Today were going to review the the Thule Doubletrack platform style bike carrier part number TH990XT. The Doubletrack is designed to work with both 1 -inch and 2-inch trailer hitches. Theres an adapter sleeve that youll need to use for 2-inch trailer hitches but it can be easily removed using one Allen bolt to adapt to 1 -inch hitches. Its high strength steel construction will support weight… see more >