We now added the English version with prices.
As you can see the most price affordible is to change your wheel size. 99 euro / 119 euro (depending of the age of the E6000 motor : if it's a older one you have more work)
For the E8000 and E6002 motors the next step will be only the speed with in...
If you want to have the same speed Garmin vs E8000 /E6002 motor, then you can do a setup with the SM-PCE1/2, and the software to resize your wheel diameter .
you can find it on speed plus.nl , it will take 3 min. to download the software.