Frame Repairs

Although frame failures are not "common", they are common-enough that some approaches have been figured out that are worth knowing about when there is a failure.

Stripped "Euro"-threaded Bottom Bracket

A "Euro"-size threaded bottom bracket is large diameter with fine threads, which makes it sensitive to manufacturing tolerances. It is also somewhat stretchy and is under high load. It is also subject to a varying load which tends to "work" the bottom bracket in the frame.

The net result is bottom bracket threads strip out sometimes.

"Euro" sizes include ISO/English/Japanese, British, French, Itlian, Raleigh, and Swiss. (See MOBI BB standards for specifications of common bottom brackets.)

Some frames cannot be repaired at reasonable cost, but sometimes repairs are worthwhile. Here are some approaches that may help: