Spektrum dx5c speedometer config

[Rodrigol]

Hello! I am trying to configure the speedometer of the dx5c for my felony. I should add the hoons circumference (13.7 "app.) But the reading is wrong. Hundreds of km / hr ... am I entering the circumference wrong?

Thanks a lot for any help!!!

 

[Funky]

You need to calculate and enter the roll out.

 

[Rodrigol]

Solved!!! Thanks a lot