Smart trainer, trainer tire, leveling block The Nitty Gritty Wheel-on smart trainer compatible with Zwift, Rouvy, TrainerRoad and many other training apps. Connects wirelessly via dual-band ANT+ FE-C or Bluetooth 4.0 Simulates up to 1500 watts at 20 mph Whisper quiet at 69 decibels at 20mph Integrated speed, cadence and power sensors eliminate the need for extra external sensors 2" resistance unit roller allows for 650b, 700c, 26", 27", and 29" - up to a 2.0 tire. The Saris CycleOps M2 Smart Indoor Bike Trainer The Do-It-All Smart Trainer Capable of replicating any workout thrown its way, the M2 smart trainer can handle up to 1500 watts at 20 mph and a 15% climbing grade. Simply connect to your virtual training software of choice via integrated dual-band ANT+ FE-C and Bluetooth, and let the M2's electromagnetic response system do the rest.