Cannondale HollowGram R45 Disc Rear Wheel 

Whether used as a road or gravel wheel, Cannondale’s HollowGram R45 Disc Rear Wheel provides speed, reliability and performance. 

At 45mm deep the carbon rim helps reduce drag whilst the broad, blunt profile ensures that it isn’t unduly affected by crosswinds. The 32mm external width also adds excellent sidewall support for wide gravel tyres and creates a smoother junction between rubber and rim when used with a road tyre. 

As the rim is tubeless compatible, it easy to take advantage of the many benefits of not using an innertube. Tyre pressure can be lower without risking a pinch puncture, giving greater comfort, more grip and less rolling resistance. 

The hub features internals by Formula that offer 21 points of engagement for good pick-up when accelerating or overcoming an obstacle on the trail.