Saris M2 Smart Trainer
Optional thru-axle adapter available for 142x12mm and 148x12mm 2" resistance unit roller allows for 650b, 700c, 26", 27", and 29" - up to a 2. Does not fit 650c wheel sizes, nor all 29er tires Minimum Wheel Diameter: 20" with adaptor Resistance: Electronic Adjustable Resistance: Yes Simply connect to your indoor cycling application of choice via integrated dual-band ANT+ FE-C and Bluetooth, and let the M2’s electromagnetic response system do the rest.