Zipp 303 S Rear Wheel

SPEED FOR ALL ROADS AHEAD

Zipp's 303 S Series Tubeless Disc Brake wheelset provides today's cyclists the versatility they demand with the speed they crave. Expanding greatly on its heritage of conquering the Spring Classics, this 303 wheelset maintains its ideal-for-every-terrain 45mm rim depth but adds a significantly wider internal width to provide greater performance and ride quality in almost every measurable way. Road bikes are more versatile than ever, no matter the road surface, but just as fast as before. The 303 S offers an entirely new rim profile and design to optimize rider performance on this new breed of bike. This wheelset is tubeless for disc-brake bikes, allowing the ability to run wide tires at lower pressures for race-ready speed on or off the pavement. The 303 S is among our lightest wheelsets, optimized for top aero performance with a 28mm tire but capable of handling gravel tires up to 50mm wide. The 303 S Series borrows design concepts from the higher-level 303 Firecrest Tubeless Disc-brake wheelset to gain speed through increased efficiency. That is achieved by creating a wheel with reduced: Wind resistance, rolling resistance, rider fatigue, and weight. The key innovation is in the 303 S Series' rim design. Its 45mm rim depth is the same as its predecessor, the 302 Disc brake. But its rim width is 2mm wider, at 27mm, and its tire bed is a full 7mm wider, at 23mm. That rim platform is designed to be the fastest with a 28mm tire. The wide rim optimizes tire profile to allow lower tire pressure. That helps to reduce rolling resistance and provides a more compliant ride. The result of all this is a 10 percent watt savings vs. a top peer wheel in total power required to ride 40kph on a smooth flat road with a 28mm tire, according to internal Zipp testing. This groundbreaking wheelset also features all-new cosmetics, setting the rider apart from the pack, and comes at an attractive price.

FEATURES

• New Zipp graphics and cosmetic identity that scream speed
• Fastest with 28mm, fits wide gravel tires as well
• 76 / 176 DB hubs with Center locking interface
• XDR driver body option
• Wide rims optimize tire profile to allow lower tire pressure, especially with tubeless. The result is a larger contact patch for increase grip for confident cornering, descending, and handling in wet conditions.
• Lower tire pressures and larger volume provides a compliant ride with fewer vibrations.
• Significant watt savings when running larger tires at lower pressure.
• Wide hookless rims create a seamless transition to the tire, reducing drag.

SPECIFICATIONS
Orientation (wheels): Rear
Size (wheels): 700c
Rim construction: Carbon
Tire compatibility: Clincher Tubeless Ready
Rim depth: 45mm
Surface texture: Smooth
Brake compatibility: Disc (Center Lock)
Rim - inside width: 23mm
Rim profile: Symmetrical
Rim finish: UD fiber / Bake-On labels / Matte clear coat
Color (Decal): Standard
Nipple material: Brass
Nipple anti-rotation: Sapim Secure-Loc
Spoke type: CX-Sprint
Spoke count: 24
Spoke pattern: 2 Cross
Hub: 176D
Driver body type: SRAM/Shimano Road
Color (hub): Black
Axle type (Wheels): TA 12x142
Axle material: Aluminum front & rear
Bearings: Cartridge - Stainless Steel
Driver Mechanism: 3 Pawls Leaf Spring
Driver body material: Aluminum
Max tire pressure: 73psi
Max recommended rider weight: 250lbs

UK delivery

If your item is in stock and ordered before 12pm, we will do our best to despatch your order the day you place it. In busy times we tell you how long it will take us to process it.

The above does not apply to bikes, which we have to assemble and inspect before repacking for dispatch. Typically we try to have bike orders dispatched within 3-5 days, but in busier times it may take longer. In those cases we'll let you know of longer than expected delivery times.

Please bear in mind that we are closed on Wednesdays, so no items will be dispatched then.

Free postage over £40

For small items we use Royal Mail's 48 service which has a delivery time of typically 2-3 days from dispatch; though you do have the option to upgrade to 24 which is generally next-day from dispatch if you require your order sooner. Please note in some cases the item will need to be signed for, so please provide an address where someone will be in.

Orders of over £40 will qualify for free standard postage with Royal Mail 48. This may exclude certain bulky or awkward items which will be calculated automatically at the basket screen.

Bike shipping

When we send out a larger parcel such as a bike or trailer we use a next-day courier - usually either DPD or Parcelforce.

For these reasons please supply us with a delivery address where there will be someone in to sign for your parcel. If there is nobody in when the couriers call, they will leave a card. You can then phone them to arrange delivery for another day or collect your goods from your local depot (a photo ID with proof of address will be required).

How will my bike be delivered?

We fully assemble, safety check and inspect every bike as though you were going to ride it away from our showroom.

However, to get it back into a box suitable for a courier to handle, we have to remove the pedals, handlebar and usually the front wheel - so some minor reassembly is required when the bike is delivered to you.

Please bear in mind that you might need a 15mm spanner for the pedals (adult's bikes generally do not come with pedals included, so you may not need to worry about this), and 4mm, 5mm and 6mm allen/hex keys for the reassembly.

Outside the UK

Since Brexit it is no longer feasible for our website to have permanent shipping prices for international delivery. Instead, if there is an item you are interested in, please Contact Us with a full delivery address and we will quote for delivery.

All the prices on our website and catalogue are in pounds sterling and are inclusive of VAT, but VAT will be removed for international orders. Please bear in mind that you will likely have to pay your country's taxes, import duties and associated courier handling fees for any items.