Product InformationThe JetBlack Z2 Fluid Trainer is a high quality, smooth and quiet bicycle trainer that provides a more realistic ride feel than other trainers.The proprietary fluid in the JetBlack Z2 Fluid increases resistance exponentially up to 900 watts. The faster you spin the harder it gets! SPECIFICATIONS Size: 603 (W) x 620 (D) x 393 (H) mm 23.7 x 24.4 x 15.5 inchesSize after folding: 603 (W) x 485 (D) x 170 (H) mm 23.7 x 19 x 6.7 inchesTotal Weight: 10.82kgs/29lbsResistance System: FluidResistance Levels: Progressive road-like feelWatts: 900 at 60km/hRoller Material: AluminiumFlywheel Weight: 1.5kgs/3.3lbsCoast down time: 5+ secondsAxle Compatibility: 130mm, 135mm (QR and Boltup) 12mm x 142mm with trainer axles. Will suit most bikes with axle width 120mm and 150mmWheel Size Compatibility: 26", 27.5", 29er, 700c Some 24" bikes BENEFITS Fluid resistance curve up to 900 wattsTrainer is pre-assembled and ready to rideJetBlack SQR™ quick release system allows easy mounting and once set remembers your bike position. Set and forget!Rock-solid design is stable for any size or style of rider and the most punishing of training sessionsWide base and anti-slip feet keep the trainer still for even the toughest of ridersWheel compatibility suits road and mountain bike wheels between 700c, 29″, 27.5″, 26″ and many 24″ wheelsFolds into compact shape for easy storage and transport1 Year Limited Lifetime Warranty