Cannondale Syntace Rear Thru Axle The Right Fit, Every Time When you need to replace the rear thru-axle on a Cannondale road bike with Syntace X-12 dropouts, this is the correct part. A generic axle is not a safe substitute here - the Syntace X-12 system uses a specific interface that requires the right axle to seat and clamp correctly. This axle restores the precise fit the frame was designed around, keeping the rear wheel locked in place and your disc brake rotor centered on every ride. Features Syntace X-12 compatibility designed specifically for Cannondale road frames using the Syntace X-12 dropout system12mm thru-axle interface stiffer and more secure connection than quick-release, with better brake rotor alignment Rear-specific fitment correct thread pitch and length for proper engagement in the dropout OEM replacement part restores factory axle fit for reliable wheel retention and consistent handling | Cannondale | Syntace Rear Throughaxle 142X12 163Mm M12X1. 0P Sl Raw