The Golden Wrench

A blog about bicycle repair and maintenance by the mechanics at Freewheel Bike.

Friday, May 15, 2009

Repairing stripped crank arm extraction threads

What do you do when the crank arm extraction threads strip out?

Repair them with the Stein Crank Extractor System:

Install the cutter pilot into the bottom bracket spindle:

Put the oversized tap onto the pilot:

Cut new threads:

Install the special Stein self extracting cap:

Rotate the cank bolt counter clockwise to remove the crank arm:

Now the crank arm is re-usable and better than new for only $25: