Torn up inside front disc surface? Looks good on the outside, but somebody let the inner pad wear down and you can't see it until the wheel is off?

Like I know...c'mon...

Bad manual hub. That must be it.

Dead rabbit. Could happen.

Lower control arm bushing. There aren't any grease points on those. Drove me crazy on my first Raider.

Or a few dozen other things.

John B.