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Full Carbon Forks? Are they strong enough?

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Full Carbon Forks? Are they strong enough?

Old 10-26-06, 10:24 AM
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Full Carbon Forks? Are they strong enough?

I'm contemplating moving over to a Carbon Fork. Are they really that strong to support 200+ lb. riders? I know they're different types of Carbon Fiber but the fork I'm looking at is made of Full Carbon Monocoque. Let me know what you guys think. Thanks.
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Old 10-26-06, 10:43 AM
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no problem in my experience however if you're still in doubt check with the manufacturer
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Old 10-26-06, 10:54 AM
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Some CF people will say they're fine. I (who just bent a seat post) wouldn't trust something that can snap. Having bent a fork once I'm really glad that it didn't snap.
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Old 10-26-06, 11:41 AM
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You really have to check on carbon forks; they vary a lot. I just bought an all carbon so I did some checking.

Weight Limits for ALL carbon forks:
Easton EC90 SL & SLX - No limit per Easton (the one I plan to buy next)
Flyte CR3 - 280 lbs (the one I have now)
Alpha Q GS series - 225 lbs
Alpha Q CS series - unknown
Alpha Q SUB 3 - 200 lbs
Reynolds Ouzo Pro - 200 lb limit for 1" steerer, 210 for 1 1/8" steerer
Ritchey - never responded
Aerus - never responded
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Old 10-26-06, 02:49 PM
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I'm 230 lbs and I rode one of the first generation Cannondale Slice CF forks for 8 yrs with not even a hint of an incident.

If you're talking one of these newer forks that has a carbon steerer I'd be a little more cautious. I won't ride one.

If you do decide to buy a full CF fork, make sure it isn't a low-end cheapie. Losing all of your front teeth on the asphalt is not worth it.
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Old 10-26-06, 04:08 PM
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Originally Posted by v1k1ng1001
I'm 230 lbs and I rode one of the first generation Cannondale Slice CF forks for 8 yrs with not even a hint of an incident.

If you're talking one of these newer forks that has a carbon steerer I'd be a little more cautious. I won't ride one.

If you do decide to buy a full CF fork, make sure it isn't a low-end cheapie. Losing all of your front teeth on the asphalt is not worth it.
Actually I'm upgrading my Orbea's existing fork (Carbon/Alum molded) to their Zeus Full Carbon Monocoque fork which is on their Orca.
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Old 10-26-06, 04:09 PM
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I rode a Winwood carbon cyclocross fork for a good while. No problems. I'm 275#. I also rode an Easton carbon-fiber road bike fork for a good while. No problems there either. I was 290# then!
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Old 10-27-06, 04:21 AM
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I ride with them (220) with no problems, if your worried why not get one made for a cyclocross bike, they are beefier.
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Old 10-27-06, 08:33 AM
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I started riding this year with an Easton SL, I was 290 pound. Then by the time I got to 280 I got another bike and it had an XRP Carbon fork. I have had no troubles with either fork although I am now 225 and shrinking.
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Old 10-27-06, 08:38 AM
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Originally Posted by Mhendricks
I'm contemplating moving over to a Carbon Fork. Are they really that strong to support 200+ lb. riders? I know they're different types of Carbon Fiber but the fork I'm looking at is made of Full Carbon Monocoque. Let me know what you guys think. Thanks.
My bike is full carbon (lugged) with a carbon fork. No problems at all with the fork or any other part of it. I weigh 295 lbs.
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Old 10-27-06, 12:21 PM
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Originally Posted by gear
I ride with them (220) with no problems, if your worried why not get one made for a cyclocross bike, they are beefier.
The useless cantilever brake bosses might be a downer. If you're paranoid get one made for a tandem.
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Old 10-27-06, 12:30 PM
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No problems yet on my Specialized Roubaix. I weighed 245# when I bought in in '05 - am 215# now.
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Old 10-27-06, 02:43 PM
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I'm on one of those Lemond Spine Design bikes and I weigh 280... no problems here
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Old 10-27-06, 03:46 PM
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I got a '06 Secialized Roubaix Elete full carbon. I weigh 250lbs. I've ran into and over some obsticles that made me worry about the fork and frame. I've had zero problems with either. Buy a quality CF fork. You won't regret it.
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Old 11-07-06, 08:31 PM
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Regardless of which fork you get, pay careful attention to the fork manufacturer's directions regarding tightening the stem. Just because the stem manufacturer might use a certain torque spec does not guarantee that it matches the fork manufacturer's torque specs. If the stem is over-tightened, the steerer tube can develop cracks from the top down. Placing a 5 mm spacer above the stem should help to prevent damaging the steerer tube due to the stem being clamped too tight. And as with any material, inspect it regularly for cracks (including the steerer tube), and if you have doubts about it after a crash, replace it. A new fork will almost always be cheaper than a trip to the ER.
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Old 11-08-06, 01:36 PM
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My fork

