To reduce speed robbing friction the RED rear derailleur uses new AeroGlide pulleys. The AeroGlide pulleys have an optimized tooth profile to work best with SRAM''s PC-1091R chain although other 10-speed chains will work just fine. These pulleys are the key to this derailleurs quietness. To insure that they roll smooth SRAM uses Black-Box Ceramic Bearings in both the upper and lower pulleys.
DETAILS
- Exact Actuation shifting provides fast, accurate shifts
- More clearance with 28t cassettes thanks to longer B-knuckle
- Silent shifting with optimized AeroGlide pulleys
- Ceramic pulley bearings
- New spring-fixed barrel adjuster
- New chain pulley cage adds precise chain management
- Titanium hardware keeps things light
