magnetically braked trainerfor wheels 26-28 '', wheels only with smooth tiresmanually operated, 7 load levels - regulation by handlebar leverfolding steel frame(recommended for use with a smooth circumferential surface for trainers)mounting a rear wheel via rychoupínací leverFe rear quick release (included),the load resistance is determined by a combination of the load settingand shift gears on a bicycle according to the speedmaximum load + heaviest transfer + the maximum speed(optimum 90 - 100 rpm)use only with quick release (not fixed axles)intended for HOBBY use, weight: 6 kg