Our premium 1X RaceFace Boost 148 direct mount compatible Oval chainrings are designed for CINCH system RaceFace uses to mount chainring directly to the crank. This version is for BOOST 148 specific bikes and FAT BIKES (when reversed).
Difference between Boost148 and non-boost chainrings is in the offset/dish of the chainring itself only. You would use the same crank in both boost and non-boost bikes, but chainring offset has to be different to accommodate chainstay clearance. Boost chainrings have only 3mm offset while non-boost ones 6mm.
Advantages of our special Direct mount chainrings:
size (mass +/-1g): | 26T (52g), 28T (54g), 30T (58g), 32T (62g), 34T (69g), 36T (coming) |
compatibility | RaceFace Cinch system cranks; RF Next SL, RF SIXC, RF Turbine, RF Atlas, AEFFECT CINCH cranks. 9, 10, 11 and 12spd Eagle compati |
material | CNC machined 7075 Txxx Aluminium. Long-lasting construction |
finish | type II anodizing |
chainline | 52mm. 3mm offset |
ovality | Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent Pending |
Size (Mass +/-1g): | 26T (52g), 28T (54g), 30T (58g), 32T (62g), 34T (69g), 36T (coming) |
Compatibility | RaceFace Cinch system cranks; RF Next SL, RF SIXC, RF Turbine, RF Atlas, AEFFECT CINCH cranks. 9, 10, 11 and 12spd Eagle compati |
Material | CNC machined 7075 Txxx Aluminium. Long-lasting construction |
Finish | type II anodizing |
CHAINLINE | 52mm. 3mm offset |
Ovality | Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent Pending |