What happens when you pair a speed sensor with a #1 best-selling bike trainer? You get a combo that’s ready for any virtual – or non-virtual – training ride. It’s the ideal setup for budget-conscious athletes looking to join fun, virtual communities, like Zwift, without a traditional smart trainer.Simply install the magnetless speed sensor on the rear wheel of your bike, mount your bike to the solid Fluid² trainer with our innovative clutch knob, connect to your indoor cycling app of choice via Bluetooth or ANT+ and voilà! - you’re ready to sweat.Product Features: Fluid resistance unit provides a quiet and consistent ride., Progressive resistance offers the widest resistance range and road-like feel., Included speed sensor connects you with Rouvy, Zwift and other indoor cycling apps., ANT+ USB and BlueGiga USB sold separately.,.In the box: Fluid² Smart Equipped Bike Trainer, Dual-band magnetless speed sensor,.Specifications: Noise level at 20 mph is super quiet 64-68 decibels., Large, individually precision-balanced flywheel allows for improved road-like feel., Self-cooling mechanisms including a patented fan design keeps the unit performing better, longer., Eccentric leveling feet allow for easy adjustment on uneven surfaces., Comes on the foldable Classic frame with spring loaded, bolt-action lever., Precision-machined alloy roller reduces tire wear and slippage., Features clutch knob for perfect roller-to-tire tension each ride., 2\" resistance unit roller allows for 650b, 700c, 26\", 27\" and 29\" wheel sizes – up to a 2.0 tire., 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., Trainer is tested to the combined weight (rider and bike) of 300 lbs., Optional thru-axle adapter available for 142x12mm and 148x12mm bikes., Formerly branded as CycleOps Fluid² Smart Equipped.