WHEEL TOP-MTB Crankset-2-PIECE CRANKSET- SR-13-A- 176mm Q-Factor-Chain line 50-52mm-1x12 speed. The WHEEL TOP SR-13-A mountain bike crank counterweight and the efficiency do not reduce the ruggedness. Patented wide and narrow gear design for faster and more accurate speed change. This 2-PIECE CRANKSET offors 32T,34T,36T and 38T gears and 170,172.5,175mm crank arms. We apologize for the inconvenience, but at the moment, we do not offer sales of this product to individual consumers. However, we do have options for B2B sales and would be happy to assist you through our offline business team. You can reach them at sales@wheeltop.com for further information.