With all your encouragement and instructions I took a small chainsaw sharpening file to my cranks. All but the top "crack" shown in the "before" pictures came out with fine-grain sandpaper. I am hoping that means that they were not cracks, but scratches or some other surface flaw...?
"After" pictures are below. Aesthetics aside, what do you think? Would you ride these cranks? FYI, I'm about 5'9, 150 lbs. My daily commute is only about 12 mi. round trip, which I ride very aggressively.
Despite the apparently successful results, I am still a bit nervous. Has anyone heard of an LBS offering a crack detection service (e.g., Magnaflux)? Anyone know of liquid penetrant home kits/sources for?
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Thanks much, Ryan Hildebrand Costa Mesa, Calif.
---------- Forwarded message ---------- From: ryan hildebrand <greengate@gmail.com> Date: Oct 15, 2006 7:56 PM Subject: Stress cracks on Super Record cranks? To: greengate@gmail.com
While cleaning my bike today I noticed some very small marks on my 1979 Super Record spider:
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Is this something to worry about? Please advise!
Ryan Hildebrand
Costa Mesa, Calif.