Well I've been trying out different tyres with a bit more grip than the kit X Pattern D Compound, at Wednesday night indoor club meetings, and that's two HPI 20T Saturn motors I've worn out now, the brushes have worn down so far the motor is losing speed and just over heating.
So if you are doing the 24Hr I'd advise a quick change method with a flying lead and idiot proof connectors for a quick swap out.
Good news is I've yet to fry a ESC, but having said that the longest I've run has been 8 minutes and they are getting upto 80C plus in that time!
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