Big wheel problems

[banpei]

What you could do to determine the issue, is to put a bit of chalk on your lip. You could use really cheap kids chalk for this (the ones kids draw in the streets with) as this has the bonus that those have various colors. Then steer until you hear the rubbing and check if it rubs against the lip as the chalk should then be on your tires. If not, apply the chalk somewhere else you suspect it rubbing against and repeat this until you have found it.