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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 05-23-08, 08:19 PM   #1
alaska
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jumping on carbon

i need a new fork and was looking at carbon options (specifically, a 1" threaded wound-up one) but i'm worried i might over abuse it. how sensitive are carbon forks really? who does jumps or other abusive tricks with carbon forks/wheels? i know people do, but should i avoid carbon if i intend on trying tricks where impact is a factor or will i be safe enough?
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Old 05-23-08, 08:22 PM   #2
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how about just leaving tricks for steel? seriously why spend that much on a fork just to abuse it? Get a simple $70 tange fork and then you won't have to worry.
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Old 05-23-08, 08:28 PM   #3
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I mean you can jump on carbon but realize it will break eventually with potentially disastrous consequences. If you do tricks inspect the fork before and after every ride. Seriously its important. A small crack can easily spell disaster
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Old 05-23-08, 08:32 PM   #4
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When you break the steel fork it will slowly bend, and crack. The carbon will shatter with out warning.
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Old 05-23-08, 08:35 PM   #5
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i understand carbon can fail without notice and that steel is always stronger. i'm not trying to get all bmx with it but i like hopping over manhole covers and off curbs, etc. i'm asking if carbon forks can take the abuse of more than just bumpy pavement.
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Old 05-23-08, 08:36 PM   #6
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I bet that a carbon fork could potentially be very strong, although I know very little about them. They make mountain bike frames out of carbon, so it must be able to be built pretty sturdily, no?
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Old 05-23-08, 08:38 PM   #7
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it can, but on a bike you know you're going to go tuff on, why not get parts that are tough to handle it well (ex: steel)?
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Old 05-23-08, 08:39 PM   #8
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Get a carbon MTB fork. It will withstand abuse much more than a road fork.
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Old 05-23-08, 08:41 PM   #9
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For tooling around, the risk is probably not worth the gain in decreased weight...

Just another thing to worry about.
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Old 05-23-08, 08:59 PM   #10
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who actually does tricks on carbon forks? pista concepts or something?

it's happening, i want to know how it holds up and how carefully one must ride with carbon.
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Old 05-23-08, 09:02 PM   #11
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Just don't mash into parking kerbs and it will survive.
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Old 05-23-08, 09:06 PM   #12
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to ride just for riding it's cool, but I wouldn't trust it under the impacts of constant tricking
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Old 05-23-08, 09:20 PM   #13
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who actually does tricks on carbon forks? pista concepts or something?

it's happening, i want to know how it holds up and how carefully one must ride with carbon.
That's not exactly a trick where the type of fork would make a god damn difference. find a more relevant picture
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Old 05-24-08, 01:40 AM   #14
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That's not exactly a trick where the type of fork would make a god damn difference. find a more relevant picture
i know that, but it's a clear shot of newman riding the fork i'm talking about. hell, he does a pretty big jump in the macaframa trailer with it. it's pretty obvious that their are people riding carbon in ways it wasn't intended. i'm wondering if anyone around here has an experience with carbon forks/wheels breaking on them or holding up very reliably, either way.

Last edited by alaska; 05-24-08 at 01:55 AM.
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Old 05-24-08, 03:31 AM   #15
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who actually does tricks on carbon forks? pista concepts or something?

it's happening, i want to know how it holds up and how carefully one must ride with carbon.
Im always hopping curbs on my Felt Carbon Airofoil fork. But now that i got a HED3 im a bit more wary.
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Old 05-24-08, 03:34 AM   #16
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why do you want carbon?

is it because it looks cool?

or do those extra grams let you catch more air?

Just so you understand, these guys do do all that crazy **** on track bikes is kinda stupid, as it stands, taking track bikes on the street is a big stretch from what there built for, but doing tricks on them is like taking your Lamborghini off roading (you should see the road gaps i can do in one.)

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Old 05-24-08, 06:13 AM   #17
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On second thought, it's a great idea:

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Old 05-24-08, 06:50 AM   #18
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I wouldn't be worried about hopping of curbs as much as I'd be worried about scraping the fork then hopping off curbs.

Take a look at your current fork; is it all scratch up? Would you trust a carbon fork that looked like that?
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Old 05-24-08, 09:45 AM   #19
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i know that, but it's a clear shot of newman riding the fork i'm talking about. hell, he does a pretty big jump in the macaframa trailer with it. it's pretty obvious that their are people riding carbon in ways it wasn't intended. i'm wondering if anyone around here has an experience with carbon forks/wheels breaking on them or holding up very reliably, either way.
If you're doing wheelies and dont land ridiculously hard on the front or other more simple tricks the fork will hold up. Jumping and other tricks is pushing it, in my opinion. I broke a Concept fork exactly like the dude on pink deep vs above by blindly hitting a curb very late at night. I don't think a fork will just spontaneously break like that from one too many wheelies.

I wish there were a BFSSFG materials engineer.
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Old 05-24-08, 10:31 AM   #20
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thanks peabody, that's kinda what i was thinking. i generally treat my bike as nicely as possible, but i like to use it to its fullest.

anybody else have experience?
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Old 05-24-08, 10:51 AM   #21
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If you're doing wheelies and dont land ridiculously hard on the front or other more simple tricks the fork will hold up. Jumping and other tricks is pushing it, in my opinion. I broke a Concept fork exactly like the dude on pink deep vs above by blindly hitting a curb very late at night. I don't think a fork will just spontaneously break like that from one too many wheelies.

I wish there were a BFSSFG materials engineer.
Check the Mechanics forum.

Roadies of course use carbon forks and they are great for that but for tricks, curb-hopping, etc. you need a fork you can rely on plus a good headset and some strong wheels. A steel fork isn't that much heavier and actually has way more street cred/hipster points than a carbon one for a fixed gear bike.

[off to replace headset on San Jose that won't stay tight].
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Old 05-24-08, 11:14 AM   #22
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They make cyclocross forks out of carbon.
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Old 05-24-08, 01:37 PM   #23
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They make cyclocross forks out of carbon.
They make hip huggers in size 42 as well. That don't mean Ms. Hungry Hungry Hippo has to wear them.
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Old 05-24-08, 01:40 PM   #24
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I have a nashbar carbon fork on one of my bikes. Though I don't do any tricks, per se, I'm not exactly easy on that bike either. I do sometimes have to hop over potholes and occasionally go off of curbs (the slow, one-wheel-at-a-time kind of way). For my purposes, the fork has held up well and I doubt that lighter impacts along the normal axis of force will damage the carbon. In some cases, like jumping over potholes, I would even guess that the downward force of the landing is much better than hitting the pothole straight on.
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Old 05-24-08, 07:18 PM   #25
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They make hip huggers in size 42 as well. That don't mean Ms. Hungry Hungry Hippo has to wear them.
It's pretty obvious I'm saying carbon forks can be strong. Don't be a jackass.
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