[Vwdiesel] Tire or suspension change or no change?

[Dave Heart]

Hello from Milton's Motorhome, based on 81 pickup.....I switched many years ago to 14 inch tires and 14 inch bus tires on the back..The front tires   used from calculation is 185-60 R-14.  to maintain proper speedometer reading....But I have 2 issues. 1. These front tires are wearing  out faster than normal. 2. When cornering  with body lean can hear a metalic rubbing sound....Should I change  something in front suspension and/or tire size. The rear bus tires are fine but are taller...Not sure if these would fit in front without more rubbing issues and of course the speedometer issue......