Heavy Duty Spare Tire Carrier is designed for use with large tube, I-beam and aluminum trailers. Heavy duty steel carrier mounts larger spare tires. Adjustable bolts circle accommodates 4, 5, 6 and 8 lug wheels. Mounting bracket and lug nuts. Fits frames 5" to 8" Mounting hardware not included: Grade 5 hex head bolts (blot length is determined by the frame width), nyloc nuts, and washers.