Join Date: Jun 2006
Bikes: 03 Raleigh Professional (steel)
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Pretty sure there's a thin steel washer under the bolt head. It's there to keep the bolt from galling the light alloy of the crank arm. And wasn't there a dust cap?
Sounds like the bolt wasn't torqued correctly, and may not be this time. Find a friend with a torque wrench and check both sides.
Stupidity got us into this mess - why can't it get us out?
- Will Rogers