points around the perimeter of the wheel this arrangement eliminates the problem of the wheel tray u201c rocking u201d on a single tangent point on the surface of the wheel as occurs with straight wheel trays the wheel tray portion is also cupped in the direction transverse to the elongate axis to stabilize the wheel against lateral movement the wheel is held in the tray portion by a ratchet strap 142 ratchet strap 142 is molded as a single piece and includes a central bridge portion 144 two toothed regions 146 and grip holes 148 at each end the ends of the ratchet strap are inserted through receivers 150 formed on each side of the wheel tray portion a spring biased pawl 152 is associated with each receiver and includes a circular pad 154 to allow a user to pivot the pawl teeth 156 formed on the pawl allow the strap to be inserted but prevent withdrawal unless the pawl is pivoted to disengage the teeth by pressing on the circular pad when the ends of the strap are inserted and pulled tight the bridge portion pushes down on the bicycle wheel to hold it against the wheel tray portion the wheel tray portion is held to a round crossbar by a clip 160 such.