38T

 6061-T6 alloy construction 8 and 9-speed compatible Silver anodized finish CNC Made in the U.S.A. 130mm 5-bolt 38T 6061-T6 Silver 8/9sp Standard

 6061-T6 alloy replacement rings 8, 9 and 10-speed compatible Black anodized with silver CNC machined teeth Made in U.S.A. 130mm 5-bolt 38T Non Ramped Black/Silver 8/9/10sp Standard