Zipp: Zipp’s 303 SW Tubeless Disc-brake wheelset offers superior speed on all roads, no matter the surface. Steeped in Zipp’s legacy of innovation, the 303 SW is a modern classic wheelset, fully capable of road, gravel, cobbles, and cyclocross riding. The 303 SW rim internally integrates the Zipp AXS Wheel Sensor for accurate on-bike tire-pressure monitoring. It allows you to monitor and analyze tire pressure in realtime without an external device mounted to the valve stem. Fine-tuning tire pressure helps riders optimize speed and performance in an ever-changing riding environment. Before you ride, check your pressure immediately; green light means good to go. During the ride, monitor pressure to dial in your ideal setting and detect issues early. The 303 SW’s 40mm deep rim design takes design queues from the gravel-specific 303 XPLR to utilize a wide rim design for high aero efficiency and low rolling resistance on a wide tire platform designed for modern riding at lower tire pressures. The rim’s profile provides low drag and an improved transition between rim and tire, boosting aerodynamic efficiency with wider tires. The wide-rim stance also features less tire deflection for reduced rolling resistance. Combining the wider tire, increased tire volume, and lower tire pressure helps reduce rider fatigue by smoothing out the ride over imperfect pavement and road conditions—the tire and wheel system absorbs the shaking, not the rider. A revised carbon layup and design also infused the already bombproof 303 SW with an almost 10 percent improvement in impact strength at a light weight. The 303 SW is optimized for tires 30 to 35mm in width, with the best performance with 35mm tires. The 303 SW rims feature a refined shape that helps shield the tire in an impact that would otherwise cause a pinch flat. At the center of this is the ZR1 hubset, which now has stainless steel bearings for improved durability and smoother performance. Features
Fully capable wheelset for modern
WH-M9220 XTR lightweight Enduro /Trail Carbon wheel, designed to meet the pro criteria
These wheels are lightweight, strong and durable with a tubeless compatible, 4 mm thick hookless carbon 30 mm internal rims
28 durable stainless steel spokes
Alloy 12 speed MICRO SPLINE freehub body with quick pawl engagement (3.5 deg) provides instant power transfer
Stainless steel cartridge bearing with pre-load adjust for Optimized sealing and ease of maintenance
Wide bearing placement gives excellent lateral rigidity further improving strength and durability
Forged then anodized alloy hub shell for maximum strength and long lasting good looks
Easy to use Centre-Lock Disc Rotor mount
Aluminium axle
For 148 x 12 mm dropouts
For use with 12 speed HYPERGLIDE+ cassette sprockets