stick with 205

I think some people do fit 215, but i would tend to stick with 205 as our man joel says.

6.5", so 6.5*25.4/0.7 = 235mm!!

I'm surprised by that too, and frankly wouldn't go that wide on the 30 aspect ratio you'd need to retain the rolling radius.

Our furby had Federal tyres on when we got it and bloody hell they are noisey. Makes a bloody horrible noise.

Swapped to Vredestein SporTrac 3 and they are vastly superiour in every way.