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245 section tyres - will they fit?

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Hurdy:
Alright, I need more grip and I am considering some 17" lightweight alloys for track use and wondered whether or not 245-40-17 tyres would fit okay width-wise.

The radius will be 5mm less than the 225-40-18's but it is the width I'm wondering about. Similarly I believe I would have to have at least 8" alloys for correct tyre width fitment too.

The tyres I'm considering are the Toyo R888's see below.

http://www.tyretraders.com/SearchType/Default.aspx?Width=245&Ratio=40&Rim=17&Manufacturer=TOYO&ItemCategoryID=MOTOR%20SPORT%20TYRES

And this is the calculator I used

http://www.tyretraders.com/Tyrecalculator/

Any input welcome :happy2:

tony_danza:
Funny you mention road legal track tyres, I was speaking to someone today who runs an old factory Leon Cupra Cup car as a track slag and I asked what tyres he used? He said he's found Dunlop DZ02G to be the best, gets a good 6 trackdays (very hard use, soft compound) out of a set if you rotate them and they stick like the proverbial.

Similar in price to R888s and come in either medium or soft compound for about £140-£160 a tyre - something to consider, as a Leon is not far off our size/weight. I think I'll try a set next time.

Sizing, not entirely sure, sorry.

Hurdy:
I've managed to find a tyre width to rim width calculator too.

http://www.alloywheels.com/tyrecalc.asp

245 section tyres should fit on anything between 8" to 9.5" :happy2:

All I need to know now is will the tyre width fit under the arches okay?

Anyone?

jonnyc:
You will have a mission making them fit mate but I think it is possible with the correct offset. Also unless you run a lot of camber for the front arches you will rub a lot if you want the car to be low, if its high you probably shouldnt have too much of a problem..

I had 235/40/18 R888's on the S3 and that was with a ET42 wheel, I think with an ET45+ wheel and rolled arches, 2+ degrees negative camber you should have them fit on without too much trouble..

Im trying to get the 265's on but I need 9" rims for that, up to now I have only found a couple of wheels than I can get in the 5x112 with the correct offset.

Send me an email and ill send you an excel document that I have which should help you out with what your doing!

Jonny

Hurdy:
I was thinking about also dropping a size to 17" x 8" alloys.

The new OZ Alleggerita HLT ones look promising at just 6.4kg's each :surprised:

http://www.alloy-wheels-shop.co.uk/p1046745.htm

Thanks for the info. I've sent you the e-mail :happy2:

265's does look like a proper wide tyre and I'm sure that where there's a will there's a way :smiley:

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