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 808 changed perceptions about deep-section wheels. At first, its 81mm-deep profile appeared only in time trials and triathlons. And sure enough, its early incarnations netted numerous Grand Tour stage wins and Kona IM world championships.

Still, it didn’t take long before Zipp riders discovered that the 808’s light weight, responsiveness, and solid handing are ideally suited to hilly bike legs, criteriums, field sprints, and long days off the front of the peloton.

Now, with the new Firecrest rim shape, the 808 has improved in almost every metric. Its 27mm-wide profile is 15 seconds faster than before over 40km, and now equals or exceeds the performance of any 90mm-deep rim on the market as well as many discs. At high wind angles, the 808’s aero advantage is even greater, yet Firecrest also makes the 808 remarkably stable.

Essentially, the 808 provides the speed of a much deeper rim with the handling of a much shallower one. On windy, non-disc-legal course like Kona, that counts for a lot. And in Firecrest's first crack at elite-level competition, Chris McCormack rode it to a win on the Big Island in 2010.

With its wider profile, the latest 808 Tubular also shows improved lateral stiffness for efficient power transfer and crisp acceleration, yet offers greater comfort and impact resistance than its predecessor.

Pro triathletes like Macca build their seasons around a few crucial events where aerodynamics are everything. Pro cyclists like Saxo Bank-SunGard and Peanut Butter & Co. TWENTY12 log scores of race days every year with huge variations in weather, terrain, and tactics.

No matter what approach you take, the 808 Tubular with Firecrest technology provides top-shelf aerodynamics with a remarkable versatility to take on whatever challenge you’re facing.

Note: the MAX and track versions use the 2010 toroidal rim shape and NOT the Firecrest.