I want any cranks longer than my 125mm ones as I am finding it to hard to pedal up slopes. I will consider any brand, including the cheapest Quax lightweight if you have these. Will also swap if you like.
Hey Pete! It’s me again. I have a pair of 137mm KH moments for you.
You can PM me if your intrested. 
KH is also lighter then Qu-AX.
still looking for some
Still looking for some. Anyone got any second hand ISIS crank 137 or 150mm?
Ideally quite a cheap one:)