omgulur
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Best tyre size for 17's
Hey guys just bought some newish wheels for my 1990 n/a just wondering what size tyres should I get for the front with a stock suspension setup rim size is 17/7 with a + 35 offset if i'm not mistaken, i have a set of four wheels with 225/45 tyres which are fine in the back but the suspension sits on the tyres... what do you guys recommend and I don't want to go too low profile that I have a bad ride.
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Mr2gtracer
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Re:Best tyre size for 17's
2012/04/24 17:26:43
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Honestly, i would look at getting a lower profile if you have 225's. Not much, just 40 instead of 45. This will bring you closer to the same diameter of the stock rims/tyres. At the moment the 45 profile are making your wheels too large a diameter. I've found out a good overall size for 17's are 17x8 +35 215/40 (f) and 17x9 +35-40 235/40 (r) Have a look at this. It will show you what size wheels with tyres will look http://mr2.gordaen.com/wt_calc.php
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MRVirgin
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Re:Best tyre size for 17's
2012/04/24 17:32:08
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215/40 on the front and 225/40 on the rears.
Has the added bonus of still being legal.
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MANDALAY
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Re:Best tyre size for 17's
2012/04/24 19:44:17
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205/40/17 84 min rating with 17x7 35 offset
235/40/17 91 min rating with 17x8 35 offset
Just make sure the tires have the rating , PS not that many tires are available.
Those sizes are totally legal and can be verified by the tire plaque, which you should have on your door jam.
Dont give a Cop the chance to question the tires you have and they will leave you alone
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MANDALAY
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Re:Best tyre size for 17's
2012/04/24 19:55:00
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MRVirgin
215/40 on the front and 225/40 on the rears.
Has the added bonus of still being legal.
225/40 Which tire is that ?BTW i highly doubt that it is legal because its too small to have a rating of 91 . Making it illegal
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MRVirgin
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Re:Best tyre size for 17's
2012/04/24 20:27:55
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Ok load ratings aside it is legal.
it should read 235 not 225
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blacky83
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Re:Best tyre size for 17's
2012/04/24 20:30:36
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215/40 and 235/40 is what I plan on running when I get tyres for my 17s, although I believe technically that is only legal on a Rev2 placard.
There is a slight difference between the rolling diameters of the 14s and 15s, and that actually has an impact on what you can run strictly according to the +-15mm.
Can't check right now, but I believe the Rev1 had a lower load rating in the rear, so if you do switch to the later placard you'd need tyres to meet the higher rating.
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omgulur
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Re:Best tyre size for 17's
2012/04/24 21:34:38
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hey guys i've already got the tyres changed over for the front too 205/40's but i kept the rear tyres the same just because i have about 2-3 months till i get my car on the road, next week I have big plans to start getting the engine out and putting in one that hasn't got a rooted diff in it. So maybe when i get it close to roadworthy i might have to change the rear size.
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MANDALAY
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Re:Best tyre size for 17's
2012/04/24 21:36:44
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14's i think had a higher aspect ratio which will give you the 91 rating.
Cops might look at it IF you a) piss them off or b) they know what they are doing.
Ild be more concerned about an insurance company refusing to pay. Great way to decline the insurance especially if the tyres were some how implicated with the cause of the accident.
In the great old days many of us had the OEM wheels in the garage, but times have changed and everyone has a mobile phone ( camera )
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dylmrt
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Re:Best tyre size for 17's
2012/04/24 21:44:22
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when I ran 17s I ran 215/40 and 255/40
Just liked the fat rear tyre look.
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MRTurbo
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Re:Best tyre size for 17's
2012/04/24 23:19:10
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My rev1 placard states 87 on the rear. My 235/40/17 federal 595 Rs-r is 90 rated. However I did have trouble with the fronts as in a 215 theyre only 83 and theyre supposed to be 85. I put this down to the type of tyre and the compound where they would get too hot under load. FWIW my old cheap fronts were 87 in the same size. Also if you look at the actual kg rating of 83 for eg they still will support much more than the front end of an sdub will give them.
post edited by MRTurbo - 2012/04/24 23:51:08
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i 
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MANDALAY
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Re:Best tyre size for 17's
2012/04/25 05:02:37
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A couple of numbers off doesnt mean that it wont support the car, its just to be pedantic and technical it would be considered outside manufacturers specification and illegal.
Just food for thought
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