The three main types of bicycle racks are bumper-mounted, trunk- mounted and roof-mounted. ... This type of rack may be slightly difficult to adjust when mounting and remounting on different vehicles. ... If youa#39;re the kind of person who only buys the best, you might consider the aquot;Stratosaquot; by Specialized, or a carrier by Thule. ... If it is not assembled, make sure that easily understood directions are supplied.