Zipp 303 SW Tubeless Disc Front Wheel

Zipp 303 SW Tubeless Disc Front Wheel is a carbon road wheel built around a 40mm-deep, hookless rim, aimed at riders who want one wheel that handles smooth pavement, gravel, and cobbles without a setup change. It's sold individually as a 700c front wheel that pairs with the matching 303 SW rear, which makes it a straightforward way to upgrade one half of an existing wheelset, replace a damaged wheel, or complete a set already built around the SW hub and rim. At $1,050, it sits toward the top of Zipp's road and all-road lineup, and the build backs that up: a wide hookless rim, a reworked carbon layup, and a hub built on SRAM's ZR1 platform.

The rim is where most of the engineering shows up. Zipp brought the internal width to 25mm and the outer width to 33mm, with a symmetrical profile shaped around 30-35mm tubeless tires rather than the narrower rubber older road wheels were designed for. Zipp says the wider profile cuts rolling resistance and reduces rim deflection under load, which shows up as a steadier ride on rough pavement or gravel. Because the rim is hookless, tire choice is limited to ISO/TSS-compatible tubeless tires in the 30-44c range, run with sealant or a compatible tube, but the payoff is a rounder tire shape at lower pressure, which pays off once the road turns rough. Zipp also revised the carbon layup for this generation; the company says it improves impact strength by roughly 10 percent over the previous 303 rim, paired with a refined rim shape meant to resist pinch flats on hard hits from cobbles or a rutted gravel line. That combination is what lets this tubeless wheel move between a road race and a gravel event without a second set of hoops.

Twenty CX-Sprint bladed spokes, laced in a 2-cross pattern, tie the rim to Zipp's ZR1 disc hub. The ZR1 runs on custom stainless steel 61903 cartridge bearings for smooth, low-drag rotation and long service life between overhauls, and it's built for Center Lock rotors, with a lockring included so there's no separate adapter to track down. Zipp lists the lightest build of the full 303 SW wheelset, front and rear together, with 12mm thru-axles and an XDR driver body, at 1,440 grams; this front wheel accounts for roughly half that total rather than carrying its own published figure. Paired with the matching rear wheel, the set is rated to a 286 lb / 130 kg system weight and a maximum tire pressure of 73 psi, numbers that follow from the hookless rim's lower-pressure design rather than limit it.

What separates the 303 SW from a standard carbon disc wheel is the integrated Zipp AXS Wheel Sensor, built into the rim itself instead of clipped onto the valve stem. It reports tire pressure in real time to the SRAM AXS app, so pressure can be checked from a phone or a compatible head unit without a separate gauge or an aftermarket clip-on sensor. That matters more on long gravel days or cyclocross racing, where temperature swings and terrain changes push pressure around more than they do on a smooth road ride. For riders already running AXS shifting or a SRAM power meter, it's one more data stream living in an app they already open rather than a new one to install.

Zipp built the 303 SW for road, gravel, cobbles, and cyclocross riding, and the wheel's spec sheet supports that range: a wide, impact-resistant rim, a hub sealed for wet and gritty conditions, and pressure monitoring that earns its keep the rougher the terrain gets. For a rider stepping up from an alloy or non-hookless wheel, the combination of lower rotating weight, a wider tire base, and built-in pressure monitoring is a meaningful jump on the road or off it, not just a cosmetic upgrade. It's a front wheel for someone who wants a single carbon wheel that stays composed once the pavement ends, whether that means a mixed-surface century, a local cyclocross series, or a gravel race with a few miles of tarmac on either end. Zipp backs it with a lifetime warranty, which matters on a wheel meant to take hits.