Watch the tutorial for my secret method to center the speedometer properly!
Not made by me, I've simply repacked the files with my custom speedometer settings & arranged them for a simple single drag and drop install
I've enlarged the speedometer, made the background less transparent, and changed the "km/h" format to "KMH" to match the "MPH" variant
Default Settings:

BLOOB Custom Settings:

If you don't want these changes, please use the original download in the link below
All credits go to opp on GitHub: https://github.com/opp/gpx_speed/
Get the version with my Custom Settings in the Zip Folder below