Thule continues to push the bike carrier envelope with this new upright. Rack level dial activated clamp, push button clamp release, and sleek sculpted wheel tray. Please, no staring. Easy bike loading: sculpted wheel tray and support arm clamp work together and help keep bike in position when securing to carrier. Simple to use rack level adjustment dial closes clamp around bike tube for ultimate transport stability. Unloading the bike is a breeze with fast, push button clamp release. Low profile wheel tray and dual action wheel strap fits all tire sizes without the need for a wheel adaptor. Accommodates bike frames up to 3 38 in diameter. Fits Thule and Yakima load bars.