Integrated dual ANT+ FE-C and Bluetooth 4.0 technologies. Fast response electromagnetic resistance ensures most responsive resistance and maximum power available. 1500 watt peak resistance Noise level is a quiet 69 decibels at 20 mph. PowerTuned using PowerTap technology for accurate power readings. Comes on the CycleOps foldable Classic frame with spring loaded, bolt-action lever. Features clutch knob for perfect roller to tire tension each ride. 2" resistance unit roller allows for 650b, 700c, 26", 27", and 29" - up to a 2.0 tire. Precision-machined alloy roller reduces tire wear and slippage. Eccentric leveling feet allow for easy adjustment on uneven surfaces. This trainer is designed to fit common road and mountain bike frames with included steel quick release skewer and has three settings for rear dropout spacing: 120mm, 130mm and 135mm. Trainer tire recommended. Compatible with a wide variety of devices and virtual training applications, including Rouvy, Zwift, TrainerRoad and many more. Over the air (OTA) firmware updates via Bluetooth 4.0 devices ensures the Magnus is up to date. Transmits power and speed data. Some assembly required. Does not fit 650c wheel sizes, nor all 29er tires. All of our trainers are tested to the combined weight (rider and bike) of 300 lbs. Cadence sensor sold separately. ANT+ and BlueGiga USB sold separately. Not compatible with CycleOps 20/24" wheel adapter Optional thru-axle adapter available for 142x12mm and 148x12mm bikes.