5" wheels

[Alan Anderson]

You could also attach a length of tread material (e.g. wedgetop or roughtop) to the outer rim of your center wheels. You really only need a very small bit of extra diameter in order to reduce wheel scrub while turning. Alternatively, you might try removing a bit of tread from the corner wheels to get the same effect.

The slight difference in diameters will give you some wheel scrub when driving normally, and you might see some tread wear because of it.