I have for sale an XTR M900 crank. This uses a square tapper bottom bracket. It functions like new and has some regular wear marks on it. The side of the cranks are rubbed and there are a few inconsequential nicks. It has 46-34-24 rings. The big ring is original with lots of life yet, the middle ring is a newer, it's a REAL ring. The small ring is even newer, its a Shimano SG ring. I will include a NEW REAL 34 tooth middle ring with your purchase. The length of the crank is 172.5. It requires a 107mm-116mm square tappered bottom bracket. I will include new 110mm RACFACE Titanium bottom bracket for an extra $45.(Installed in a frame, but never had cranks pressed on it.) $125 for the crank, shipping $7.00. I'll take check, M.O. or Paypal, shipping via priority U.S. mail, insured.