmountainbike.com/features/carbon-mtb-wheels-do-you-need-them.html
this fucking guy, acts like hes someone who knows something. Go back to picking up dog poop buddy.
yo bro, have you seen this?
Thats why their rims are 800$ less than enve's
When I asked about the weave they said all the layups were the same and the choice in weave was just for the last visual layer...
I know what you're saying but I'm pretty sure you are just picking what weave they are going to slap in the mold first..
yea, homie asked if its helps strength and i just wanted to break it down a bit, because it CAN help, just not here.
srsly neg rep? What the fuck, its not like im bradflynn or anything.... piss off
Im sorry I just thought this was yet another I know everything about making everything thread.
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yeah, this is big boy talk. you can go back to your pictures now.
You deliver knowledge in the big boy talk about as well as you deliver podium finishes.
i race on the internet where all the tough guys are.
do you even bro, bro?
do you even bro, bro?
yeah, thats what i thought, tough guy.
what do you know about being tough you fucking hobbit?
since you seem all hot and bothered by it, maybe you should cool off and go hibernate you bear.
theres only enough room in this cave for one, unless you want me to slide inside you.
There is no kind of wrong love. You should know this since you can't live near schools.
And how dare you judge me.
Your lucky you're far away otherwise there would be a lot of lost hair
Of course you'd keep it you creep. I told you I can quit you and did
jesus, when did you turn into such a rag?
If what he posted is incorrect, feel free to deliver knowledge.
Thanks for being magnanimously dense. Roger and I had fun. Turned a stupid thread about knock-off shit into something entertaining.jesus, when did you turn into such a rag?
If what he posted is incorrect, feel free to deliver knowledge.
If you havent, you should sign up for MTBR. I think you'll get along fantastically there. Also roger cant podium, its against his religion.
emptybeer...the fount from which all useful mountain bike information springs forth...
we did it for you. obviously
Moderator, clean up all that man-love
you have 29 posts, bit early to be demanding stuff. You dont get to do that until you've given dirty a mouth hug trailside.
So in that Dirt video... that Box guy says that he's on the 3rd season on the same set of rims, so that's saved him 6 wheel builds. That leads me to ask... don't the spokes also fatigue in a carbon rim?
A couple of rides ago, for the first time ever, I had spoke failure at the j-bend. This was the first time I've "worn out" a wheel rather than killing it by denting or otherwise wrecking the rim. I was cranking up a hill, and as I crested, I heard a ping, and the spoke shot up through my yellow tape and I got a flat. The wheel was built in the fall of 2012, King hubs to Flow EX, brass nips and Sapim double butted spokes. I figured the rim had a good life, and since I had a new Spank Oozy 295 sitting around, had that built up.
My point is, the guy says that the carbon rims are a value since you save on wheel builds, but wouldn't you have to replace spokes and nips anyways, just as a result of material fatigue?
A couple of rides ago, for the first time ever, I had spoke failure at the j-bend. This was the first time I've "worn out" a wheel rather than killing it by denting or otherwise wrecking the rim. I was cranking up a hill, and as I crested, I heard a ping, and the spoke shot up through my yellow tape and I got a flat. The wheel was built in the fall of 2012, King hubs to Flow EX, brass nips and Sapim double butted spokes. I figured the rim had a good life, and since I had a new Spank Oozy 295 sitting around, had that built up.
My point is, the guy says that the carbon rims are a value since you save on wheel builds, but wouldn't you have to replace spokes and nips anyways, just as a result of material fatigue?
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