CURT receiver reducer sleeve for 2-1/2" receiver to 2" shank — steel, black carbide powder coat

The CURT 45405 receiver reducer sleeve converts a 2-1/2" hitch opening to accept a 2" shank, giving you a simple, heavy-duty adapter for mismatched trailer hardware.

If your tow setup includes a 2-1/2" receiver but your ball mount, cargo carrier or accessory uses a 2" shank, this reducer sleeve provides a reliable fit without changing the hitch. CURT designs and manufactures this adapter to industry dimensions and finishes it in a durable black carbide powder coat for corrosion resistance. It’s a compact, low-profile solution that installs quickly and keeps towing capacity determined by the host hitch.

How does the CURT 45405 make different hitch sizes work together?

The reducer sleeve is a precision-formed insert that slides into a 2-1/2" x 2-1/2" receiver and accepts any standard 2" x 2" shank. By creating a secure internal sleeve, it eliminates the play between mismatched parts and lets you use existing 2" accessories in larger receivers. Installation requires only insertion and a hitch pin (sold separately).

• Fits standard 2-1/2" receiver openings and accepts 2" shanks
• Installs quickly with a hitch pin for a tight fit
• Enables use of 2" accessories without replacing the receiver

Is the reducer sleeve strong enough for towing heavier loads?

The CURT sleeve is built from high-strength steel and welded for structural integrity, but it does not raise the hitch’s rated capacity. Gross trailer weight and tongue weight remain limited to the host hitch and its mounting hardware. Use the sleeve only within those existing ratings and follow the trailer and vehicle manufacturer’s limits.

• Fabricated from robust steel with CNC forming and robotic welding
• Powder coat finish adds resistance to rust, chips and UV exposure
• Towing limits remain governed by the vehicle’s hitch rating

What makes this CURT adapter durable in outdoor conditions?

CURT applies a black carbide powder coat over mechanically descaled metal to protect the sleeve from weather, road salt and abrasion. The finish and welded construction reduce corrosion points and maintain a consistent fit even after repeated use. Routine inspection and cleaning will extend service life.

• Mechanically descaled surfaces for consistent coating adhesion
• Black carbide powder coat for long-lasting corrosion resistance
• Welded seams and smooth surfaces resist chipping and dirt buildup

How easy is it to install and remove the adapter?

Installation is straightforward: slide the sleeve into the 2-1/2" receiver, align the pin holes and secure with a hitch pin or locking pin (not included). Removal follows the same steps in reverse. The design is intentionally simple so you can swap between accessories or return the hitch to its original size quickly.

• Quick insertion and removal—no tools beyond a pin required
• Compatible with common hitch pins and locking pins (sold separately)
• Low-profile fit preserves clearance for cargo carriers and accessories

Who is this for? The CURT 45405 reducer sleeve suits vehicle owners, fleet managers and outdoor enthusiasts who need to pair a 2" accessory with a 2-1/2" receiver without replacing the entire hitch. It’s ideal for people who rotate ball mounts, carriers or bike racks between different vehicles or who want a cost-effective, durable adapter that keeps towing limits tied to the original hitch. If you frequently switch accessories or need a compact solution to a common size mismatch, this sleeve provides a rugged, factory-style fit.