Why cold tyres are slow and unpredictable, and how tyre warmers fix it 

Kart racers obsess over engine setup, braking technique and racing lines. Tyre temperature gets far less attention, and it costs more lap time than most of the others combined.  Kart tyres are built to perform within a specific temperature range. Below it, the rubber compound is harder and grips less. The kart accelerates, brakes and corners worse, and it does all three […]