Built for speed on any surface, the Zipp 303 SW is your go-to wheelset for road, gravel, cobbles, and cyclocross. It features Zipp’s integrated AXS Wheel Sensor, letting you monitor tire pressure in real time—no valve-mounted devices needed. Check before you ride (green means go) and stay dialed in as conditions change. Inspired by the 303 XPLR, the 40mm-deep rim uses a wide design for better aerodynamics and lower rolling resistance with wider tires. The result? A smoother, faster ride with less fatigue. The improved carbon layup increases impact strength by nearly 10%, while keeping weight low. Optimized for 30–35mm tires (best with 35mm), the rim shape helps prevent pinch flats and improves tire-rim integration. At the core is the updated ZR1 hubset with stainless steel bearings for smoother, longer-lasting performance. Fully capable wheels for modern road and multi-surface riders. First integrated, connected SRAM AXS wheel with Zipp AXS Wheel Sensor; ability to use sensor with compatible tube. UD Carbon, hookless rim construction, 40mm depth with ABLC SawTooth Dimples to provide low aerodynamic drag and crosswind stability. ZR1 disc brake hub with stainless steel bearings, CX-Sprint spokes. TSE for greater efficiency and reduced rolling resistance. Optimized for 30 to 35mm tires, compatible with tubeless tires only. Center locking rotor interface. Lockring is included with the wheels.