Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.Dylansbob
05-13-09, 10:27 AM
I picked up a set of bontrager two piece cranks at a swap a few months ago. I know how important proper torque is on this style of cranks, so I'm using a torque wrench to ensure proper fitment. At 500 in/lbs , the left arm comes loose rapidly. I'm guessing the previous owner overtightened the cranks and did some damage. Soooooo, my big question is do I replace the bb cups? Or is the problem with the left arm itself?