Thule Bed Rider Pro - Attaches to Thule Bed Rider Pro (sold separately) to increase bike carrying capacity. Features • Capacity to transport bikes with 9mm quick release forks and thru axle diameters 12x100, 12x110, 15x100, 15x110 via existing 9mm skewer and new thru axle adapters • Bikes lock via 538XT cable lock accessory (sold separately) • Clears all disc brakes calipers Specifications • Max number of bikes: 1 • Country of origin: USA • Dimensions (LxWxH): 6 x 3 x 3 in • Model number: 822103 • Weight: 0.9 lb