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).
Size (Mass +/-1g):
26T (52g), 28T (54g), 30T (58g), 32T (62g), 34T (69g), 36T (coming)
RaceFace Cinch system cranks;
RF Next SL, RF SIXC, RF Turbine, RF Atlas, AEFFECT CINCH cranks.
9, 10, 11 and 12spd Eagle compatible.
CNC machined 7075 Txxx Aluminium. Long-lasting construction
type II anodizing
52mm. 3mm offset
Optimized to each size separately.
Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent Pending
Difference between Boost148 and non-boost chainrings is in the offset/dish of the chainring itself only. You would use 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:
*We mastered our oval chainrings to perfection, so you can get best possible advantage from the oval/elliptical shape.
*Finest design to provide excellent weight to strength ratio
*One of a kind special oval shape (Patent Pending)
*Greatly improves traction and climbing abilities
*Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!
*Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically
*They save weight because they don't need the spider and chainring bolts.
*The ability of installation of a smaller ring sizes that can't be mounted on regular spider.
*Superb quality and great look.
*You will ride faster using ovals. If you keep using round ring then others will get quicker.
*You will not "feel" the oval shape at all
*Reduces stress on knees
*Chainring is reversible and fits also Fatbikes with 170/190mm axles