I have a set of Race Face Next LP Cranks (has the carbon fiber insets) and I'm pretty sure that is where my "creak" is coming from. The cranks are 4 yrs old now and it creaks when pedalling hard on uphills. A friend, used to be a mechanic at the local lbs, has gone completely thru my bike....cassettes, bottom bracket (even retapped the bottom bracket), bolts, etc. Does anybody else have these cranks with this problem??