The JetBlack M5 Pro is a high quality, magnetic resistance bicycle trainer. Magnetic resistance allows fine tuning of your training schedule through the combination of five levels of resistance adjustment and correct gear selection. Where a fluid trainer increases resistance according to the speed of the flywheel, a magnetic trainer can be overridden, making it suitable for recovery sessions, climbing and specifically tailored workouts. Key Features: > Fluid Resistance curve up to 475 watts. > Hydrogel Roller for less noise and reduced tyre wear. > Hydrolgel Roller reduces noise by 55%, and tyre wear by 25-30%. > JetBlack SQR™ quick release system allows easy mounting and once set remembers your bike position. Set and forget! > Trainer is Pre-Assembled and ready to ride. > Rock-solid design is stable for any size or style of rider and the most punishing of training sessions. > Wheel Compatibility Suits road and mountain bike wheels between 700c, 29\\\", 27.5\\\", 26\\\" and many 24\\\" wheels. > ide Base and Anti Slip Feet keep the trainer still for even the toughest of riders. > Folds into Compact Shape for easy storage and transport. Lowest profile of any trainer. > 1 Year Limited Lifetime Warranty