2" To 1-1/4" Hitch Reducer

Convert a Class III or IV hitch to a Class I or II hitch with this hitch reducer. This handy adapter is great for bicycle racks, cargo carriers or any hitch mounted accessory that requires a smaller hitch size. Simply slide the hitch reducer over a Class I or II hitch tube, secure with integrated set screws and slide into the Class III or IV hitch.

  • Aluminum construction
  • Two integrated set screws secure to hitch tube
  • 1/2" pin hole size
In Stock. Ships within 24 hrs.
1 Year Warranty Curt Fit Guide


Converts 2" Class III/IV hitch receivers to 1-1/4" Class I/II, great for bicycle racks, towing applications, cargo carriers and more! Features a 1/2" pin hole and (2) set screws to pinch the 1-1/4" hitch tube.


Reduce a 2" Class III/IV vehicle hitch to work with 1-1/4" Class I/II hitch products with the ADPT-637 Hitch Reducer, or convert 1-1/4" hitch mounted products to work with 2" receivers. Designed to fit inside a 2" hitch, this in-line hitch converter measures 4"L x 1-15/16"W x 1-15/16"H for a snug fit and includes (2) integrated set screws that pinch tight on the inserted 1-1/4" hitch tube. With both the class 2 hitch adapter, and the coupled 1-1/4" hitch tube aligned properly, they can be secured to the vehicle hitch with a 1/2" hitch pin (not included). The 1/2" pin hole is distanced 2-1/2" or 1-1/2" from center to end depending on orientation. Made with aluminum construction, finished in a smooth black powder-coat. Includes a one year warranty.

2" to 1-1/4" Hitch Reducer - Fits in-line, includes (2) set screws to pinch 1-1/4" hitch tube
2-1/2" & 1-1/2"

Product Features

  • Allows 2" Class III/IV hitch receivers to work with 1-1/4" Class I/II hitch products
  • In-line adapter measures 4"L x 1-15/16" x 1-15/16"
  • Fits inside 2" hitch receivers
  • Converts 1-1/4" hitch mounted products for use with 2" receivers
  • (2) Integrated set screws pinch on 1-1/4" hitch tube
  • 1/2" Pin hole with 2-1/2" or 1-1/2" distance from center to end
  • Aluminum construction with a black powder-coat finish
  • Hitch pin not included
  • 1 year warranty

Warning and Usage Guidelines



Instruction Manual

Review Summary