Sport Quad ATV Tire Spine Run-Flat InsertRun Flat Insert for common Sport ATV tire sizes. These podium proven spines require no special tools for installation, except some lubrication. See our Fitment page for a quick video demonstration. Custom sizes available Single insert pricing Lubrication for installation included Inserts are size specific and should be purchased based on your desired tire size. If you don't see your insert size please contact us for a quote

*Non Beadlock wheels (factory wheels) will require an extra step with a tire machine to install the last tire bead over the wheel

Tire Spine has designed an Ultra 4 & King of the Hammers specific Legal 27" Spine and has been in testing at Ultra 4 races in 2022

Like everything in racing

Ultra 4 and King Of the Hammers (same rulebook) have a very unique rule as it pertains to Tire Run Flat systems

All Install Service Prices are Per Tire

2024 King of Hammers 4900 UTV race 1st place on a flat for over 44 miles

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

and under the impact

If you don't see your tire size please contact us for availability

Pocket Option:

Run Flat Insert for common Side by Side/UTV tire sizes

All Ultra 4 / King of the Hammers Legal Tire Spines will come not to exceed 27" tall regardless of Tire Size Used