CURT RockerBall 2-5/16" Cushion Hitch Ball (1-1/4" Shank, 12,000 lbs., Packaged) #40249

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The CURT RockerBall cushion hitch dynamically absorbs jerking and jarring from your trailer at the coupling point. The ball easily bolts onto the included trailer hitch ball mount to provide increased comfort and enhanced control.

Quick Facts:

  • Dynamic trailer ball featuring ShockDrop technology
  • Dampens jerking and jarring from bumps and potholes for smoother towing
  • Cushioned isolators reduce rattling and vibration for a more comfortable ride
  • Reduces shock loads to the vehicle during sudden braking or acceleration
  • Minimizes stress on tow vehicle's suspension and brakes for extended longevity
  • Retrofits onto most existing ball mounts to improve current towing experience
  • Virtually maintenance-free with no airbag or bearings to service
  • Grease zerk fitting provides easy lubrication
  • Anti-swivel base fits 3" wide ball mount tongues with 1-1/4" diameter hole
  • Forged steel construction for dependable towing power
  • Durable carbide black powder coat finish on base and chrome plating on ball
  • Standard trailer ball diameter fits 2-5/16" couplers
  • Rated for 12,000 lbs. gross trailer weight
  • Tested for safety to meet SAE J684 specifications
  • Limited lifetime warranty (one-year finish, one-year parts)
  • Ball mount sold separately (not compatible with Rebellion XD ball mount)
  • Patent pending
  • The mounting platform must be at least 3/8" thick and the hole size must not be more than 1/16" larger than in diameter than the threaded shank.
  • CURT part number: 40249

The CURT RockerBall trailer ball is a cushion hitch ball that dynamically absorbs jerking and jarring from your trailer at the coupling point. Just bolt it onto your existing trailer hitch ball mount to enjoy increased comfort, enhanced control and extended longevity of your vehicle's systems. The RockerBall tow ball is engineered with ShockDrop technology: a cushion isolator that reduces noise, vibrations and chucking at the coupling point. This produces quieter towing, increased driver control over the trailer and reduced strain on the vehicle's brakes, towing system and suspension, compared to a conventional metal-on-metal towing connection. The RockerBall fits onto a variety of standard ball mounts -- virtually any ball mount with a 3-inch wide trailer ball tongue and 1-1/4-inch diameter ball hole. RockerBall is also virtually maintenance-free. Unlike other cushion hitch and torsion hitch options, it has no airbags or bearings to service. Just apply grease to the zerk fitting as needed for continuous lubrication and smooth towing. The RockerBall trailer ball is constructed from forged steel for exceptional strength, and it comes with a powder coat finish and chrome plating for dependable corrosion resistance. Note: This trailer ball comes with retail packaging.


  • SHOCKDROP TECHNOLOGY. This cushion hitch ball has an integrated cushion isolator that dynamically reacts to bumps, vibrations and uneven roads, giving you more comfort, control and confidence while towing
  • INCREASED COMFORT. The RockerBall trailer ball absorbs jerking, jarring, rattling and noise at the coupling point, unlike a traditional metal-on-metal trailer connection, providing a more comfortable ride for driver and passengers
  • ENHANCED CONTROL. The unique cushion hitch isolator in the tow ball offers enhanced driver control, especially in events of sudden braking, limiting the effects of trailer chucking and jerking
  • MAINTENANCE-FREE. The RockerBall anti-rattle hitch ball is virtually maintenance-free. It has no airbag or bearings to service. A grease zerk fitting allows for easy, continuous lubrication for long-lasting use
  • EASY TO INSTALL. This shock-absorbing hitch ball fits onto a standard ball mount. The anti-swivel base fits over a 3-inch ball tongue, and the shank drops into a 1-1/4-inch diameter ball hole

Warning: Cancer and reproductive harm.
More Information
SKU 2021017398
Brand Curt™
Series RockerBall™
Country of Origin CHN
Warranty Term Limited lifetime warranty (one-year finish, one-year parts)
Unit of Measure EA
Item Length 8.000
Item Width 4.000
Item Height 4.000
Item Weight 7.500
UPC 612314047918
Manufacturer Reference Number 40249

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