Comments on: On One Cycles Carbon Super Light Fork http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/ 29er Bike Reviews, Rumors and News Fri, 29 Aug 2008 19:29:40 +0000 http://wordpress.org/?v=2.5.1 By: dirtpedaler » Two reasons to read Twenty Nine Inches http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3984 dirtpedaler » Two reasons to read Twenty Nine Inches Wed, 11 Oct 2006 20:44:29 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3984 [...] http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comments [...] [...] http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comments [...]

]]> By: wolfy http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3975 wolfy Wed, 11 Oct 2006 00:08:39 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3975 Brant, Very interesting. Would love to see pics of the process, cut-away drawings, etc. Just for curiosity's sake. Love your stuff too. Mary, Midge and Inbrer 29er fork... -M Brant,

Very interesting. Would love to see pics of the process, cut-away drawings, etc. Just for curiosity’s sake.

Love your stuff too. Mary, Midge and Inbrer 29er fork…

-M

]]> By: funkenstein http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3972 funkenstein Tue, 10 Oct 2006 21:07:14 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3972 ha, I'm just a crusty old shop rat and long time Bontrager fan/rider. Thanks for all the info, really does look like a nice fork. ha, I’m just a crusty old shop rat and long time Bontrager fan/rider. Thanks for all the info, really does look like a nice fork.

]]> By: brant http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3971 brant Tue, 10 Oct 2006 20:11:49 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3971 >How does this equate to the On-One fork being “the best carbon fork in the >universe….ever�? In my heart thats what I think. Those were my words. I'm half of on-one. I'm sure Pace think the same about theirs, and for their criteria (it is over 125g lighter than ours) I'm sure they're 100% right too. > fatigue tests don’t tell you anything really. carbon doesn’t >fatigue. I bet it would run it even longer than 159k. what really matters are >impact and energy tests. You're quite right there. All we could get to fail on our tests were the aluminium crown. We had several iterations of the crown, moving it from failure at 30,000 to 159,000 cycles. This was for a CNC sample crown, not the forged production crown, which happily, due to grain alignment issues will be significantly stronger. I do not see any other manufacturers publishing their fatigue test data on their site, but we'd be interested to see it. >Pace does the same thing with their forks, but I think they use Ti. this > increases the >impact and crush (seatpost) resistance. No. Pace doesn't do that at all (not for that reason and not in that way). Pace has carbon legs with either a ti or chromoly tube inserted into the crown, to bond the legs to. We use the same construction method. You press a short steel tube into the crown. You bond the carbon leg to the short steel tube. Pace did engineer in some alloy mesh into their suspension forks at one time to provide increased crush resistance when we were all running around with cantilever bosses that clamped on. I don't know if they do that still. I was very close to Pace for a while, when I was a journalist and think they make great stuff. I am Brant from on-one and I love our stuff. You're funkenstein and you seem to be defending Bontrager/Trek very hard. What's your background? I had a Race Lite in '93 and loved it. >How does this equate to the On-One fork being “the best carbon fork in the
>universe….ever�?

In my heart thats what I think. Those were my words. I’m half of on-one. I’m sure Pace think the same about theirs, and for their criteria (it is over 125g lighter than ours) I’m sure they’re 100% right too.

> fatigue tests don’t tell you anything really. carbon doesn’t
>fatigue. I bet it would run it even longer than 159k. what really matters are
>impact and energy tests.

You’re quite right there. All we could get to fail on our tests were the aluminium crown. We had several iterations of the crown, moving it from failure at 30,000 to 159,000 cycles. This was for a CNC sample crown, not the forged production crown, which happily, due to grain alignment issues will be significantly stronger.
I do not see any other manufacturers publishing their fatigue test data on their site, but we’d be interested to see it.

>Pace does the same thing with their forks, but I think they use Ti. this
> increases the
>impact and crush (seatpost) resistance.

No.
Pace doesn’t do that at all (not for that reason and not in that way).
Pace has carbon legs with either a ti or chromoly tube inserted into the crown, to bond the legs to.

We use the same construction method.

You press a short steel tube into the crown. You bond the carbon leg to the short steel tube.

