Losi 5t 2.0 pinion and spur questions

[Rep732]

I'd like to change out my spur to a 58t but im not sure what pinion to go with and what pinion "keys" do you go with? Im just buying to see if I can hit mid to high 50's on this truck thats all just for fun

 

[DougStar]

Here is the vertigo gear chart?

 

[Rep732]

Thanks Doug thats very helpful