Cannondale F-Si

The F-Si was Cannondale's flagship XC hardtail, conceived in Bedford, Pennsylvania as a successor to the Flash F29 and launched for model year 2015 to chase World Cup XC podiums. Its signature trick was the proprietary Lefty Ocho single-leg fork paired with an asymmetric Si rear triangle and Ai offset hub spacing, which let engineers run very short 429mm chainstays without sacrificing tyre clearance or wheel dish. The frame used Cannondale's BallisTec carbon layup, with a Hi-MOD version dropping under 900g. Throughout 2016-2022 it was the platform Manuel Fumic, Henrique Avancini and Anton Cooper raced on. By 2024 demand for pure hardtails collapsed as the lightweight Scalpel full-suspension took over the XC duties, and the F-Si quietly disappeared from Cannondale's global lineup, with the last 2024 Carbon 4 builds being run-out stock at dealers.