Dutton-Lainson Spare Tire Carriers: U-Bolt vs Offset Brackets

A trailer spare tire mount must match both the wheel and the trailer frame. Dutton-Lainson offers a simple extended U-bolt style for smaller rims, a raised side-offset bracket for medium wheel sizes, and an extra-offset carrier for larger 5- or 6-hole trailer rims. These are different mounting assemblies, not merely different finishes of the same product.

Pick the mounting layout first

22128 — simple long U-boltThe 6220 holder accepts the manufacturer's specified 8-, 9- or 12-inch, 4- or 5-hole rims. Its extended U-bolt reaches around a wider tongue; mounting nuts are included.
22120 — raised and side-offsetThe 6121 bracket accommodates 9–14-inch wheels with 4- or 5-hole rims on rectangular tongues up to 3 × 5 inches. It offsets the wheel 4½ inches sideways and 4¾ inches upward.
22145 — extra-offset bracketThe 6126 carries specified 13–15-inch wheels with 5- or 6-hole rims on rectangular trailer tongues 2–3 inches wide and 3–5 inches tall. Its angled bracket helps keep the tire clear of the hull.

Dutton-Lainson spare tire carrier comparison

MPN / Model Design Nominal wheel sizes Rim holes Trailer tongue
22128 (6220) Long U-bolt tire holder 8, 9 or 12 in 4 or 5 hole rims Extra length for wider tongues; measure actual opening
22120 (6121) Raised offset spare-tire bracket 9–14 in 4 or 5 hole rims Rectangular tongues up to 3 in wide × 5 in tall
22145 (6126) Extra-offset spare-tire bracket 13–15 in 5 or 6 hole rims Rectangular tongues 2–3 in wide × 3–5 in tall
Confirm the exact wheel and tongue dimensions. Manufacturer wheel sizes refer to nominal rim diameter, not outside tire diameter. Hole count alone does not confirm wheel bolt-circle compatibility, and a rectangular-tongue specification does not mean a carrier automatically fits a round or unusually shaped trailer frame. Check clearance around the boat, coupler, winch post and ground.

All three models use a zinc-plated TUFFPLATE finish. The 22120 and 22145 are complete bracket assemblies supplied with mounting hardware and have a locking hole; the 22128 is a simpler U-bolt holder supplied with nuts, not a raised welded bracket.

Measure the trailer before ordering

  1. Measure the spare wheel: identify rim diameter, hole count and bolt circle. Confirm the mounting arrangement in the manufacturer's instructions rather than assuming any 5-hole rim fits another 5-hole carrier.
  2. Measure tongue width and height: the 22120 is intended for rectangular tongues up to 3 × 5 inches. The 22145 specifies 2–3 inches wide and 3–5 inches tall. The 22128 uses an extended U-bolt; verify its actual reach and clearances.
  3. Choose clearance and offset: evaluate how far the tire must stand away from the boat, bunks, coupler, trailer lighting and ground. The extra-offset 22145 is a different design from 22120.
  4. Check hardware included: 22128 includes mounting nuts; 22120 and 22145 include bracket mounting hardware. Any padlock or theft-deterrent cable must be selected separately where needed.
  5. Mount to a suitable structural area: follow the trailer and Dutton-Lainson installation instructions, check bolt engagement and torque, and re-inspect the bracket after travel.

Shop matching Dutton-Lainson spare tire mounts

These cards link to the exact products in the NewRVParts catalog. Orders ship from supplier warehouses, without warehouse viewing or pickup.

Related trailer equipment

Need to compare other trailer components? Visit our Dutton-Lainson tongue jack comparison and C.E. Smith spare tire carrier guide. Those guides cover different equipment and should not be used to infer hardware interchangeability.

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