- Zipp 303 Firecrest Clincher Rear (Beyond Black) 2013
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Zipp 303 Firecrest Clincher Rear (Beyond Black) 2013
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|Carbon||Shimano / Sram Freehub|
This clincher rear wheel is the New stealthy 'Beyond Black' version and features black anodised hubs, black spokes, and black decals.
Top Features of the Zipp 303 Firecrest Clincher Rear (Beyond Black) 2013
- Tyre Bead Inside to Inside: 16.25mm
- Brake Track Top: 23.34mm
- Brake Track Bottom: 28mm
- Recommended Tyre Width: 23-32mm
- Max recommended rider weight: 225lbs
- Weight: 818g
- Rim Used: x45
- Hub Used: 188
- Rim Depth: x45mm
- Aero Width: 28.5mm
- Nominal Tyre Bed Width: 17.25mm
- Spoke Count: 24
- Spoke Length Non-Drive: 258mm
- Spoke Pattern Non-Drive: Cross
- Spoke Pattern Drive: Radial
- Spoke Length Drive: 246mm
- Max Tyre Pressure: 125psi
- Track Adaptable: No
- Dimpled Surface: Yes
- Ceramic Bearing: After-market
- External Nipples: Yes
|Wheel Size:||700c (622)|
In the past two years, the 303 has emerged as one of the most formidable wheels in the Pro Peloton, with wins in the Tour de France, Paris-Roubaix, the Tour of Flanders, and more. Its speed, light weight, and utter reliability have been proven in pro cycling's most demanding races.
The 303 has been completely redesigned with Firecrest shaping. The Carbon Clincher preserves the aerodynamic advantages of its tubular brother, while adding the convenience of a clincher tyre. And at just 1498 grams, it's light enough to climb up the steepest gradients with ease.
All of the hallmark characteristics of the 303 have improved with the Firecrest Carbon Clincher. The Firecrest shaping optimizes the aerodynamic profile of both the front half and the back half of the wheel. In addition, Firecrest moves the centre of pressure of the wheel backwards, giving the 45mm-deep rim the crosswind stability a box-section rim. At the same time, the 26.2mm-wide brake track allows the clincher tyre to take on a wider, more stable shape without compromising rolling resistance. It's faster, simpler, and more stable.
The new wheels retain all the small details that make Zipp wheels what they are. Exposed spoke nipples sit in the aerodynamic shadow of the rims, keeping serviceability simple without compromising speed. And the signature ABLC™ rim dimples squeeze every last second of performance possible. To complete the package, Zipp has refined its venerable 88/188 hubset, reshaping the hub body, canting the non-drive side flange by 8 degrees and moving the bearing out by 7.5mm to increase overall stiffness and strength.
|Zipp Firecrest Rim Technology|
|Firecrest - a better wheel in every way|
For every rider, every discipline, and every ability level, aero wheels make a difference. Every test we’ve ever run has confirmed this basic truth and we’ve never seen data from anyone else that argues differently.
With the new Firecrest rim shape in our 404 and 808 Tubulars and Carbon Clinchers, Zipp wheels make a bigger difference in more ways than ever. Not only is Firecrest more aerodynamic than any other rim design, it improves handling in crosswinds, wheel strength, and overall ride quality.
Discovered as we developed our carbon clinchers, Firecrest refocused our thinking from the front to the back of the wheel. Previous rim shapes were designed to smooth airflow coming off the tyre, and tapered inward from the widest point of a toroidal bulge. But Firecrest rims have a less pronounced bulge and maintain a near-constant width almost all the way to the spoke bed.
Without giving up the proven benefits of the toroidal shape, Firecrest is the first aero profile that effectively controls airflow around the back half of the wheel. The performance benefits are substantial. With Firecrest, the latest 404 Tubular (58mm rim depth) matches the aero performance of the pre-Firecrest 808 (81mm depth). And the new 808 Tubular is faster than any competitor’s 90mm rim.
During the design process, we realised that the advanced mathematics and massive computing power that helped us create a faster wheel could also help reduce the impact of crosswinds on handling. Using computational fluid dynamics (CFD), we’ve discovered subtle variations in rim shape that improve stability without increasing aerodynamic drag. By moving the center of pressure – the focal point of side forces on the rim – to its optimal location near the steering axis, Firecrest offers stable, predictable handling at every wind angle. In real-world conditions, Firecrest rims are markedly more stable than other rims of equal or even shallower depth.
As we discovered with designs like the Paris-Roubaix-winning 303, a wider rim increases lateral stiffness for sprinting and cornering yet offers greater vertical compliance for more control, comfort, and durability on rough surfaces. The same holds true for Firecrest rims. In both tubular and clincher versions, the wider design better protects tyres and places more rubber on the road while cornering without adding rolling resistance.
About the Zipp brand
Zipp Cycle Components are the producers of wheels, handlebars, cranks and cycle accessories are a manufacturing company located in Indianapolis, Indiana, USA and are part of the growing SRAM group. Zipp Speed Weaponry serves a select group of elite companies and athletes, globally located and committed to bicycle and wheelchair competition. Zipp meets the customer's needs for the highest performance, superlative quality components through innovative design and manufacturing utilising the best material and technology available. Zipp is built on mutual respect, delivery on promise and fastidious attention to manufacturing details.
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