Dutton-Lainson 22128
Long U-bolt tire holder · 8, 9 or 12 in rim sizes
Zinc TUFFPLATE; mounting nuts included
Review matching listingIdentify Dutton-Lainson 22128, 22120 & 22145 Tire Mounts
Replacing a missing trailer spare-tire mount is easier once you identify the original bracket design. Dutton-Lainson's 22128, 22120 and 22145 all carry a spare wheel, but the first is a long U-bolt and the others are offset steel bracket assemblies. The supported rim sizes and frame measurements also differ.
Identify the mount by model number and shape
| 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 |
22128 (6220) is the extended U-bolt style, supplied with nuts for specified 8-, 9- or 12-inch rims. 22120 (6121) is a welded offset bracket with a 4½-inch side and 4¾-inch upward offset, suitable for the manufacturer's stated 9–14-inch wheel sizes. 22145 (6126) is a larger extra-offset bracket designed for specified 13–15-inch, 5- or 6-hole rims.
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.
What to check on the old mounting position
- Look for the full part number: 22128, 22120 or 22145. The older product-series names 6220, 6121 and 6126 can help, but use the exact manufacturer designation when ordering.
- Inspect the bracket layout: a simple U-bolt differs from the welded elevated bracket and the extra-offset bracket. Do not assume that an existing mounting plate can be reused with another design.
- Measure the trailer tongue: record actual width, height, hole locations and any obstruction near the intended mounting point. The two offset models have different stated tongue-size limits.
- Measure the wheel: count bolt holes, measure the bolt circle and record the nominal rim size. Confirm whether the wheel fits the manufacturer-specified mounting arrangement.
- Check retained hardware: the offset carriers include mounting hardware and have a locking hole; the simpler 22128 has mounting nuts. Inspect rust, distortion and fastener condition before reuse.
- Verify clearance before travel: a replacement must keep the tire away from the hull, coupler, frame components and roadway, with all fasteners installed according to the manufacturer.
Photos and exact spare-tire mount listings
These UsedRVParts catalog records are classified as Brand New. Check the exact listing for current quantity, condition and fulfillment options. Viewing or pickup of eligible parts in Kelowna is by appointment.
Dutton-Lainson 22120
Raised offset spare-tire bracket · 9–14 in rim sizes
Zinc TUFFPLATE; bracket mounting hardware included
Review matching listing
Dutton-Lainson 22145
Extra-offset spare-tire bracket · 13–15 in rim sizes
Zinc TUFFPLATE; bracket mounting hardware included
Review matching listingRelated trailer equipment
For other trailer parts rather than a spare-tire mount, see our Dutton-Lainson tongue jack identification and C.E. Smith spare carrier identification. Those guides cover different equipment and should not be used to infer hardware interchangeability.
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