These tyre warmers from Sparco are designed primarily for rally cars and use a thermostatic control to keep the tyres at approximately 85 degrees C. These warmers are ideal for teams on a budget as they do not require a controller which keeps the costs down.Brings tyres to race temperature so they provide optimum grip from the startAvailable in a range of sizes to suit Group N, S2000, Group A or STCIdeal for teams on a budgetThe Sparco fixed temperature tyre warmers require a 230v supply (plug adaptor required for UK use) and draw up to 2800 watts max depending on size. The inner features a polyester material with carbon fibre filaments. Insulation is provided by a non woven fabric to retain the heat in the tyre. Close fitting sides with velcro fitment are supplied to prevent heat escaping.Size Options:Size 1 - 170-215 nominal tyre width, 570-600 nominal tyre diameterSize 2 - 220-260 nominal tyre width, 600-620 nominal tyre diameterSize 3 - 190-215 nominal tyre width, 635-640 nominal t