finally got time to do an actual speed test using my garmin gps, finally got the single speed tranny conversion into the truck and four shocks were out this time using just the stock tires (stock tires are 1 lb heavier than my other tires) total of 9 lbs weight overall with my other tires, but 10 lbs on the stock tire ones, top speed was 42 mph, it might go up a little more because the my testing ground is not really very open space with 15/72 gearing c50maxx on my 4s lipo with maximizer diff cup, no heat problems actually runs cool and can be easily get the gear ratio higher for higher top speed but i'm satisfied with the top speed

i pretty shur your gearing is off but im no expert. try 66 15

It is not that big of a difference stampy. About like a 14 66 is a 15 72