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Stuart's e-mail related geniuis bike mechanic

Stuart's e-mail related geniuis bike mechanic

Hi Stuart,

I did not see your BBC Talk e-mail until after BBC Talk was shut down.

I had something similar on my Felt and it was at the same spot in the perdal stroke, but only on the big ring.  It turns out the outer edge of the front derailleur was rubbing the back of the crank.  Probably not the same issue for you, but who knows ...

Good luck!


Jim Guild

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Re: Stuart's e-mail related geniuis bike mechanic

Problem found, not solved.  Colnago C40 frame cracked due to minor crash!
So, I won't bore you again with the details for those that didn't see my post to BBCTalk before it shut down but I REALLY do appreciate ALL of the responses and ideas.  My beloved C40 with a special Mapei WC paint job started making a horrible noise from the crank/bb area last year after I had a minor crash.  I had overcooked a corner on a Glenelg Gang ride and rode it into a rural asphalt curb, scraping the crank arm and doing a "harmless" tumble on the soft grass.  I straightened out the bars & shifters and completed the ride and rode it many hundreds of more miles last season.  After months of the noise coming and going, replacing cleats, shoes, pedals, crank arms, complete cranks and finally bottom bracket it was still there. 
Wednesday I took apart seat post, replaced the seat, took apart bars, stem, headset and removed the fork examining everything and cleaning up before reassembling and relubing the headset.  Noise still there last night.  So at the end of the ride, Bruce and I examined the bottom bracket area closely and with me applying a horrible amount of lateral stress (flexing the crank arm at a 45 degree angle, deflecting it an inch) I began to further crack the white paint at the bottom of the seat tube where it goes into the BB carbon lug, where the vertical lug joins the chainstay lug and perhaps in the “web” between the chainstays just in front of the rear wheel.
Thanks to Ed C. and Charlie for the heads up on potentially getting Calfee to do repairs on it.  I might investigate it but with 20,000+ miles on it, I might just strip it to the frame, wax it and hang it on the wall as Mapei artwork.  It is a shame, was a favorite bike, but I got my money’s worth out of it!

~too much of anything is just enough for me. Pete Townshend

Stuart Lamb
Stuart the Descender
196 Posts
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