Pace did engineer in some alloy mesh into their suspension forks at one time to provide increased crush resistance when we were all running around with cantilever bosses that clamped on. I don’t know if they do that still. I was very close to Pace for a while, when I was a journalist and think they make great stuff.

I am Brant from on-one and I love our stuff.

You’re funkenstein and you seem to be defending Bontrager/Trek very hard. What’s your background?

I had a Race Lite in ‘93 and loved it.

]]> By: funkenstein http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3970 funkenstein Tue, 10 Oct 2006 19:37:52 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3970 I am guessing it's a 90% carbon, 10% alu kinda thing. The alu is really thin. It's not just for cosmetics. Pace does the same thing with their forks, but I think they use Ti. this increases the impact and crush (seatpost) resistance. Bontrager also makes a full aluminum version. I am guessing it’s a 90% carbon, 10% alu kinda thing. The alu is really thin. It’s not just for cosmetics. Pace does the same thing with their forks, but I think they use Ti. this increases the impact and crush (seatpost) resistance.

Bontrager also makes a full aluminum version.

]]> By: swedge http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3969 swedge Tue, 10 Oct 2006 19:20:29 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3969 Hmm so if it has an Aluminum insert is it an Aluminum Fork with a CARBON FIBER looking covering? If that’s the case the carbon fiber is just a Marketing gimmick. I work on F-16s for a living I Know carbon fiber.. Hmm so if it has an Aluminum insert is it an Aluminum Fork with a CARBON FIBER looking covering? If that’s the case the carbon fiber is just a Marketing gimmick. I work on F-16s for a living I Know carbon fiber..

]]> By: funkenstein http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3968 funkenstein Tue, 10 Oct 2006 19:09:15 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3968 OK, my bad. It does indeed have an alu insert. So 'splain me this. How does this equate to the On-One fork being "the best carbon fork in the universe....ever"? fatigue tests don't tell you anything really. carbon doesn't fatigue. I bet it would run it even longer than 159k. what really matters are impact and energy tests. seems to me an alu insert would make the fork more impact resistant. OK, my bad. It does indeed have an alu insert. So ’splain me this. How does this equate to the On-One fork being “the best carbon fork in the universe….ever”? fatigue tests don’t tell you anything really. carbon doesn’t fatigue. I bet it would run it even longer than 159k. what really matters are impact and energy tests.

seems to me an alu insert would make the fork more impact resistant.

]]> By: rockhound http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3967 rockhound Tue, 10 Oct 2006 18:10:11 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3967 A carbon fork offroad? No thanks...too scary. A carbon fork offroad? No thanks…too scary.

]]> By: brant http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3966 brant Tue, 10 Oct 2006 16:41:00 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3966 Have a look here - http://www.bontrager.com/Mountain/Components/Seatposts/5825.php Seatposts. ACC stands for "Aluminium Core Construction" - not Carbon Composite. It's also noticeable that this ACC isn't used on the high end post - thats an OCLV tube. Have a look here -

http://www.bontrager.com/Mountain/Components/Seatposts/5825.php

Seatposts.

ACC stands for “Aluminium Core Construction” - not Carbon Composite.

It’s also noticeable that this ACC isn’t used on the high end post - thats an OCLV tube.

]]> By: Guitar Ted http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3965 Guitar Ted Tue, 10 Oct 2006 16:22:24 +0000 http://twentynineinches.com/2006/10/06/on-one-cycles-carbon-super-light-fork/#comment-3965 funkenstein: ACC stands for AluminumCarbon Composite. Yes, there is an aluminum sleeve inside of the carbon tube. It is there to impart strength and a different ride characteristic than a straight carbon tube would have. It's not that Bontrager couldn't have made a purely carbon fork leg, they just think that the ACC construction is superior. This is not some idea I cooked up by the way, it's straight from my contact at Fisher. It's a technique that they also use in seat posts, by the way. funkenstein: ACC stands for AluminumCarbon Composite. Yes, there is an aluminum sleeve inside of the carbon tube. It is there to impart strength and a different ride characteristic than a straight carbon tube would have. It’s not that Bontrager couldn’t have made a purely carbon fork leg, they just think that the ACC construction is superior.

This is not some idea I cooked up by the way, it’s straight from my contact at Fisher. It’s a technique that they also use in seat posts, by the way.

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