Originally Posted by
fietsbob
... and then you fix a Nylon Insert locking nut on the opposite side ..
Ask for a Ny-lock nut in the appropriate size. and number..
While ny-lock nuts are great, I would still use a metal locking washer as well. For those of us in the hot climates (temperatures above 100 degrees) those nylock inserts can soften (or even melt) and the metal locking washer adds a nice redundancy. Temperatures on pavement in the American southwest can be as high as 140 degrees in the foot or so above the pavement. The paved area around the Pheonix Airport has surface temperatures of 160+ degrees in the summer.