The Thule Paceline 527 is a roof mounted, fork mount bike carrier, giving you the ability to carry one bicycle. The Paceline is designed to mount onto most factory or aftermarket roof racks quickly and efficiently. The 527 utilizes a precision dial, combined with an auto-clamp mechanism, allowing you to get the appropriate amount of pressure for different drop-out thicknesses. The one-handed closure allows you to load and unload your bike with one hand while adjusting the tension with your other hand. The aluminum tray makes the rack resistant to corrosion allowing it to better withstand the elements. Features a "D" shaped low profile and ratcheting wheel strap for a secure hold.