I recently installed a SunXCD copy of the T.A. Cyclotouriste crank on one of my bikes. I mounted it onto an old (as in "N.O.S.") Specialized cup & cone BB. The crank arms didn't fit very far onto the taper, and I did have to check and retorque the bolts after the first few rides. My guess is that the aluminum was deforming to match the axle's taper. There was significant loss of bolt tension for the first few rides.

As we all know, the best way to avoid a mechanical problem is to carry the correct tool with you! I've seen my share of people sitting by the side of the road with loose crank bolts, so back in the 90's (?), I bought a Cool Tool, which has a 14mm and 15mm socket for your crank bolts (tough luck if you are using your 16mm Stronglight bolts)





.....but tighten the chain tool portion against the body before wrenching on the bolt.

It's a really clever tool for vintage bikes. Not very light, though!

Steve in Peoria