tyre wear

[redman135]

I live in a "keep left" country and accelerated tyre wear on the outside 1/2 of the left front tyre is common ie bald outside and approx 25/30mm of tread on the inside. Tractors observed are contractors units.
To those readers in keep "right countries". Do your tractors on high road use suffer from accelerated wear on the outside 1/2 of the right front tyre?

 

[MattLynch]

Yes, I just traded in a John Deere with an almost bald RF outside. Cars/trucks suffer from the same problem but not as noticeable if the tyres are rotated. Caused by the road crown ( slight slope engineered into roads to allow water to run off)

 

[redman135]

I had been told 2 theories.
1) road camber as you said.
2) axle is cambered for keep right market as keep left market is to small to be economic.
Unfortunatly rotating tractor tyres is difficult with fixed rims as you need to demount them and swap rims. Also under NZ law it is illegal to run directional tyres backwards.