MAGNETIC brake - 6 magnets, designed for 26 - 28''29'' only with slick tires5 degrees of resistance, resistance control lever on the handlebarsalloy roller (reccomended use with tires designed for trainers)steel folding frame, rear wheel fixed with 2 adjustable screwsresistance is determined by combination of setting loadand gears on bicycle depending on the speed (rpm)maximum resistance: max. res. level + highest gear + max. rpm (400 W)(optimal rotation speed: 90 - 100/ minute)designed for QR only (not for thru axle)QR is included