7 replies to this topic

[BigWillieStyles]

Hello all,

ok, I have got a quote on some top tyres. While my fronts are basically worn out, my rears still have some decent tread left in them. Now the American forums a littered with people suggesting that you have to replace all four tyres in one go and they must be the same on the rear compared to the back?

The way I understand it, is there is two diffs, front and rear, and the tyres need to be the same on each diff.

How does the centre diff work? Will having some nice new tyres on the front and some oldies on the rear affect the centre diff?

thanks

Will

[RX25SE]

Is your auto or manual?

[BigWillieStyles]

manual

[RX25SE]

So there are effectively 3 diffs, front rear and center.

The autos use 2 (IIRC) with a clutch pack in the center rather than a diff.

Either way the amount of rolling diameter that would change between a worn tyre and a new tyre (basically the tread depth) would me minimal.

[bobbyjimmy]

I'd keep the old ones on the rear and get new ones for the front.

[RXJezza]

I had 2 new on the front and 2 barely legal on the rear for about 5000km's, the 2 fronts were different brands but had the same tread pattern and my diffs are fine.

[SUBARU]

You'll be fine mate. Problems arise when you're running different diameters on either side, not different brands or old versus new.

Go for it and as mentioned, old on the back, new on the front.

[Alex]

As long as the front to rears don't differ anymore than about 5% in total rolling diameter, you'll be fine.

This pretty much means a variation of the same tyre size between different brands, and varying tread depths.