We build with Powertap hubs. Electropak (computer head, chest strap, download gear) is optional. To measure power you’ll need the electropak or a compatible system (Garmin, for instance).
PLEASE NOTE! Powertap is not available as a retrofit. The hub requires different spoke hole placement. If a powertap hub is laced to a stock jet wheel the spokes WILL tear through the carbon section.
