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303 Firecrest Carbon Disc Brake Wheel - Tubeless
Throughout Zipp's 30-year history, its pursuit has been speed, and with a passionately focused mindset "…to make you faster." With aerodynamics reaching a natural plateau of performance progress, Zipp ushers in a new era with the 303 Firecrest carbon wheel that looks beyond air resistance to boost efficiency across the entire wheel-system, giving you "the next chapter of speed." Designed to match with your modern drop-bar bike's increasingly ample frame clearance and the real-world challenges like gravel washboards and infrequently paved back-roads, the 303 Firecrest works to preserve energy so you can make speed.
An all-new rim design is the key to Zipp's efficiency goals. The now hookless tire bead (fitting a minimum of 28mm tires) allows the tire to sit deeper and fatter in the wheel bed, leaving the tire more flush with the rim — oddly enough, improving aerodynamics. You'll feel a more secure tire underneath you that utilizes a short-wide contact patch, improving traction and reducing tire deflection when aggressively diving in and out of turns. Essentially, the tire maintains its shape, corners better, and produces less rolling resistance with the hookless design compared to the previous generation.
Weight savings is another area of focus for the new 303 Firecrest, and to say that there have been improvements would be a little insulting. Zipp uses a more refined carbon layup and a thinner tire bed that, in addition to the hookless design, drops a staggering 300g off the weight of the previous 303 Firecrest. And with high-end modern bikes increasingly tipping over 18lb, this weight reduction has us giddy with excitement.
Keeping you fast on the bike is also about keeping you rolling forward. And if you've experienced even five-miles of bone-wrecking washboard, you know that maintaining forward speed is challenging and uncomfortable on rough terrain. The 303 Firecrest allows you to run wide gravel tires (think 50mm) with low psi, thanks to a gaping 25mm inner rim-width, helping the tire absorb the road vibrations and reducing your fatigue levels. And the newly designed ZR1 Hub engages quickly for tight riding and racing situations, as well as provides an easily removable freehub for maintenance.
- Endurance and performance lines converge in the all-new design
- Decreased weight improves responsiveness and steep-slope speed
- Increased rim widths hold wider tires to conquer rough terrain
- German-designed hub with sixty-six points of engagement
- No air compressors needed with the new tubeless rim bed
- Tubeless and tubeless compatible tires only
- Center Lock lock-rings included
- Zipp continues to expand the capabilities of the modern wheelset
- Item #ZIPZ04H
- Rim Material
- carbon (UD fiber finish)
- Wheel Size
- Tire Type
- Rim Depth
- Rim Width
- [internal] 25mm, [external] 32mm
- Brake Compatibility
- disc (center lock)
- ZR1 DB
- Front Axle
- TA 12x100 (end caps included)
- Rear Axle
- TA 12x142 (end caps included)
- Spoke Nipple
- Spoke Count
- Claimed Weight
- [front] 613g, [rear] 739g
- Recommended Use
- cyclocross, gravel, road cycling
- Manufacturer Warranty
- limited lifetime
What do you think about this product?
October 23, 2020
- I've put it through the wringer
- True to size
- Size Bought
- 6` 4"
- 200 lbs
I have been riding these wheels for about two months now and I feel that I can provide some insight into how they perform. Installation: After receiving the wheels I installed a pair of 28 mm SCHWALBE Pro One Evolution tires. The tires mounted without the need for an air compressor and inflated with a floor pump. Both wheels showed some leakage around the valve stems initially but this quickly sealed when the Stan’s sealant was injected and there were no issues with their holding air subsequently. This is the 5th tubeless installation that I have performed and it was by far the easiest. Performance: I was initially skeptical regarding the tire pressures recommended by Zipp for these wheels. For a rider of my weight, around 200 pounds, pressure of 65 psi in the rear and 60 psi in the front are recommended. As it turns out these pressures work very well. The 28 mm tires have taken on a very low and wide profile and dampen vibration and grip well with no squirming suggestive of inadequate inflation. After about 800 miles of riding I have had zero punctures. The freewheel is loud and I like the sound. There have been no issues with the hubs so far. Initially the bearings seemed sluggish, but after a few hundred miles they spin well. The wheels have remained true despite some punishment and appear to have been built well. I am unable to comment on the claims regarding power savings due to the improved compliance but I will say that the wheels feel fast. This is especially noticeable on chipseal roads and broken road surfaces, where there is a sensation of giving up less energy to the road than with other wheels that I have used. The wheels perform well in crosswinds despite their medium depth. Overall impressions: I think that this is an excellent wheelset and a great choice for the type of long distance riding that I do, where the compliance is very much appreciated. They look great. They are not inexpensive but I think that they are a good value given the quality and should last for many years.
October 20, 2020
How do we order these with QR release skewers? How do we order these with the disc rotors attached?
September 13, 2020
Are these the new 303 S wheels?