Adding minimum resistance

[jfranci3645]

I'm using my unit with Zwift and an Apple TV over Bluetooth. I've calibrated the unit and set the tire for a 700x25c 2105 (?). My problem is that I'm cranking away at just 170w on a flat going too fast for my gearing. I've got a 1x bike 42x11-28. I can usually pedal comfortably at 105+ rpm on the road, but can only feel comfortable at around 80 on the trainer for some reason. In any case, I'm running our of gearing. Is there a way to add base / minimum resistance to the trainer?