KCNC Ultra Narrow/Wide Pulleys are designed as premium aftermarket replacements for modern derailleurs on 1x11 and 1x12 drivetrains. The alternating thickness between teeth aids in chain retention over fast and bumpy terrain to ensure constant engagement of the drivetrain. The body of the pulley wheel is intricately machined from strong and lightweight 7075 series aluminum in an attractive alternating spoke pattern. Each pulleys is equipped with a small yet durable sealed steel cartridge bearing with secondary labyrinth seal dust caps.
KCNC Narrow/Wide Ultra Pulleys are sold individually, and are intended for use on Sram's series of X-Horizon rear derailleurs. For best performance, pulleys should be ordered to match the tooth counts of the stock pulleys:
Sram Force 1/Rival 1 - 12t upper, 12t lower
Sram XX1/X01/EX1/GX/NX 11sp - 12t upper, 12t lower
Sram XX1/X01/GX Eagle 12sp - 12t upper, 14t lower
|Weights||12 tooth - 9.0 grams|
14 tooth - 10.1 grams
|Bearing||687, steel cartridge|