Some equipment makes your bike faster. Some makes you faster. CycleOps’ lightweight, 446-gram PowerTap PRO Hub does both. It makes the most of your time on the bike, telling you exactly what you’re doing so you can nail your intervals, stay within your targeted zones for long rides and track your Training Stress Score (TSS) and Chronic Training Load (CTL) for long term gains. The low-profile PRO hub is stiff from wide flanges, accurate to within +/-1.5% and is ANT+ capable for use with your favorite compatible cycling computer. Plus, all the electronics are held within a small, easily removable outer cap.