With the Antares roller you can cycle freely to refine your coordination and technique. This roller can be retracted to 80 cm. The Tacx rollers have conical rollers which ensure that your bike always remains in the middle of the roller while you are riding. This makes riding on the rollers easier and safer. SpecificationsType of trainer Roller Roller diameter 100-110mm (3.93-4.33in) Suitable bikes Maximum distance between front and rear axle is 1100 mm, All bikes with a wheel diameter of 26 to 29 in Max footprint 1350 x 470 mm (53 x 18.5 in) Height 135 mm (5.31 in) Dimensions when folded 800 x 470 x 135 mm (31.5 x 18.5 x 5.31 in) Weight 7.7 kg (17.0 lbs)