[phill_g]

Hey,
I got I changed my tyre size from 205 50 17 to 225/45/17 but wanted to know what the best pressure to run at would be? Also it's vibrating and steering has gone off centre since putting these tyres on. Any ideas? It's a mazda 3 2.2 185 diesel
Cheers
Phill ?

 

[XCNuse]

Did the tire shop forget to give you a wheel balance? That'll ruin everything. They need to be balanced properly.

Run the same pressure; ~35psi.

 

[crossworth]

33-35 psi would be the safest depending with your usage. I agree the tire shop should have all the wheels balanced properly