Weighing in at only 416 grams, CycleOps PowerTap SL's Shimano or Campagnolo compatible hub can be used with virtually any wheel. And because it's so lightweight, it's perfect for racing as well as training, so you're constantly gathering performance data.

Store up to 15 hours of data and unlimited intervals, with the ability to view past intervals while you're riding. And with the customizable display you'll never be more than a glance away from knowing your ride metrics. Simultaneously view power, heart rate and cadence—or mix it up further by viewing speed, distance or elapsed time. Compare heart rate to power output at any time or use the heart rate monitor off the bike for other endurance sports. The choice is yours. And so is the power to perform.

Technical Specifications

• Wireless 2.4 GHz transmission.
• USB Download.
• Coded heart rate.
• Displays and records:
• Power (current, average and max)
• Heart Rate (current and average)
• Cadence (current and average)
• Speed (current, average, and max)
• Energy Expenditure (total kjoules)
• Ride Distance (miles or km)
• Ride Time
• Programmable Odometer
• Customizable display lets you show power, heart rate and cadence simultaneously.

The 303 is a wheel you can never count out. In 2010, it became not only the first carbon wheel to win a major cobbled classic, but it won the two biggest classics of them all: Paris-Roubaix and the Tour of Flanders. The wheel is light, utterly dependable, and aerodynamic. And it's just gotten even better.

Our exploration of the 303's wider rim led to the Firecrest technology introduced last year. And now that development has come full circle, as we introduce the 303 Firecrest. The all-new wheel features Firecrest's signature shaping designed to optimize both halves of the wheel, which creates a rim that is significantly faster and also much easier to handle in crosswinds.

At just 1198 grams, the weight of the new 303 is virtually unchanged from its predecessor, and remains one of the lightest carbon wheelsets anywhere. Its 45mm-deep rim outperforms much deeper rims with a traditional v-shaped cross-section. And yet, because Firecrest technology allows us to manipulate the wheel’s center of pressure, the new 303 handles like a box-section rim. It's ultra-stable, and suitable for even the windiest days.

And because the 303's new 26.2mm-wide brake track has been optimized for wider tires, the ride quality is better than ever. Our Tangente latex tubular tires, available in 21mm and 23mm, are the perfect match for the rims.

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 our 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 and pushing the non-drive-side flange and bearing out by 7.5mm to increase overall stiffness and strength. The complete wheelsets come in two distinct colors. The stealthy Beyond Black versions feature black anodized hubs, black spokes, and black decals. The Falcon Grey wheelsets have a more classic look, with gray anodized hubs, silver spokes and white decals.