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303 S Carbon Disc Brake Wheel - Tubeless
Throughout Zipp's 30-year history, its pursuit has been speed, 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 S 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 S works to preserve your energy so you can make speed.
An all-new rim design is the key to Zipp's efficiency goals and replaces the 302 in Zipp's lineup. The now hookless tire bead (fitting a minimum of 25mm 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 S. Zipp has dropped 150g, compared to the 302 wheelset. And with high-end modern bikes increasingly tipping over 18lb, this weight reduction is highly advantageous in competitive events.
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 S allows you to run wide gravel tires (think 50mm) with low psi, thanks to a wide 23 mm inner rim-width, helping the tire absorb the road vibrations and reduce fatigue levels.
- Endurance and performance lines converge in the all-new design
- Aerodynamically optimized for road, but can run wide gravel tires
- Decreased weight improves responsiveness and steep-slope speed
- Updated graphics are asymmetrical and eye-catching
- Tubeless and tubeless compatible tire only
- Zipp continues to expand the capabilities of the modern wheelset
- Item #ZIPZ04L
- Rim Material
- carbon (UD fiber finish)
- Wheel Size
- Tire Type
- clincher, tubeless
- Rim Depth
- Rim Width
- [internal] 23mm, [external] 27mm
- Brake Compatibility
- disc (center lock)
- 76/176 DB
- Front Axle
- TA 12x100
- Rear Axle
- TA 12x142
- Spoke Nipple
- Spoke Count
- Claimed Weight
- [front] 1lb 9.1oz (711g), [rear] 1lb 12.9oz (819g)
- Recommended Use
- cyclocross, gravel, road cycling
- Manufacturer Warranty
- limited lifetime
What do you think about this product?
April 10, 2021
- I've used it several times
- True to size
- 5` 5"
- 220 lbs
I was a little scared at first about the hook-less rim but they are amazing.... you can feel the difference from the moment you mount them. and even up top! After so much research, these are going to be the wheels of the future. they also look amazing! I went with 26's and they roll amazing! Zipp will never disappoint you!
February 8, 2021
Best bang for the $$!
- I've used it several times
Are you in the market for a nice all-around carbon wheelset that doesn't cost an arm and a leg? Well, here it is. These are the perfect wheels for your road or gravel bike. You could spend another $1000 dollars of your hard-earned money to save 100g but I think you'd be better off putting that money elsewhere. These are hookless rims so not all tire brands will be compatible. Check with ZIPP before mounting your fav tire brand: https://support.sram.com/hc/en-us/articles/360050355593-What-tubeless-tires-are-compatible-with-Zipp-s-hookless-rims- But that means you can run lower pressures for a nice supple ride. Check out this helpful pressure guide from SRAM: https://axs.sram.com/guides/tire/pressure If you have any specific questions about this wheelset let me know!
March 21, 2021
This might be a dumb question but the website does not specify, when you purchase this is this a pair or individual rims?
January 9, 2021
Nice wheels at nice price
UPDATE: I am sorry to blemish the overall rating but I'm dropping from 5 to 4 stars. I still think these are great and I still recommend them. But a few issues now that I have used these a while. 1) The hub bearings in the rear wheel already started failing around 5 months in, and my LBS just had to replace them. 2) The freehub is one of those designs where it is held on by a friction seal, so you can pull off the cassette and freehub together by lifting up. This is a feature, and not a defect. Just be aware that you cannot simply push the cassette back on, as the seals will not seat properly. You need to remove the cassette from the freehub body first, apparently, in order to maneuver the seals properly. It probably is a more secure seal system that you cannot simply push it back on, but it is a bit of a hassle. 3) Do take note of the Gearhead point above, that not all tubeless tires are compatible with these. I tried with my LBS to mount some popular GravelKing SK and they just would not seat properly. Original: 5 stars for the overall brand reputation, looks, ease of use, price, and quality so far. The new graphics are nice and subtle. The tubeless setup worked perfectly for me the first time. My 40mm gravel tires were easy to put on and seat with a home canister-type hand pump. I like that these are suitable for gravel or road (w/disc brake setup). If you're scrutinizing the tech specs, the freewheel hub engages "slower" (cranks turn X degrees further to engage) than some other wheels of this type, but not something I am conscious of while riding.
November 10, 2020
Hello! The overview states "Tubeless and tubeless compatible tire only"- can you confirm this will work with tubes/clinchers? I see you have clincher stated in the specs but just want to double check. Thank you!