Have a 2010 GF Hi Fi Pro with Shimano XT-M770 crank. Came stock with a 44-32-22. I converted to 10 speed and took off the 44. Now I want to change to 38/26 rings. Will those rings fit on the crank I have?
Yes, you can run a 38 as long as it has a BCD of 104mm and a 26 with a BCD of 64mm. (BCD is "bolt circle diameter").