check urself first lah!! like see whether the tyres have any
clearance from the mudguard, or body parts. or any of the parts
touching with wheels when have passengers.
u said u changed springs before, so they might be lo profile type
but not stiffer ones, and didn't installed properly, or shock
absorbers are still soft type, so have wheels scratching when
heavy.
changed springs for scratching sound??? u might as well donate that
money.