after calibration is complete, a calibration value will be shown a value between -15 and 15 is good a value lower than -15 indicates that the roller pressure is too low, should increase using knob on the trainer a value lower than +15 indicates that the roller pressure is too high, should decrease using knob on the trainer
Samsung galaxy j7 user guide
If your gears are too low (or, in other words, too easy), you might be left behind as you spin out. ... every 10 or 12 seconds you’ll probably need to get out of the saddle to maintain the speed ...