Fliiiight is designed to actively avoid making contact with your wheel. Wheel-magnet contact could still occur occasionally with the correct set-up, for example if you tend to sway during out-of-the-saddle work, but it should resolve itself if you keep riding.
Try these troubleshooting steps if you experience wheel-magnet contact.
- Make sure your wheel and tire are compatible.
- Gear up. Increasing your wheel speed reduces the chance of wheel-magnet contact, while improving road feel and increasing your maximum resistance. Note that you should always use your fastest gear in ERG mode.
- Check that the magnets are level with your rim. Fliiiight trainers are shipped aligned for a standard 700c road wheel or 29” MTB wheel. You may need to adjust the height of the resistance unit slightly for your wheel. If the magnet array is partially facing the tire, it will not be able to create enough resistance, and may rub the tire.
- Check the parallelism and concentricity.
- Make sure you have the latest firmware update.
- To minimize movement of the bike in the frame, use the included trainer skewer, and check that it is properly installed and cannot shift relative to your hub. Tighten the threaded rods to secure the skewer and lock the jam nuts against the frame.
- Make sure your bike is installed in the correct orientation. The legs should extend towards the front of the bike, with the frame around the rear, and magnets parallel with the rim. Installing the bike backwards results in persistent severe rubbing, and 0 power reading.
- If you've done an upgrade or adjustment, check that the mounting bolts are tight and the resistance unit is unable to move relative to the frame.
- Check that your wheel is true.
- Use the Chrome app to adjust motion limit out slightly. Note that this will decrease the maximum resistance the trainer is capable of. Try other troubleshooting steps first.
- If one side is consistently closer to the wheel rim and responsible for all the wheel-magnet contact, use manual commands in the 4iiii app to check the motion of the motors. If one is not moving well, contact support.