* 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 dont have space to spare, dont 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