Out of Box, the 10-Speed Kickr model accepts: SRAM/Shimano 10-speed
Out of Box, the 11-Speed Kickr model accepts: SRAM/Shimano 11-speed
Requires Purchase/Installation of New Cassette: SRAM/Shimano 7/8/9-speed, Campagnolo 9/10/11-speed (also requires Campagnolo freehub adapter - sold separately)
Note for Campagnolo 11-speed Compatibility: Rear derailleur may contact a plastic cover when shifting into the largest cog on the cassette; this may prevent the use of that cog.
Weight: 47 lbs Max User Weight: 250 lbs Power Requirements: 100-240V~1.5A 50-60 Hz Resistance Type: Electromagnetic Flywheel Weight: 12 lbs Belt Type: Gates Carbon Drive Wireless Radio: Bluetooth 4.0 and ANT+ Maximum Simulated Grade: 15% (assumed rider/bike weight of 175 lbs) Maximum Power Output: 1,900 Watts (at 25 mph) Noise Level: 70 dB (measured at 3ft while riding 250 Watts at 10 mph) Footprint with legs open: 21 x 28 inches (54 x 71 cm) Footprint with legs collapsed: 21 x 9 inches (54 x 23 cm) Hub Width: 130mm (road) or 135mm (mountain) Rear Axle: Quick Release Bicycles With These Wheel Sizes Fit the Kickr: 24" RD/MTB / 650c RD / 26" MTB / 700c RD / 650B MTB / 29" RD