[MaxAqua]

So the back rim on my bike keeps shifting up.
I tighten it, and it stays, but when i try to ride it, the rim slides all the way up on the frame.
Any way i can fix this?

 

[MaxAqua]

I cleaned the frame around where you put the rims onto it, and i tighten the nuts, but its a no go.

 

[Wumpus]

http://www.surlybikes.com/parts/tuggnut_pop.html

or any of the BMX equivalents