Building my first ladder car???s

I am going to try and butild a car to send in for the next race. What is the fastest most common wheelbase the pro’s are using??

From what I’ve been told, and experienced with, a shorter wheel base is faster, but harder to tune. I’d recommend a 4 3/4 wheel base, because that is a good balance of speed and tuning ability, but as you build more cars, you may want to make them shorter or longer.