TYRE WEAR

Forum: 

My 2.8 F78 fourtrak is wearing front tyres every 15000 miles.
It has just passed an MOT without problems as usual but for two tyres.
The inner edges for 80mm wears to nothing and the remainder edge remains with 6mm or so left.
I do conduct tyre turning by the way.
Its as if the tyre pressure is pushing down severely in this points.
Is there any adjustments available.
Any fourtrak technicians out there?
Thankyou would appreciate any comments