I have this carbon fork on my Moser. Its 'Moser carbon' and is one heavy SOB. Heres the deal. It is very strong, chunky, and has an Al steerer tube. One thing I would not skimp on is a strong non-carbon steerer tube. Something about the weight and pressure of my braking or hitting something on a road bike while weighing 205 lbs is really scary if I have a carbon steerer tube.

So in conclusion, get a carbon fork if: its crazy strong (like a cyclocross carbon fork) and has an Al steerer.
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Old 11-10-06, 02:21 AM
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To the extent it helps, I rode a Cannondale with a Kestrel EMS CF fork (alu steerer) for several years without a hiccup, and for reference, I am 6'0" and 250 lb.+. Hope this proves useful.

Cheers
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Old 11-10-06, 05:49 AM
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Tandem carbon forks such as woundup have a different trail to solo ones. Im sure a company like woundup could make a clyde-friendly solo fork if you asked.
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Old 11-14-06, 07:59 PM
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get an alpha q z-pro. full carbon, beefiest fork that probably exists. No weight limits, no spacer height limits because it's so strong. pretty light and no more expensive that any other decent carbon fork. 450mm steerer tube is handy if you're tall, too.
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Old 11-14-06, 10:32 PM
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I did a lot of research on this subject because I weighed 235 when I bought my Litespeed. I installed an Alpha Q Z pro because it is specifically designed for big riders.
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Old 11-14-06, 11:04 PM
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Originally Posted by Dial_tone
You really have to check on carbon forks; they vary a lot. I just bought an all carbon so I did some checking.

Weight Limits for ALL carbon forks:
Easton EC90 SL & SLX - No limit per Easton (the one I plan to buy next)
Flyte CR3 - 280 lbs (the one I have now)
Alpha Q GS series - 225 lbs
Alpha Q CS series - unknown
Alpha Q SUB 3 - 200 lbs
Reynolds Ouzo Pro - 200 lb limit for 1" steerer, 210 for 1 1/8" steerer
Ritchey - never responded
Aerus - never responded
I asked Ritchey what their limit was on Oct 2.....they just got back to me late today. Six freaking weeks later. I won't be buying squat from them with that service. I really am in the market for a fork too.
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Old 11-15-06, 02:21 PM
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OK I'm curious, why a carbon fork? Thge weight of my bike is a who cares compared to me so why spend a bunch of bucks to get a lighter fork? Or do they make it springer for comfort?

I sure a carbon fork can be made strong enough, they use carbon fiber renforced plastic for airpane parts and I'm sure they can taylor it for whatever is required. But I don't understand the advantage over steel. Help?

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Old 11-20-06, 06:59 PM
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Reynolds

I have used 2 different Reynolds forks for over 4 years and am 255# and have had no problems. Both were 1-1/8" and carbon steerers. If you read up on carbon you'll see that forks are a eaiser design challenges than frames as the loads are more predictable.
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Old 03-15-08, 11:45 AM
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bump, anyone use a TT carbon fork for their road bike?
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Old 03-15-08, 06:47 PM
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Shouldn't be a problem. The people that complain that they break stuff all the time are the ones who will NOT take care of anything.
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