The 77/177D hubset is the perfect compliment for the leading aerodynamics, ride quality, stability and rim strength of Zipp’s Firecrest rim technology. That means you get the unmatched performance of the 45mm-deep 303 Firecrest rim

and Zipp’s groundbreaking Carbon Clincher technology, with its exceptional reliability, handling and aerodynamic performance with the added convenience of a clincher.

And when it’s time to scrub off speed or stop, you won’t have to tense up and ‘grab a handful.’ You have the consistency and power of disc brakes – precision modulation and stopping power is at your fingertips. On top of that, the revised 303 Firecrest Carbon Clincher Disc-brake wheelset is 35 grams lighter than its predecessor.

You’re at the helm of a serious Speed Weapon that helps speed up and smooth out even the most chaotic courses. That’s true even when the conditions and terrain get crazy… cyclocross, gravel roads… lonely pave (or not) lanes… even urban assaults. Jeremy Powers (Rapha-Focus) and the Giant Factory Off-Road Team raced Zipp 303 Firecrest Disc-brake wheels with new 77/177D hubset to great success this season, including Power’s 2015 U.S. national championship victory.

The 303 Firecrest Carbon Clincher Disc-brake wheelset comes with a standard 10/11 speed driver body for SRAM®/Shimano® or for Campagnolo®, allowing you to run a wide range of cassettes. For those looking for a wider gear range, or tackling especially extreme terrain, a SRAM XD driver body for 177D (sold separately) is easily installed to allow for more cassette options. A 1.85mm spacer is included with the XD driver body and is required for use on the 177D hub. XD driver body compatible with 11-speed cassettes only.

About 303 Firecrest rim technology:

In developing the original 303 wheelset, Zipp discovered that a wider rim increases lateral stiffness for sprinting and cornering while also providing greater vertical compliance for greater control, comfort and durability. That wider rim profile led us to develop our Firecrest technology, which revolutionized aerodynamic efficiency and stability for carbon wheels. The proprietary Firecrest rim shape optimizes the aerodynamic profile of the front half and – here’s the revolutionary part – the back half of the wheel. Firecrest moves the wheel’s center of pressure to be more in line with the steering axis for stability in even the stiffest crosswinds.

The 303 Firecrest Carbon Clincher Disc-brake wheelset comes with two decal options, the stealthy Beyond Black or the distinctive Classic White decals. Both decal options feature black anodized hubs, black spokes and black nipples.

Each wheel includes 2 sets of Zipp thru-axle end caps, 1 Zipp skewers, 1 rolls of Zipp rim tape 700c x 20mm and 1 Zipp valve extenders. Rear wheel includes 1.85mm spacer for use with 10-speed cassettes.

• Set Weight 1645g
• Max recommended rider weight 250lbs
• Front Wheel
• Weight 760g
• Hub Used 77D
• Hub Width 100mm
• Rim Depth 45mm
• Brake Track Width (center) 26.4mm
• Max Width 28.5mm
• Spokes Sapim® CX-Ray®
• Spoke Count 24
• Spoke Pattern 2 cross
• Spoke Length Drive 272mm
• Spoke Length Non-Drive 270mm
• Max Tire Pressure 125psi
• Max Tire Pressure 8.62bars
• Track Adaptable No
• Dimpled Surface Yes
• Nipples Sapim® Secure Lock
• External Nipples Yes
• Thru Axle Compatible Yes
• Rear Wheel
• Weight 885g
• Hub Used 177D
• Hub Width 135mm
• Rim Depth 45mm
• Brake Track Width (center) 26.4mm
• Max Width 28.5mm
• Spokes Sapim® CX-Ray®
• Spoke Count 24
• Spoke Length Non-Drive 272mm
• Spoke Pattern Non-Drive 2 cross
• Spoke Pattern Drive 2 cross
• Spoke Length Drive 270mm
• Max Tire Pressure 125psi
• Max Tire Pressure 8.62bars
• 11-speed compatible hub Yes
• Track Adaptable No
• Dimpled Surface Yes
• Nipples Sapim® Secure Lock
• External Nipples Yes
• Thru Axle Compatible Yes
• XD Driver Body Compatible Yes

The 303 Firecrest Carbon Clincher Disc-brake wheelset combines that innovative disc-brake-compatible technology with the credibility and heritage of one of Zipp’s most acclaimed wheelsets, the 303. The 303 Firecrest and its pioneering predecessor, the 303, have been ridden to victory in multiple editions of the two toughest cobbled classics, Tour of Flanders and Paris Roubaix, as well as a multitude of cyclocross victories and even a mountainous Tour de France stage in wet, miserable conditions.

In developing the original 303 wheelset, Zipp discovered that a wider rim increases lateral stiffness for sprinting and cornering while also providing greater vertical compliance for greater control, comfort and durability. That wider rim profile led us to develop our Firecrest technology, which revolutionized aerodynamic efficiency and stability for carbon wheels. The proprietary Firecrest rim shape optimizes the aerodynamic profile of the front half and – here’s the revolutionary part – the back half of the wheel. Firecrest moves the wheel’s center of pressure to be more in line with the steering axis for stability in even the stiffest crosswinds. All of that innovation along with the precision control of disc braking gives you a wheel that’s as smooth as it is tough.

The 303 Firecrest Carbon Clincher Disc-brake wheelset comes with two decal options, the stealthy matte Black or the distinctive matte White decals. Both decal options feature black anodized hubs, black spokes and black nipples.