Proven by the fastest Professional Triathletes in the world, including Tim Don / Ben Hoffman / Braden Currie / Lisa Roberts / and SO many more, it's no wonder why our Oversize Hyper Speed System is quickly becoming the "Go To" Oversize System on the market. Utilizing our unique 14-Tooth/18-Tooth pulley wheel combination, our Oversize Hyper Speed System is designed to provide precise and repeatable shifting along with decreased drivetrain friction. Locally produced aerospace grade carbon fiber cages, CNC machined anodized pulley wheels, and coated hybrid ceramic bearings all combine to provide the lowest friction possible along with durability that's unmatched.
ALL SLF MOTION PARTS ARE DESIGNED, TESTED, AND BUILT BY HAND IN PAWNEE, ILLINOIS - USA
Compatiblity (see photos below) - Shimano
Model 679 (Ultegra 6700/6800 and Dura Ace 7900/9000) - Compatible with cassettes up to 28T
Model 891 (Ultegra 8000/8050 and Dura Ace 9100/9150) - Compatible with cassettes up to 32T