Speed Gains at Lower Tire Pressures
The 303 XPLR rim design provides measurable speed gains by lowering your tire pressure more than with previous wheels. A rider going 32 kph on gravel riding 40mm wide tires saved about 8 watts at 28 psi (1.9 bar) compared with a more traditional gravel wheel with 40mm tires at 36 psi (2.5 bar).