Once the wheels are on the ground they will travel at the same surface speed, as friction will synchronise them, unless you have so much power that they lose traction but as they are fairly closely matched i think that's unlikely.
As the previous contributor said just use one as the input and go with that most likely the rear will give the best indication as its a fixed angle.
Best of luck Pete
As the previous contributor said just use one as the input and go with that most likely the rear will give the best indication as its a fixed angle.
Best of luck Pete
