wheels 48 furthermore these loops 18 are made long enough to fit around multiple tires so that more than one bicycle may be carried at the same time on the bottom of the bumper strap 5 are ridged gripping surfaces 19 which may be made of rubber or similar material to prevent slippage of the bumper strap 5 in the second embodiment of the bumper strap 5 illustrated in fig9 and 10 the bicycle wheel securing loops 18 replaced by short extruded pieces 21 preferably made of metal or plastic containing two ridges 23 between which rest the bicycle wheels 48 in addition to having the locking buckle 20 to secure and tighten the bumper straps 5 this embodiment of the bumper straps 5 uses a u shaped hook 24 to hook on the bottom edge of the bumper 25 to prevent the strap 5 from slipping in lieu of the ridged gripping surface 19 of the alternate bumper strap embodiment the next component of the invention which may be used with all embodiments of the invention is the wheel strap 4 which contains a locking adjustable buckle 17 or equivalent at one end of the wheel strap 4 of which is run through the inner side of both wheels 48 as shown in fig1 a.