303 SW – Modern Classic
Whether on the road, in Gravel use, on cobblestones or in Cyclocross races, the 303 SW wheels from ZIPP impress on any surface with their amazing performance. And not least in combination with the integrated AXS sensor for precise monitoring of tire pressure, the versatile wheelset for disc brakes is already a modern classic.
The wide rim design is based on the Gravel-specific 303 XPLR model, which not only ensures high aerodynamic efficiency thanks to an optimized transition to the tire, but also enables lower rolling resistance. In additon, wider tires contribute to reduced rider fatigue. The larger tire volume and lower tire pressure ensure a more comfortable ride by better absorbing shocks, especially in difficult road conditions.
The 303 SW wheels have always been characterized by enormous stability, but with the help of a revised carbon layup, the resistance has been increased by a further 10 %. Their special shape also protects the rims from impacts that could normally cause a puncture. At the heart of the 303 SW wheels are the ZR1 hubs, which use reliable stainless steel bearings to further improve both durability and smoothness.
Technical details of the ZIPP 303 SW rear wheel
- rim: carbon, symmetrical
- tire type: Tubeless Only
- construction: Hookless / TSS
- special feature: integrated AXS air pressure sensor
- wheel size: 28 inch (700C)
- outer width: 33.5 mm / inner width: 25 mm / profile height: 40 mm
- recommended tire width: 30 to 44 mm (optimal: 35 mm)
- hub: ZIPP ZR1, aluminum (fully machined), angled flanges
- brake disc interface: Centerlock
- bearings: Stainless steel, cartridge type
- freewheel body: aluminum
- freewheel type: 6-pawl (66 engagement points)
- installation dimension: 12 x 142 mm (thru axle)
- spokes: J-Bend (aero / ⌀ 2.0 - 2.25/1.25 - 2.0 mm)
- spoke count: 20
- spoke pattern: double crossed
- nipples: 2.0 x 16 mm
- weight: approx. 1440 g (front wheel + rear wheel; manufacturer's specification)
- max. system weight (incl. rider): 114 kg
AXS Wheel Sensor | With the system integrated into the rim, the tire pressure can be monitored and analyzed in real time without having to attach an external device to the valve stem. Fine-tuning the air pressure helps the rider to optimize their speed and performance in a constantly changing environment. Before riding, the pressure should be checked: a green light means you're ready to go. Thanks to the ability to measure the pressure while riding, problems can also be detected at an early stage.
Total System Efficiency (TSE) | Based on the simple premise "efficiency = speed", the SRAM Group introduces TSE, a solution for maximum performance in the real world, a world of imperfect roads and ever-changing riding conditions. In cycling terms, efficiency means less effort in overcoming air resistance, gravity, rolling resistance and vibration losses. The result: more speed with less power. The factors that enable a correspondingly more efficient ride are wider (Tubeless) tires, lower air pressure, an optimized rim profile and a new type of rim laminate.
Tubeless Straight Side (TSS) | Hookless Tubeless or Tubeless Straight Side describes the design of the rims. Tubeless-compatible rims can be ridden without a tube, but a setup with a tube is also possible. Hookless or Straight Side describes the shape of the rim flange, which in this case is straight and designed without the classic hook. This design offers advantages in terms of greater impact resistance of carbon rim flanges.
Notes and recommendations:
- Tire pressure: ZIPP specifies the maximum air pressure as 5 bar (73 psi). Depending on the tire width, 4.5 bar / 65 psi (30 to 34 mm), 4 bar / 58 psi (35 to 39 mm) or 3.5 bar / 51 psi (40 to 44 mm) are recommended.
- Inner tube: The use of an inner tube is possible, but only in conjunction with Tubeless tires approved by ZIPP. The manufacturer recommend the Vector R SW tires (Z30 and Z35) developed in cooperation with Goodyear, which are specially tailored to the 303 SW rims. The inner tube must also feature an appropriate threaded valve. To ensure the functionality of the AXS tire pressure sensor, the supplied Smart Tube is required.
- Warranty: ZIPP offers an unlimited warranty on the 303 SW wheels, which covers all structural damage. The AXS wheel sensor is covered by SRAM's regular 2-year warranty.
Scope of supply:
rear wheel incl. rim tape (26 mm), sealant injector, inner tube (SRAM AXS Smart Tube) and brake rotor lock ring
