Get out and explore, and do so with speed, stability, and control. It’s with this mindset that Zipp designed the 303 NSW Carbon Clincher Tubeless Disc wheel. Zipp’s 45mm rim depth proved ideal as all round wheels for cobbles, pavement, cyclocross, and gravel. Now add to that tubeless compatibility, the option to run wider tires, and the power of disc brakes.
Without needing to take into account the constraints of rim brake caliper compatibility or brake-track requirements, our engineers were able to change the NSW rim design to be more aerodynamically efficient and stable at the most common wind angles. For starters, the ABLC™ Sawtooth™ dimple design extends all the way to the rim’s edge. The result is greater AeroBalance™, our name for optimized aerodynamic efficiency and crosswind stability.
The 303 NSW Tubeless Disc-brake is optimized for wide tires to meet the performance needs of modern riders in search of low rolling resistance and high comfort. Additionally, our engineers studied the rim-to-tire interface and how specific tire and rim widths affect aerodynamic performance. With an internal width of 21mm, this wheel has proven to be fastest with a 28mm tire in the majority of wind angles.
Designed to be tubeless compatible, the 303 NSW Tubeless Disc brake wheel features a rim bed made with internal ridges to lock the tire’s bead in place. A tubeless setup allows you to run lower tire pressure for more comfort while reducing the risk of pinch flats.
All NSW rims are handmade in Indianapolis, where Zipp's engineering, manufacturing, and testing are conducted and includes "The Nest" advanced development lab where NSW was born.
Every time a conventional hubset starts to coast, friction within the freehub ratchet mechanism works like a drum brake to slow the rider down. With the Cognition Disc-brake hubset’s Axial Clutch technology, we’ve reduced this drag by disengaging the ratchet mechanism when coasting. Our testing shows that the best traditional three-pawl hub designs have twice the rotating friction as our Axial Clutch equipped Cognition rear hub, and the most popular hubsets using a similar drive mechanism as Axial Clutch were found to produce four times the rotating friction.
Zipp’s ImPress™ graphics technology has been employed, which prints graphics directly on the wheel, to help allow the dimples to do what they were design 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 wheels a distinctive stealthy look.
Zipp’s new Sawtooth dimple design consists of 12 nodes that are specifically clocked to start aerodynamic shearing at a rate of 50hz at a rider speed of 32km/hr. Sawtooth accomplishes this by inducing small sheet vortices that shed at a low magnitude, but at a higher natural frequency, thus decreasing the laminar bubble effect on the aerodynamically shielded side of the rim’s profile to further reduce high yaw drag and improve crosswind stability.
• Weight: 810g
• Hub Used: Cognition Disc rear
• Brake Interface: Centre locking – lock ring not included
• Hub Width: 135 / 142mm
• Rim Depth: 45mm
• Max Width: 28.9mm
• Internal Width: 21mm
• Spokes: Sapim® CX-Ray® J-bend
• Spoke Count: 24
• Spoke Pattern Non-Drive: 2 cross
• Spoke Pattern Drive: 2 cross
• Spoke Length Non-Drive: 266mm / J-bend
• Spoke Length Drive: 260mm / J-bend
• Max Tire Pressure: 125psi
• Max Tire Pressure: 8.62bars
• 10 or 11-speed Compatible Hub: Yes
• XDR Compatible: Yes (driver sold separately)
• Track Adaptable: No
• Dimpled Surface: Yes
• Nipples: Sapim® Secure Lock
• External Nipples: Yes
• Thru Axle Compatible: Yes
• Tubeless: Yes
• Maximum recommended rider weight: 113kg
Each Wheel Includes:
• Zipp Tangente Quick Release black skewer
• Thru-axle caps to fit 12x142mm dropouts, QR end caps are installed
• Zipp tubeless valve
• Zipp rim tape 700c x 20mm
• Freehub body spacer – 11 to 10 speed
• Zipp Cognition oil – for rear hub service
• Zipp individual padded wheel bag
• Valve core removal tool