Just finished installing my new durablue. In the instructions they say to tighten axle nut to 20/40ft pounds which seems low after removing the OEM nut. Any problems with the nut coming loose?

 

Hmm, thats a new one to me. I use a 32" pipe wrench and lift up on it until the bike comes off the ground. Then I ride it around for a few minutes and tighten again, then screw in the lock.

 

I tighten mine to 40 lbs, maybe a little more because I attach an open end axle wrench to the torq wrench which probably gives it more leverage. Last time I came back from the dunes it loosened up a bit, but I didn't get much lock tight on the set screw because I ran out.