* When your training takes place indoors, the Tacx Antares roller trainer lets you cycle freely to refine your coordination and technique — or just to get in a good workout.* For a more stable ride, conical rollers ensure your bike always remains in the middle of the roller.* If you don’t have space to spare, don’t worry. Antares is retractable for easy storage and accommodates different bike sizes.* Dimensions: Max: 53.0" x 18.5" (1350 x 470 mm)* Dimensions when folded: 31.5" x 18.5" x 5.3" (800 x 470 x 135 mm)* Weight: 17.0 lb (7.7 kg)* Height: 5.3" (135 mm)* Roller Diameter: 100-110 mm* Suitable Bikes: When distance between front and rear axle is 980 mm and 1100 mm