42T

 6061-T6 alloy construction 8 and 9-speed compatible Silver anodized finish CNC Made in the U.S.A. 104mm 4-bolt 42T 6061-T6 Silver 8/9sp Standard

 AL6061-T6 alloy replacement rings 8, 9, and 10 speed compatible Black anodized with silver CNC machined teeth Available in ramped/pinned and standard styles Made in the USA 104mm 4-bolt 42T Ramped/Pinned Black/Silver 8/9/10sp Standard

 Replacement OEM MTB chainrings for Sram and Truvativ cranksets 120mm 4-bolt 42T L-Pin Alloy GXP Black 10sp Standard Outer