The Elite Arion Parabolic Rollers are a great way to dial your balance and cycling line to ensure your efficiency. The Arion\\\'s tough thermoplastic frame is strong, lightweight and also allows you to fold for east storage and transportation. It however, retains key features such as a built in step for easy rider mount and dismount. The roller system improves balance and form, which builds strength, with a parabolic roller drum profile for increased confidence. The rollers feature full sealed bearings which run quietly and smoothly to allow for a pleasant ride. The rollers do not feature the internal resistant unit but still holds the fundamental features that help you to the top of your game. Key Features > ARION is compatible with both road and mountain bikes wheels > The front roller is adjustable with 10 different positions to allow for perfect compatibility with the frame of the bike you\\\'re using > Light and easy to transport, ARION is quickly and easily foldable with one simple movement, so it reduces clutter by 50% when not in use > 85 mm diameter at the centre and 100 mm at its ends. The wheel is constantly being directed towards the centre of the roller, thus making it easier to control pedalling smoothness and in turn your bike > The typical parabolic shape of roller\\\'s ends instantly guide the bike towards the centre of the home trainer