Thule's 526 Circuit fork-mount bike carrier lets you transport a single bike on most aftermarket and factory roof racks. Thule provides you an aerodynamic, low-profile aluminum tray that can withstand the elements. This sleek rack supports bikes with a wheelbase of up to 48" and tires up to 2-3/5" wide. A strong, stainless steel skewer locks onto your bike's fork for a secure attachment. All Thule equipment passes tough European safety standards for car racks.