The ultimate value in cartop fork mounts, the Prologue delivers a sleek, stylized, and most importantly secure entry level fork mount. Secure locking skewer with new intuitive grasp clamping lever. Sleek and stylized mounting head. Fits all discsuspension combinations with standard 9 mm axles. Approved for carbon fiber forks. Dual lock design, locks bike to carrier and carrier to rack. Wheel tray fits tire widths up to 2.6 inches wide w high profile rims. Carries bicycles with wheelbase up to 48 inches. Fits Thule square, AERO and Yakima load bars. Thule One Key System compatible.