This is super helpful. Thanks, guys. So am I looking for something like this for a dirt track? Are these the correct sized wheels?
https://www.modelsport.co.uk/index.php?product_id=405191&gclid=CjwKCAjwxLH3BRApEiwAqX9arfSWL7jPLQxTTSOVbjiFwrDvfSQQhxtDm4NfkF1HR7yWfbBE5N3EUBoCKTYQAvD_BwE
Also, can someone explain to me how the 12v chargers work these days. Do you still have to connect them to a car battery using crocodile clips or is it now a cigarette lighter job?