Apologies. Guessing new 8mm (measuring mine new). If you have 7mm, then 1mm wear in five months.
Sorry, should have made it clear.
The new ones should be on the back anyway (according to most advice!)
I've never heard it that way. I've always been under the assumption that new go on the front and the old front ones go on the back.
Here we go again data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
I’m definitely in the camp that your best tyres go where you have the least control. So typically in a front wheel driven car you put the best tyres at the back. Assuming that it has front steering as well data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
I have only ever swapped to prolong new tyre expense with the driven wheel. Never blew up and killed the planet, never crashed, never had an issue. Work would only change van tyres singly unless it was on twin wheel corners where tread must be the same, it was all legal and safe. Never crashed and blew up the planet in the vans either.
But have you ever blew up and killed the planet? data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
I didn’t think nuclear weapons had tyres....
Not yet. Meaning lots of things I do are safe by reason the planet is still here. Out on the edge me, I don't put the divider down at the tills.
(really some see it as a cardinal sin, tyre and thatdata:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7).
Never bothered, just had them fitted where they are needed. Last new ones went on the front of the GTD and were changed at a smidge over 2mm.
Regardless of which end your driving wheels are on, in the event of imminent death due to an impending collision, your steering and maximum braking wheels are likely to be the most important.Which are the ones at the front data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
Similarly, if you have only 2 winter tyres would you put them on the rear wheels of a front wheel drive car?
Anyway, my advice was and remains that he shouldn't bother swapping