Zipp 303 XPLR SW Wheelset

The Zipp 303 XPLR SW Wheelset starts from an unusual premise: instead of designing a wheel and then finding tires to fit it, Zipp designed this wheel around a specific pair of tires. The result is a carbon gravel wheelset with a 32mm internal rim width and 54mm rim depth—dimensions that look more like a road aero wheel than anything the gravel category has seen before. The "SW" stands for Super Wide, and that width is the whole argument: a wider rim changes how a tire sits, how it rolls, and how fast it moves through air when paired correctly.

The Rim

The 303 XPLR SW's carbon rim measures 32mm internally and 40mm at its widest external point, with a 54mm depth. At that internal width, a gravel tire mounts and seats in a shape closer to what the tire manufacturer actually modeled: rounder, more compliant, and with a contact patch that responds predictably at lower pressures. Zipp designed the rim profile around the Goodyear Fitment Series—specifically the Goodyear XPLR SLICK and Goodyear XPLR INTER—and calls the approach Total System Efficiency, or TSE. The idea is that the aero relationship between rim and tire is only predictable when the two are designed together. Conventional wheels are profiled around an abstract tire cross-section; this wheel is profiled around two actual tires. The hookless bead seat is a consequence of that philosophy: tubeless-only construction allows the rim wall to be shaped for aerodynamic optimization rather than structural accommodation of a clincher hook. Maximum tire pressure is 50 psi. ABLC dimpling—Zipp's aerodynamic boundary layer control surface treatment borrowed from their road wheel lineup—covers the rim's outer surface to maintain airflow stability. Zipp's internal testing found 2-watt savings at average gravel race speeds of 29–36kph compared with a peer wheel, with the advantage growing to 10 watts or more at descending speeds above 53kph.

The Hub

The ZR1 disc hub is engineered in Germany and uses 66 points of engagement for a responsive, precise pickup under power. On technical gravel terrain where pedaling is intermittent—short punchy accelerations out of corners, quick re-engagement over rough sections—that engagement count translates to a hub that bites the moment you load the pedal. The rear hub ships with either an XDR or SRAM/Shimano driver body; Microspline and Campagnolo N3W driver bodies are available separately. Both front and rear use Centerlock rotor mounts and 12mm thru-axle standards: 12x100mm front, 12x142mm rear. End caps are included.

The Tire Compatibility Question

The 303 XPLR SW is only approved for use with the Goodyear XPLR SLICK and Goodyear XPLR INTER tires. This is not a soft recommendation—it is the wheelset's design constraint, and using unapproved tires voids Zipp's warranty on the wheel. The logic goes back to the TSE concept: the rim profile, hookless bead geometry, and pressure range were engineered around those two tire casings. Running a different tire changes the aerodynamic relationship, the bead retention dynamics at low pressure, and the safety margin that Zipp's engineers were designing toward. Riders comfortable within that pairing—and both Goodyear XPLR tires are well-regarded for gravel racing performance—get the full system benefit. Riders who want the flexibility to mix and match tires should look at the Zipp 303 XPLR S, which has a narrower rim and broader tire approval list.

Who It's For

At 1,496 grams including valves and rim tape, the 303 XPLR SW is not a weight-focused gravel wheel. It's an efficiency-focused gravel wheel, which is a different priority. The combination of deep rim, wide internal profile, and TSE-matched tire produces a setup that rolls with less aerodynamic drag and lower rolling resistance than a conventional narrow gravel wheel—particularly at the speeds and tire pressures common in gravel racing. At $2,200, it competes at the upper end of carbon gravel wheel pricing. The rider it's built for has a specific goal: to go faster on gravel, within the constraints of a matched system. If that's the goal and the Goodyear XPLR tire pairing fits the terrain, the 303 XPLR SW makes a focused, well-engineered argument for how gravel performance can be approached differently.