Designed to secure down fat and plus-sized tires in the range of 3 to 5 inches wide, the Thule UpRide Fatbike Adapter replaces the skinnier wheel holders that come stock on your UpRide Bike Carrier. They secure directly in place where the previous wheel holders resided, offering a wider, more stable platform for the voluminous rubber found on fat and plus-sized bikes. Includes a pair of UpRide Fatbike Adapter wheel holders for both ends of your bike.