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is it just me or all CF forks do it?(5 posts)

is it just me or all CF forks do it?cyclopathic
May 1, 2002 11:15 PM
had real trouble with Look transmitting road vibration, then it got better after putting ~400-500mi, good part on coarse pavement. Still anytime I've read reviews on diff forks (Columbus, Look, etc) if there were a complain of similar nature, it would usually start with "I just got XX fork and.."

SO my Q is "do CF forks go through break in?" comments welcome
Off the cuff I would say nograndemamou
May 2, 2002 3:34 AM
But I'm not a materials expert. I only have one bike with a carbon fork and I did not notice any difference in ride as I packed on the miles.

Could it be that you have become accustomed to it or possibly adjusted your position to accomodate it some how?

I know when I got my Bianchi my Gios felt slow. I just felt much faster on the Bianchi. Sadly, my speed did not increase. I did have much better acceleration and cornering because the bike was lighter and stiffer. This is probably what gave me the illusion of greater speed.
I believe "break-in" happens with a lot of things...Leisure
May 2, 2002 4:33 AM
I think it's much more common than most people think. I'm admittedly unsure about whether it happens that much in carbon fiber stuff. I think if you're feeling a difference (and it sounds like a decisive difference), it must be there. But is it happening in the carbon fiber, or is it elsewhere in the fork, like the steerer tube, the carbon/metal interface, the headset/steerertube interface, etc.
They'd better notKerry
May 2, 2002 3:57 PM
A CF/epoxy composite structure properties can only change through 3 mechanisms: fiber breakage, breakdown of the epoxy, fibers pulling out of the epoxy (which also implies epoxy failure in some way). If any of these happen, you're on the road to system failure. It's extremely unlikely that you are experiencing "fork break-in". Something else is going on, including warmer weather (changing tire properies and your feeling on the bike), an adaptation by you, tire wear and associated changing handling. I'm putting my bets on your personal adaptation. Either that or you're not pumping your tires as hard as you used to :)
re: it isn't mecyclopathic
May 3, 2002 5:19 AM
since I ride several bikes and have an opportunity to compare to baseline. The other thing I had only a few rides on it (granted they were all over 100mi), so the change was rather easy to observe.

Fork feel didn't change at all the major improvement was it stopped resonating in usable range. Temperature could have accounted for but to tell the truth it didn't change more then 5-8F.

I am thinking gluing and esp drying layers had created "stress points" and made fork stiffer and thus prone to resonance. "Break-in" /and hopefully not "break-down"/ removed it via partial epoxy failure in stress points, and/or fiber stretching/realigning and it was sufficient to move resonance frequency out of usable range.