The reason why I asked for the photo is I wanted to see the amount of right thrust the motor has, more specifically, does it have enough. Having the correct amount of right thrust coupled with a throttle curve ( a feature of your transmitter ) to smoothen out the power output would really help with the issue you are describing. When the airplane veers left, is it immediately following a big power increase? Your wheels, as long as they appear to be visually straight and one isn’t binding have virtually nothing to do with your issue.

After a bit of research, I found that your TX does not have a throttle curve feature while in airplane mode. So it may end up that right thrust optimized is the best that can be done. In the meantime, I suggest you carefully run up the motor from zero to full power while moving the throttle stick fairly slowly and see if at any point the throttle makes a big jump in RPM that is disproportionate to other throttle increases.