Technical Specifications * Wireless 2.4 GHz transmission with Ant+Sport * Alloy axle * Carbon/alloy hubshell * USB download * Coded heart rate * Hub weighs a mere 412 grams * Available as a road hub with hole counts of 20, 28, 32 (available in silver), and 24 (available in silver or black) * Available as a mountain bike hub and mountain bike disc brake hub with a 32-spoke hole count * Patents issued and pending * Displays and records: o Peak Power o Time in Zones o Power (current, average, max.) o Heart rate (current, average) o Cadence (current, average) o Speed (current, average, max.) o Energy expenditure (total kjoules) o Ride distance (miles or km) o Ride time o Programmable odometer