Zipp 303 Firecrest Carbon 24R road front wheel

Light enough to fly up climbs, tough enough to excel in the cobbled classics, and with the industrys best available braking performance for the most technical descents, the 45mm deep 303 NSW is built for a singular purpose: To be fast, everywhere.
Built on the foundation laid by Firecrest, offering unrivaled crosswind stability and the most aerodynamically efficient rim design on the market, the 303 NSW takes it all to the next level. Like its siblings, 404 NSW and 808 NSW, our top engineers in The Nest advanced development lab incorporated improved aerodynamics, industry leading braking performance, and reduced rolling friction to produce the lightest, highest performance 303 wheelset Zipp has ever made.
Because the toughest roads often experience the toughest weather conditions, weve included Zipps Showstopper? brake track for braking performance that delivers the best modulation and shortest stopping distances in wet and dry conditions. And weve improved aerodynamics with our ABLC Sawtooth? technology and Impress? graphics to produce a rim that is as fast as it is stealthy


Specifications:

- Set Weight 1425g
- Max recommended rider weight 250lbs

Front Wheel:
- Weight: 640g
- Rim Used: X45NSW
- Hub Used: Cognition
- Rim Depth: 45mm
- Brake Track Width (center): 26.40mm
- Max Width: 28.50mm
- Internal Width: 17.25mm
- Spokes: Sapim® CX-Ray
- Spoke Count- 18
- Spoke Pattern: Radial
- Spoke Length: 260mm
- Max Tire Pressure: 125psi
- Max Tire Pressure:8.62bars
- Track Adaptable: No
- Dimpled Surface: ABLC? SawTooth?
- Nipples: Sapim® secure-lock
- External Nipples: Yes

Rear Wheel:
- Weight: 785g
- Hub Used: Cognition
- Rim Used: X45NSW
- Rim Depth: 45mm
- Brake Track Width (center):26.40mm
- Internal Width: 17.25mm
- Spokes: Sapim®: CX-Ray
- Spoke Count: 24
- Spoke Length Non-Drive: 270mm
- Spoke Pattern Non-Drive: 2 Cross
- Spoke Pattern Drive: 2 Cross
- Spoke Length Drive: 268mm
- Max Tire Pressure: 125psi
- Max Tire Pressure: 8.62bars
- 11-speed compatible hub: Yes
- Track Adaptable: No
- Dimpled Surface ABLC?: SawTooth?
- Nipples Sapim® :secure-lock
- External Nipples: Yes
- XDR Compatible: Yes


Technology:

- Showstopper?: Showstopper? is a complimenting pairing of a directional, molded-in, texture with silicon carbide particles suspended in the surface resin. The current media blast process applied to all Zipp rims increases the surface roughness of the brake track providing the rider with consistent and responsive braking. In order to improve this for the wettest of rides, we have introduced a molded-in groove specifically tuned for the Zipp Tangente Platinum Pro EVO Brake Pad.

- ImPress?:we´ve employed Zipp?s ImPress? graphics technology, 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 a distinctive stealthy look.

- ABLC? SawTooth? Technology (Aerodynamic Boundary Layer Control): Our 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 20mph. 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.

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