"808 with Powertap SL Like the tubular version, the 808 Clincher excels whenever the situation calls for an all-around wheelset with a heavy dose of aero attitude. The deep profile and 16/20 front/rear spoke count will satisfy even the most focused time trialists and triathletes, yet it's minimally affected by crosswinds and stiff enough for sprinters like CSC-Saxo Bank's J.J. Haedo. Plus, with the combination of its 82mm profile and Zipp's M2CM rim technology, the 808 Clincher is perhaps the most rugged racing wheelset on the planet, having outperformed all comers in drum impact testing in both the U.S. and Europe. The Race-Ready Powertap SL+ 2,4GHz Wireless hub advantages: The world's first-ever wireless power meter now with a stiffer 15mm axle. Now you can choose to focus on power measurement to have your best season ever