Originally Posted by
Spartan420
I'm using a classic trainer with the old Garmin gsc10 speed cadence censor.
I don't know if it is the trainer, but I am pedaling harder in easier gears to maintain a slower mph than what I do on the road.
It is the trainer as mentioned above. If you are pedaling at the same cadence in an easier gear the speed has to be lower even if it feels harder. With few exceptions, trainer speed has no correlation with outside speed