The gearing is stock that was with the car. The only thing I changed on the car was put larger diameter wheels on it. Previously I did have the 9t 35A Ezrun system before deciding to upgrade to the 6.5T 60A Ezrun system and the 35A system ran fine with the larger wheels.

The car originally has much smaller diameter wheels (kyosho pureten wheels) than the ones on it now. Relating to gearing, could this be the issue for the 6.5T 60A system in my car???