New motor controller --> Slower speed ?

Hi guys,

A couple weeks a ago, i have faced a problem with my BGT which was stuck in safe mode.

The problem is described here : Stuck in safe mode - Evolve Germany support

Since then, Evolve Germany sent me a new motor controller and it fixed the problem.

I've been testing the board for 2 weeks now and i notice a decrease of my top speed of 5km/h with the stock 76mm wheels and maybe of torque as well. I am having a top speed on 34km/h instead of 39km/h.

Is that due to a new firmware ?

My battery has maybe 10 - 12 cycles max...

 

*83mm stock wheels

 

35kmph was my top speed for GTC as well with stock street wheels, but they are 83mm.
The board is an early 2017.

 

I have a GT street setup max @42kph , I did play with my controller once and it changed wheel size and teeth numbers , make sure you have the correct setting