PowerTap SL+ Rear Hubs are pro level power measurement hubs featuring a carbon/alloy hub shell and wireless transmission. The SL+ hub weighs 412 grams.
Features and Information
SL+
Wireless 2.4 GHz transmission with ANT+Sport
15mm alloy axle with Carbon/Alloy Hub Shell
Must purchase Compatible Electro-Pack and skewer separately
2009 CPU's will work with current and older hubs but 2009 hubs will not work with older CPU's