Originally Posted by veganboyjosh

it's not mounted to anything. it just floats in there. if it falls out, then it needs to be bigger.

i've got one on a tallbike, cos the distance between the two frames/chainring and hub isn't adjustable. works like a dream. altho, it's hard to ride behind someone rocking one of these, cos it's like magic or something, and it's hard to not stare into the thing. it seems like it should fall out, or creep forward or backwards, but it works.