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ZIPP 303 NSW CL Tubeless Wheelset -2019 (XDR)

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The next evolution: the 303 NSW wheels by Zipp

The pursuit of AeroBalance™ defines Zipp’s approach to wheel design. Combining low drag performance with stable handling is their mission, because speed without control, is useless. To that end, the new NSW rim-brake wheels feature an entirely redesigned rim shape that aerodynamically integrates wider tubeless tires into the design of the most popular NSW wheels.
The NSW Carbon Clinchers now feature a 19 mm internal rim width and corresponding outer rim shape for aerodynamic optimization with 25 mm tyres. Not only are the latest versions of these wheels aerodynamically faster and more stable over a wide range of wind yaw angles than ever before—they gain even more speed thanks to the lower rolling resistance, smoother ride, improved grip, and reduced risk of flats offered by wider tubeless tyres. The tubeless rims also feature internal ridges to lock the tyre’s bead in place for secure performance over rough roads.


Application: Road, Gravel
Wheel Size: 28″
Tyre Type: clincher tyre
Number of Spokes: 18 (front), 24 (rear)
Brake Type: rim
Tubeless System: Tubeless Ready

Freehub Body Compatibility:

Shimano Freehub: 8-/9-/10-/11-speed Shimano/SRAM (Road)
Campa Freehub: 9-/10-/11-speed Campagnolo
SRAM XD Freehub: 12-speed SRAM XD-R
Note: Assembly of 8-/9-/10-speed cassettes on Shimano freehub bodies requires a 1.85 mm spacer.

Technical Information – Rim:

Type: Zipp NSW (Nest Speed Weaponry)
Dimensions (ETRTO): 19-622
Inner Width: 19 mm
Outer Width: 26.5 mm
Depth: 45 mm
Valve Hole Diameter: Presta (6.5 mm)
Material: carbon

Technical Information – Front Hub:

Type: Zipp Cognition™
Over-Locknut-Dimension: 9 x 100 mm quick release skewer
Hub Axle Diameter: 17 mm
Bearings: Swiss stainless steel
Hub Body Material: aluminium

Technical Information – Rear Hub:

Type: Zipp Cognition™
Over-Locknut-Dimension: 10 x 130 mm quick release skewer
Hub Axle Diameter: 17 mm
Bearings: Swiss stainless steel
Hub Body Material: aluminium
Freehub Body Material: aluminium
Freehub System: Axial Clutch™

Technical Information – Lacing:

Front Lacing Pattern: radial
Rear Lacing Pattern: 2-cross
Spoke Type: Sapim CX-Ray / aero
Spoke Size: 260 mm (VR), 272 mm/270 mm (HR l/r)
Spoke Material: stainless steel
Nipple Type: Sapim secure-lock
Nipple Material: aluminium

Approved For:

Weight Limit: 115 kg, rider weight
Air Pressure (max.): 8.62 bars
Recommended Tyre Width: 25 mm


– tubeless compatible for increased speed and better cornering, control and comfort
– revised ABLC™ SawTooth™ dimples
– Showstopper™ brake track to increase stopping power and help clear away water from the
– Cognition™ hubset with Axial Clutch™ technology provides reduced drag when coasting
– ImPress™ graphics technology prints graphics directly onto the rim
– fully compatible with traditional clincher tyres and tubes
– handcrafted in Indianapolis, Indiana, USA


The Zipp NSW Series is a science, a philosophy and a mission to engineer the fastest, most stable and highest performance cycling components ever realized.Within the NSW Series, Zipp will develop and refine halo-level products with our most advanced technologies on an ongoing basis. The focus is on transforming innovative ideas into tangible gains in speed. NSW – for Nest Speed Weaponry – comes from the nickname “The Nest” Zipp engineers gave to the windowless, high-security advanceddevelopment lab in the corner of the Zipp factory. It’s where only the best fledgling ideas fly.

Zipp has employed Zipp’s ImPress™ graphics technology, which prints graphics directly on the wheel, to help allow the dimples to do what they were designed to do – help control vortex shedding, the rate at which air sheds off the wheel. Managing this is crucial to stability. ImPress graphics also give NSW a distinctive stealthy look.

Zipp’s industry leading silicon carbide Showstopper™ brake track continues to evolve and improve, providing unmatched stopping power and modulation regardless of weather conditions or the length of the descent.

This patented rim shape achieves something conventional aero wheels cannot; it simultaneously reduces both aerodynamic drag and side force for the ultimate in AeroBalance™. SawTooth™ accomplishes this with ABLC dimples for improved airflow. The result is both aero-drag reduction and reduced side force at all wind yaw angles. This is important because higher wind yaw angles are where bike handling is most affected by the wind.


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