SteveF

Hi guys, sorry if I've stirred things up that was never my intention. Worth remembering that some performance rear wheel drive cars DO run a WIDER tyre on the rear, however this is usually compensated by a lower aspect ratio as I described earlier. Always worth sticking by what the manufacturer says in my view, they spent millions on development optimising the performance and safety aspects of their cars. Some BM's run wider on the rear with reduced ratio to keep rolling radius the same, M-Sport models I believe? Maybe you could Google the tyre options for your mota? Cheers.

The manufacturer recommends the correct and safe size(s) of tyres for their cars. I am not aware that Subaru recommend or advise different tyre sizes front to back, especially on their 4 wheel drive vehicles. As to the legality, I would not like to argue the toss with the Policemen that attend an accident with a fatality involved. Nor with the relevant insurance companies. As I said, AIMVHO. Cheers.

Yes you could blow a diff and if I may say, driving a car with different size tyres is very dangerous. If you have an accident and plod clocks it they will throw the book at you and your insurance company will disown you! To release wind-up, whilst driving on an empty road or car park, in a straight line at 20 - 30 mph, pull up the handbrake and then quickly release whilst keeping your finger on the button. You may hear a bang from under the car. This is the stresses being released. By 'buckets' of it I meant lots of wind-up. Oh, and this isn't one, its serious! Get them tyres changed bud, you know it makes sense. ;)

With those different tyre sizes you have different rolling circumferences/radius? So one diff is being rotated at a different rate than the other. The 225's should be 35 aspect ratio to match the fronts, basically so front and back are the same diameter. This might also have something to do with the unusual wear pattern on the rears. When you sort it I suggest you release the axel wind up that will have been created too. If the car does not free wheel easily and there's no other reason for it, I suspect there's buckets of it. AIMHO, of course. Hope it help.

A Black B9 over here Martin!

Hi everyone, first post on here, did not know of this site until today. Hope to see a few nice motors and pick up a few tips. Current toy is a 22B and our family motor is a B9 Tribeca. See you in the forums!