Looking at at new pully to go with my DNA wheels, I know my OEM pully is 40289-00 and 70T, but DNA offers two sizes. 1-1/2" and 1-1/8" Can someone help me with which I need please? Sorry if this is a noob question.

https://www.dnaspecialty.com/collect...ts/mesh-pulley

 

What year bike? Quick solution is to measure across the face of your belt as that is the measurement that is referred to.

 

05, Thanks, I actually answered my own question with a Google search. Thank you. 1-1/8th.

 

One more quick question, New to the mechanical upgrades, I'm doing new wheels and going to order a chrome pully from DNA to match my new wheels, I now know the size, but do I need a spacer as well? Sorry for the noob quiestion.