Zipp 303 XPLR SW Gravel Wheelset

The Zipp 303 XPLR SW, lightweight gravel wheels weighing just 1452 grams, featuring high-quality ZR1 hubs, 54 mm high hookless aero rims and a 32 mm rim width, approved for tubeless tyres from 40 mm width

Included

• Zipp 303 XPLR SW front wheel, Disc Centerlock, end stops for 12x100 mm thru-axle fitting
• Zipp 303 XPLR SW rear wheel, Disc Centerlock, end stops for 12x142 mm thru-axle mounting, freehub body as selected

Zipp 303 XPLR SW Disc Tubeless wheel technology:

• 28 inches / ETRTO: 622x32TSS / 700C
• Application: Gravel, Competition,
• Track width 32 mm, outer width 40 mm, rim height 54 mm
• Rims: Tubeless ready, hookless
• Hookless TSS rim, tubeless straight side
• Suitable only for tubeless tyres from 40 mm width
• Number of spokes: 24 double-crossed
• High-precision Swiss stainless steel hub bearings
• Stainless steel Sapim CX Sprint black
• Brake disc mount: Centerlock
• Zipp ZR1 Disc front hub, 12x100 mm thru-axle mount, convertible to quick-release mount
• Zipp ZR1 Disc rear hub 12x142 mm thru-axle mount, convertible to quick-release mount
• Freewheel body available as
  • HG11 freehub for Shimano 8-12-speed and Sram 8-10 PG road and gravel cassettes
  • SRAM XDR freehub for SRAM Road AXS 12-speed and SRAM MTB XG 11 + 12-speed cassettes
  • Campa ED freehub for Campagnolo 10-12-speed cassettes
• Weight: Set 1452 grams
• Maximum recommended tyre pressure: 5 bar (73 psi)
• Recommended rider weight up to 125 kg

The Zipp 303 WH-303-XPSW-A1 wheelset

has what it takes to tackle your biggest gravel challenges. And just how big? This wheelset is the fastest on gravel – not least thanks to its mega-wide rim, which combines seamlessly with approved gravel tyres.* Most gravel wheels are modified versions of existing road bike wheels, which focus primarily on stiffness and low weight. Zipp takes a different approach. On gravel, wind resistance and friction slow the rider down just as much as the vibrations from uneven surfaces. To counteract this, Zipp has specifically applied its Total System Efficiency design philosophy to the challenges of gravel. The wide rim profile increases tyre volume, allowing for lower tyre pressures without compromising stability. This means you dampen vibrations from the ground whilst maintaining the grip needed for corners and the traction for steep climbs. The rim profile also creates a seamless transition to the gravel tyres, ensuring efficient aerodynamics on gravel. And despite its width, the 303 XPLR SW wheelset remains lightweight, so you can enjoy those fulfilling days in the saddle as quickly and refreshed as possible. The Zipp 303 XPLR SW is only compatible with tyres approved for this purpose.

Zipp 303 XPLR SW Tubeless hookless rim:

The 303 XPLR rim design delivers measurably higher speeds by allowing for lower tyre pressure than previous wheelsets. A rider travelling at 32 km/h on 40 mm-wide gravel tyres saves around 8 watts at 28 psi (1.9 bar) compared to a conventional gravel wheel with 40 mm-wide tyres and 36 psi (2.5 bar)

The taller and wider rim design of the 303 XPLR S delivers better aerodynamics. At an average race speed (approx. 29–36 km/h), our internal tests at Zipp showed an energy saving of 2 watts due to improved aerodynamics compared to a competitor’s wheel. The advantage increased to 10 watts or more when speeds exceeded 53 km/h on descents and other fast sections.

The hookless tubeless rims are only suitable for use with tubeless tyres

Zipp’s patented ABLC rim profile, Aerodynamic Boundary Layer Control, reduces drag even when the wind strikes the rim at an acute angle rather than head-on. The effective usable angle range here is significantly greater than with comparable rims. This is achieved through a special effect, similar to that seen on a golf ball. This is why Zipp wheelsets feature numerous small indentations on the rim surface. In addition, Zipp utilises VCLC technology – Visco-Elastic Constrained Layer Control – whereby highly shock-absorbing, visco-elastic materials are incorporated into the carbon matrix. ZIPP’s Carbon Bridge technology uses Kevlar fibres woven into the edge area of the carbon matrix to increase impact resistance. The deep sidewalls further dampen vibrations. External spoke nipples also ensure easier maintenance without any aerodynamic disadvantage.

