Chain tensioner & Pulley with carbon composite for C LINE Full aluminum alloy body. 10T guide wheel ( /- steel gear) single side carbon fiber side cover. (or you can choose the 12T guide wheel ( /-steel gear) double-sided carbon fiber side cover) Black ceramic pipes outer diameter 7.92mm. Effective variable stroke 38MM. For C line modified 7-speed cassette. Chain tensioner & Pulley with carbon composite for P LINE Full aluminum alloy body. 10T guide wheel ( /-steel gear) single side carbon fiber side cover. (or you can choose the 12T guide wheel ( /-steel gear) double-sided carbon fiber side cover) Black ceramic pipes outer diameter 7.92mm. Effective variable stroke 38MM. For P line 4- 7-speed. ATTENTION: Suncord products to be free from defects in materials or workmanship for a period of one year after original purchase unless otherwise stated below. The warranty is non-transferable and valid to the original purchaser of the product only. The warranty on Suncord products is NOT VALID if the products have been purchased from an unauthorized dealer/online retailer
