Definately a bearing set as these are only a tenner, depending in the surface then tyres, for a 5 minute race I run a 3200mah lipo and that has new than enough power, in my 60a esc I run a 8.5 turn brushless and it powers that perfectly, depending on how cold it is I would carry a spare frot chassis plate as these become very brittle in the cold apart from that you should be all set for racing
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