Thread: Bicycle thread
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Old 03-03-2011, 07:23 AM   #19218
Beastly Adventurer
Joined: Feb 2009
Location: central IL
Oddometer: 3,321
Originally Posted by Zodiac View Post
M, don't you think the buzz is more so when you're on an aluminum bike (with an aluminum fork) than when you're on a steel bike?

My theory is like a shock absorber; road is rough gives buzz from the ground up. As it travels up the steel fork into a steel frame it dissipates or goes through to the other end like a conductor. If it's a CF fork, it's meeting the other (different since it's a different material and resonates differently) material like steel or aluminum and they're repelling each other - like two different pitched tuning forks i.e. more buzz...

Since aluminum is so buzzy any CF at the lower ground level absorbs vibes well. So this works for alum bike frames.
But IMHO steel soaks up vibes better than CF, so CF forks on a steel bike is a wash. All you're creating is 2 different frequencies that meet at the headset - and most CF forks have a steel or aluminum steerer tube anyway (not high end).

Or maybe I'm just crazy....
I don't know if your theory is correct, as I believe carbon to have natural damping qualities. But, your thinking seems to be similar to my experience.

Again, I'm talking my new bike versus the old. Even though my Tricross has carbon seatpost, seatstays, and fork, it still has more buzz throughout than the vintage bike. And again, the Tricross is on 32mm Contis and the BSA is on 28mm Panaracers. IDK. Maybe I just need to go order a Vaya (It's orange, this year! And, only $1500 with Apex.) to figure this all out.

'09 Triumph Tiger1050
'96 Ducati 900SS
'02 Suzuki SV650S (hers)
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