I would recommend you set of Profile Magnutanium Cranks in 145 - 160mm and combine it with a spline drive sprocket. i've been riding this set up for lots of years ( with a 20T tree spline drive sprocket ) ( frinds of mine too ). I also doing lots of one eigthies to fakie hops and this Magnutanium crankset - tree spline drive sprocket - combo holds up fine. its superlite and great quality! i know the price is not low but its worth any dollar. -------------if i would get me a cheaper crankset, i would choose the ST. MARTIN EVO Spline Drive, cause its made with short arms and with great style and strong.Greets, Sascha