Just started my seven day trial. I have hooked up my Garmin GSC10 to Zwift, I am using it with a Roto magneto trainer.
The speed on my Garmin computer and the speed on Zwift differ significantly.
According to Garmin I was at a steady 20mph. Zwift said I was doing 10mph then speed up and at one point Zwift said I was doing 30mph, my Gamin has remained steady at 20mph.
I have looked in the setting and tried to search to see what the issue may be but cannot find anything.
Anyone got any ideas?