Ultra-Fab Super Grip Chocks eliminate front-to-back rocking motion when applied between tandem trailer tires, using opposing force. Pivoting louvers increase tire grip, and the handy padlock helps deter theft. The superior handle design reduces slippage while mounting between tires. The Super Grip Chock collapses to only 1″ and expands to 10.5″. Heavy-duty steel construction ensures years of rugged use. E-Z ratchet included. Weight: 11.3 lbs. Manufacturer’s lifetime warranty.
Before You Order
Verify part number 21-001091 exactly Match the listed product details to the part you are replacing before ordering. Compare dimensions, specifications and fitment information with your RV or component.
Frequently Asked Questions
What part number should I verify before ordering?
Verify 21-001091 on your existing part, documentation or equipment label before ordering.
How should I confirm this part fits?
Compare the listed part number, dimensions, specifications and fitment details with your existing component. Do not rely on appearance alone.






