Ultra 4 Legal Tire Spine Run-Flat InsertLegal Run Flat Tire Liner Insert for Ultra 4 and King of the Hammers. All Ultra 4 King of the Hammers Legal Tire Spines will come not to exceed 27" tall regardless of Tire Size Used. Please tell us your wheel and tire size in the notes section at checkout. Solid 1 piece Spines with no cut, are not end user installable and all tires must be shipped or delivered to Tire Spine for installation. Install Labor Fee per tire will apply. Install information

model of tools on demand

Tire Spine currently has 2 different possible Ultra 4 Legal Spine Variants

Tired of flat tires

These are a legal created tool to help get you to the finish line or even to the pit for a faster tire change

Expect vibration

Maybe your UTV roof

Or just need some cool shop bling for yourself

Due to website shipping calculation limitations

trail tested and military used inserts are your solution to flat tires taking you out of the event

Nothing is indestructible

Lubrication is provided with new insert purchases

your race trailer wall