FitsMyTruckWhat fits your pickup, by truck and bed

By the FitsMyTruck team. Every figure in this guide comes from a maker, automaker or standards document named at the end, and the guide is reviewed before it goes up. How we check what fits.

Hitch receiver sizes and adapter ratings

Receiver tubes come in 1.25 in, 2 in and 2.5 in openings. CURT puts Class I and II on 1.25 in, Class III, IV and Class V Xtra Duty on 2 in, and Class V Commercial Duty on 2.5 in. A reducer sleeve fits a smaller shank into a larger opening, and CURT limits its rating to the hitch. Draw-Tite states that its 2 in to 1.25 in adapter reduces the hitch rating by 50 percent.

Which class uses which opening

CURT's hitch class table lists the opening with the class limits. The class limit is a ceiling, not the rating of a given part. CURT's Class 3 hitch for the 2019 to 2026 Silverado 1500 and Sierra 1500 (part 13393) lists 6,000 lb gross trailer weight and 600 lb tongue weight, below the class ceiling of 8,000 lb. Draw-Tite lists part 41954, a Class V hitch for the 2015 to 2026 F-150, with a 2 in receiver at 11,000 lb. Read the class definitions in hitch classes explained.

CURT classReceiver openingGross trailer weightTongue weight
Class 11.25 inUp to 2,000 lbUp to 200 lb
Class 21.25 inUp to 3,500 lbUp to 350 lb
Class 32 inUp to 8,000 lbUp to 800 lb
Class 42 inUp to 10,000 lbUp to 1,000 lb
Class 5 Xtra Duty2 in16,000 to 17,000 lb2,400 to 2,550 lb
Class 5 Commercial Duty2.5 in18,000 to 20,000 lb2,700 lb

CURT's 2.5 in guide names the F-250, F-350 and F-450 Super Duty, Silverado 2500 and 3500, and Ram 2500 and 3500 as trucks that use the 2.5 in size.

Adapters and what each maker states

PartStepLengthRating on the maker page
CURT 45411 reducer sleeve2 in receiver to 1.25 in shank4 inLimited to hitch capacity
CURT 45770 adapter2 in to 1.25 in4 in3,500 lb GTW, 350 lb TW
Draw-Tite 80300 adapter2 in to 1.25 in7 in3,500 lb, 350 lb TW; page says it reduces the hitch tow rating by 50%
CURT 45405 reducer sleeve2.5 in to 2 in5.5 inLimited to hitch capacity
CURT 45408 sleeve set3 in to 2.5 in to 2 inNot listedLimited to hitch ratings
Reese 58431 sleeve2.5 in to 2 in7 inNo GTW or TW on the page
CURT 45048 adapter2.5 in to 2 in34 in, cut to 24 in4,500 lb GTW, 450 lb TW at 34 in; 6,000 lb, 600 lb at 24 in
CURT 45785 adapter1.25 in receiver to 2 in shank6.25 in350 lb TW, not for towing use

CURT's 1.25 in guide says an adapter can reduce tongue weight capacity by up to 50 percent. Its extender guide says extenders under 12 in reduce load capacity by 25 percent and extenders over 12 in by 50 percent.

Why not stack adapters

CURT's extender guide says to abide by the lowest-rated component in the towing system, and says extenders and hitch adapters can reduce tongue weight capacity. None of the maker pages read here gives a combined rating for two parts stacked in one receiver, so no published figure exists to tow on. The one multi-sleeve product read is CURT's 45408 set, which the maker sells as a pair for 3 in to 2 in. Use one part, read its label, and size it against the tongue weight of the trailer.

The vehicle's door-jamb sticker, owner's manual and the hitch maker's labels govern. A rating shown here is the maker's published figure, not a guarantee for a specific truck.

Use it with

The hitch tables list the receiver size per part. See also weight distribution hitches for the ratings that change when spring bars are used.

Sources

Products named above

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