Tyre advice
 

Hi folks, the rear tyres on my new wagon are pretty close to the limit but the fronts still have a little life left. Does it matter too much if I just replace the back ones? What I'm asking is does it matter too much if the rolling circumference is slightly different front to back? I know I should replace all four but can't afford it just yet.

I'm pretty sure it's fine to do the backs then the fronts at a later date, as long as you change them in pairs. I think it's when you change the sides independently that you can cause problems. The size difference will only be a few mm anyway.

Always keep the better tyres on the rear, under steer is 'safe', snap oversteer isn't!