RaceFace Next SL G5 Crankset - 170mm Direct Mount 136mm RaceFace CINCH Spindle Interface BLKRaceFace Next SL G5 Crankset 170mm Direct Mount 136mm RaceFace CINCH Spindle Interface Black. Built off the proven Next R crank arm shape and spindle insert the Next SL stands to be ligher with major improvements in durability and carbon consistnecy.. Made in Canada with American sourced carbon the Next SL is also stiffer improving power transfer and giving you the competitive edge on your pedal oriented cross country rig. Increased stiffness and