KCNC Narrow/Wide Ultra Pulley Wheel

Article number: 021-02-03
Availability: In stock (2)

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 pulley is equipped with a small yet durable sealed steel cartridge bearing with secondary labyrinth seal dust caps. These pulleys are available in either long or short tooth profiles.




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 and profiles 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


Weight, 12t 9 grams
Weight, 14t 10 grams
Weight, 16t 13 grams
Material 7075 aluminum
Bearing 687, steel cartridge
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