17 x 7.5
stock tyre size 215 40 17
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i'm running 215 45 17 on both sets of wheels as they are the only suitable size I could get the michelins in and also theres more option for tyres.
srit's didn't scrub much but they sorted themselves out pretty quick.
my oz racing ones needed some mods done to the car to stop the scrubbing but thats due to 8" et37.
as for purchasing you can get them off ebay or go around to any reputable tyre store.
they have come down in price a bit due to getting pretty popular.
Agree 100% with guy 27 that (at least back when I was looking for new tyres), 215/45R17 is usually cheaper than both 205/45R17 and 215/40R17, and you will have more options in that size, possibly due to it being more widely used. Low profile 215s should also fit on 7.5 inch wide wheels better than low profile 205s. And 215/45R17 should ride most comfortably out of the 3 sizes (all else being equal!).
Having said that, faneca: make sure you do check your state's regulations. Because (and I believe I have said this here before) 215/45R17 is illegal in NSW for TS Astras according to my calculations, so an insurance company can refuse a claim. This is because "the outside diameter of the wheel and tyre combination must be no more than 15mm over the largest diameter wheel and tyre combination specified for the vehicle" (see the bottom of page 2 of http://www.rta.nsw.gov.au/registrati...vsi09_rev4.pdf).
Standard SRi-T size 215/40R17: circumference of around 1821.02mm i.e. diameter of around 579.65mm.
New size 205/45R17: circumference of around 1858.72mm i.e. diameter of around 591.65mm. A 12mm difference i.e. within 3mm of the legal requirements.
New size 215/45R17: circumference of around 1885.86mm i.e. diameter or around 600.29mm. A 20.64mm difference. i.e. more than 5mm outside the legal requirements.
Which is why, as a daily driver, I ended up getting for mine, 205/45R17 RE002s that were in (cool and dark) storage for a few months at a significant discount. Besides the fact that I could not afford the PS3s! :P
Just got a set of Kumho Ku31's last week for $150 each.
For the money they are pretty damn good. Obviously not as good as Pirelli P-zero/Pilot Sports etc, but dry grip is fantastic and very linear. Wet grip is above average, but nothing special.
Tyre noise is much quieter than the Federal 595 RPMs that they replaced, and they seem to make the ride less harsh somehow
@faneca : http://www.sa.gov.au/subject/Transpo...eels+and+tyres
SA is also 15mm, but you have to compare it to the largest tyre size listed on the tyre placard that is somewhere on the vehicle, anyone know what that is? I can't get to my car :S
Edit: Sorry had that the wrong way around; it is no more than 15mm more than the largest tyre size, no more the 15mm less than the smallest
also in regards to where to buy tyres, has anyone had experience with St. George Tyres or Ozzy Tyres? Both seem dirt cheap and being Aussie based are cheap/free shipping. Have heard St. George use old stock though, is this necessarily a bad thing?
I've purchased of st george before. Only downside was it had no australian warranty. Was only warranty though them. So if you had a defect with a tyre and it was 50% worn. They would give you half the cost of the tyre back once you returned the tyre to them. If you had the same issue with an authorised reseller it would be a change over for new item.
I use this site for comparing sizes: http://www.rimsntires.com/specs.jsp
There's also link on the left called 'Plus Sizing' on there where you can enter in the stock tyre size and it shows you similar tyre sizes for bigger diameters