Zipp 303 XPLR SW Wheel Front

The Zipp 303 XPLR SW Wheel Front is built for one purpose: going fast on gravel without giving up control when the surface turns rough. Zipp designed the 303 XPLR line specifically for off-road racing rather than adapting a road wheel to dirt, and the SW sits at the top of that lineup. It carries a 54mm-deep, hookless carbon rim with a 32mm internal width and 40mm external width — dimensions chosen to let riders run tire pressures well under 30 psi without the tire squirming under load in corners or on loose climbs.

That ultra-wide profile is the core of what Zipp calls its Total System Efficiency approach applied to gravel. Lower pressure means more contact area and better vibration absorption on chattery surfaces, which translates to less fatigue over long gravel races and more traction when the terrain gets loose. The rim itself is tubeless-only and finished in UD carbon, and the wide-to-tire transition is engineered to keep the aero profile clean even with a wide gravel tire mounted. One important note for anyone building a wheelset around this front wheel: the 303 XPLR SW is only compatible with approved tires — specifically the Goodyear XPLR Slick and Goodyear XPLR Inter — so tire choice isn't optional here the way it would be on a standard hookless rim.

Hub and build quality

Spinning inside the rim is Zipp's ZR1 disc-brake hub, a German-engineered design built around 66 points of engagement for quick response out of corners and off the front of a climb. The hub uses cartridge bearings and is available with SRAM XDR or SRAM/Shimano HG driver bodies, with a Campagnolo N3W option sold separately, so it slots into most modern gravel drivetrains without forcing a compromise. This front wheel uses a 12x100mm thru-axle and 24 black CX-Ray spokes laced in a 2-cross pattern — a build that favors stiffness and quick handling over outright compliance, since the rim's low-pressure capability is already doing the work of smoothing out the terrain. Braking is handled through a center-lock disc interface, and the wheel is rated to a 50 psi maximum tire pressure and a 298 lb/135 kg system weight limit.

This is a wheel for the rider who treats gravel racing the way road racers treat a time trial — someone chasing every bit of rolling efficiency without sacrificing the control needed when a course turns to washboard or loose double-track. It rewards a rider who's already dialed in their tire pressure and setup, since the performance ceiling here is high but tied closely to running the approved tire options at the pressures the wheel was built around. Paired with a matching rear wheel, the 303 XPLR SW becomes a race-day wheelset rather than a general-purpose gravel upgrade — light enough to notice on climbs, wide enough to hold a line through loose corners at speed, and backed by Zipp's lifetime warranty against manufacturing defects.