the jammin(or hong nor looking where you are) SCRT the 60A 8.5t should work great in.
Have the electronics in my Jammin .5 CRT (the SCRT is only longer gears are identicle), and it flies on the 60A setup with a 16t pinion After a 30 min run the motor was like 1-2 degrees over ambient temps, and the ESC was at ambient(It was 95 degrees out last time I took it out for a real run). You will have to drop the pinion some due to the bigger tires, but it should still work fine.