Features: Magnetic brake - 6 magnets, designed for 26 - 28'' 29'' with slick tires only 5 levels of resistance, resistance control lever on the handlebars Alloy roller (recommended use with tires designed for trainers) Folding steel frame, rear wheel fixed with 2 adjustable screws Resistance is determined by the combination of the adjustment load and gears on the bike depending on the speed (rpm) Maximum resistance: max. res. level + highest gear + max. rpm (400W) (optimal rotation speed: 90 - 100/minute) Designed for QR only (not for thru axle) QR is included Weight: 8 kg