Zipp TSE

The Zipp XPLR Gravel wheels were developed using the Total System Efficiency approach. The development goal was to find the best possible wheel design to overcome the speed barriers encountered under realistic riding conditions. These include not only wind resistance, gravity and rolling resistance, but also vibration losses on poor road surfaces.

Zipp ZR1 Disc Centerlock Hubs:

The ZR1 DB hubset, developed in Germany, features an improved seal design and faster response thanks to the freehub body’s 66 engagement points. This hubset features an improved seal design and faster response thanks to the freehub body’s 66 engagement points. Our engineers spent more than two years developing the ZR1. Proving the hubset’s durability involved more than 58,500 km of test riding, which formed part of 3,222 hours of testing. It incorporates key technologies from the Zipp Cognition hubs. The seal design is based on Cognition, with a larger dust cap behind the freehub body and improved seals for greater protection. The bearing size is also the same as on the Cognition, although the Cognition uses premium bearings. The six pawls are staggered to operate in two groups of three. Three pawls are always engaged at any given time. This design creates a quick engagement feel with 66 engagement points. The freehub body is designed so that the pawls remain in place during disassembly to simplify maintenance. Zipp hubs are designed for use with J-bend spokes, the most popular type of spoke today.

Compatible end caps:

• Front wheel 9x100mm quick-release Mounting Part No. 11.2018.064.004
• Shimano HG / Sram XDR Rotor Rear Wheel 12x142mm Thru-Axle Mounting Part No. 11.2018.064.005
• Shimano HG / Sram XDR rear wheel 10x135mm quick-release mounting, item no. 11.2018.064.006
• Campa N3W Rotor Rear Wheel 12x142mm Thru-Axle Mounting Part No. 11.2018.069.000

Compatible freehub body for Zipp ZR1 hubs (disc and non-disc):

• HG11 Freehub Body Part No. 11.2028.065.001
• Sram XDR freehub body Part No. 11.2028.065.000
• Shimano Microspline rear wheel rotor Part No. 11.2028.061.006
• Campagnolo N3W freehub body Part No. 11.2018.065.010

Zipp spokes:

Front and rear wheels with Sapim CX Sprint stainless steel J-bend aero spokes.

Important note:

• Zipp rimless rims are NOT compatible with tyres that require a minimum pressure of more than 5 bar (73 psi). Please adhere to the minimum air pressure recommended by the tyre manufacturer, which is indicated on your tyre. Zipp rimless wheel and tyre systems should never be inflated to more than 5 bar (73 psi).
• Provided they are fitted with tubeless beads, wider gravel tyres ridden at lower pressures can generally also be used on rimless rims. If in doubt, you should contact the tyre manufacturer.
• Zipp’s tubeless rims are only suitable for tubeless tyres. Inner tubes are fine, but the tyre must have tubeless beads to ensure a secure fit.
• Zipp wheelsets with rimless rims meet existing industry standards for the dimensions that control the tyre fit. Ultimately, the tyre manufacturer determines the compatibility of its tyre with these standards. Zipp actively collaborates with tyre manufacturers on the ISO and ETRTO committees to develop uniform international standards for tubeless road bike tyres.
• Therefore, any tubeless tyre that meets these international standards should be compatible. However, tyre brands have the right to determine which products are compatible with clincher-free rims and which are not.
• If you are interested in a tyre that is not listed here, you should check with the tyre manufacturer or visit their website to find out whether the tyre is compatible with Zipp wheels.
• Zipp’s tyre pressure guide will help you determine your ideal pressure. Consider a wider tyre width if the recommended pressure for your setup is too close to 73 psi / 5 bar.
• This table is updated regularly; please check back for updates.

Hookless TSS (Tubeless Straight Side) rims:

are characterised by a hookless rim profile. Unlike hooked rims, they lack a mechanical interlock between the tyre bead and the rim flange. On hookless rims, the tyre is held in place solely by the tyre bead and the frictional forces between the tyre and the rim sidewall. On a hooked rim, the tyre is additionally secured by the mechanical interlock between the tyre bead and the rim flange. Hookless setups are more sensitive to potential deviations in system tolerances. It is therefore essential that all specifications regarding hookless compatibility provided by tyre and wheel manufacturers are followed. Adherence to the maximum tyre pressure and maximum inner rim width is crucial for the safe use of hookless rims. The maximum specifications for air pressure and inner rim width when fitting to hookless rims and rim flanges can be found on the tyre packaging.

Herstellerinformation: SRAM, 1000 West Fulton Market, Chicago, Illinois 60607, USA, https://sram.com | EU Contact: SRAM, Paasbosweg 16, 3862 ZS Nijkerk, Netherlands, https://sram.com