Tire Spine, LLC ia a company in Georgia, USA. Tire Spine, LLC manufacturers the Tire Spine Infinity (Tsi) light-weight flat-prevention system for off-road vehicle tires. Tsi is not a tire but is a proprietary foam insert installed into the carcass of a tire. What seperates the Tire Spine Infinity (Tsi) flat-prevention system from other systems is our one piece construction.