CZC AUTO 2.5-Inch Hitch Clamp Anti-Rattle Stabilizer — Heavy-Duty U-Bolt Cross Clamp for Bike Racks & Cargo Carriers

CZC AUTO 2.5-inch Hitch Clamp is a heavy-duty anti-rattle cross clamp designed to lock trailer hitches and accessories firmly in place, reducing noise and movement while towing.

When towing a trailer, carrying a bike rack, or hauling a cargo carrier, unwanted play between the receiver tube and shank can create noise, wear, and an unstable load. This CZC AUTO cross clamp fits 2.5" hitches (common for Class II–IV setups) and uses a U-bolt plus crossbar design to compress and immobilize the inserted accessory for a quieter, more secure connection.

How does this hitch clamp stop rattling and wobble?

The clamp squeezes the accessory shank against the receiver wall using a φ0.5" U-bolt and a heavy crossbar, removing lateral and rotational play. A combination of rubber coating, plated hardware, and spring washers holds torque and dampens vibration to keep the connection tight during driving.

• U-bolt and crossbar apply even clamping force to the shank
• Rubber-coated U-bolt section increases friction and reduces metal-on-metal noise
• Spring washers maintain tension and resist loosening from vibration
• Nickel and electrophoretic coatings guard against corrosion

Will this fit my hitch, and what accessories are compatible?

The CZC AUTO clamp is sized for 2.5" receiver-style hitches and works with most Class II, III, and IV accessories. It’s compatible with common hitch-mounted items such as bike racks, hitch trays, cargo carriers, ball mounts, and many third-party brands.

• Designed for 2.5" (2 1/2 inch) receiver shanks
• Compatible with bike racks, cargo carriers, ball mounts, and weight distribution gear
• Works with popular brands like CURT, Thule, Yakima, Rola, and others
• Suitable for trucks, SUVs, vans, RVs, and campers

What materials and corrosion protection does the clamp use?

Built from high-strength steel for long-term durability, the clamp combines different protective finishes to stand up to road conditions. Zinc, nickel plating, and an electrophoretic black coating help resist rust, while the rubber-coated U-bolt section protects finishes and dampens noise.

• High-strength steel construction for heavy loads
• Nickel-plated U-bolt and black electrophoretic crossbar for corrosion resistance
• Zinc-coated hex nuts and washers to prevent seizing
• Rubber coating on part of the U-bolt to reduce noise and friction

How easy is installation, and what tools are needed?

Installation is straightforward and reversible: insert the accessory, position the clamp, then assemble washers and nuts using a wrench. The clamp can be mounted from above or below the receiver tube; a single adjustable wrench is typically enough to tighten the assembly securely.

• Insert accessory shank into receiver and place crossbar over shank
• Slip U-bolt through crossbar and receiver, add flat and spring washers
• Tighten hex nuts, check torque, and re-tighten after short use
• Recommended tool: adjustable wrench or socket wrench

Who is this for? The CZC AUTO 2.5" Hitch Clamp is ideal for drivers who frequently tow trailers or use hitch-mounted accessories and want a low-cost way to reduce noise, vibration, and wear. It’s a good fit for owners of trucks, SUVs, vans, RVs, and campers who need a durable, corrosion-resistant solution to secure bike racks, cargo carriers, ball mounts, and other hitch-mounted gear.