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The mkiv Supra Owners Club

315/30/18 tyres


bayside_supra
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Hi guys

 

My Pirelli’s are finished at the rear, too many burnouts. I was never that impressed with them anyway. I’ve ran them for no more than 2,000 miles and there is around half the tread left but they are shot. Won’t even hook up in 3rd on low boost anymore.

 

There seems to be hardly any choices in this size anymore. Want something sticky like R888R but all I can find are Michelin PS2 or Yokohama A052. The Yokohama’s would probably be good but at over £700 a pair it would be nice to have some more choice.

 

Does anyone have any suggestions on where might be able to supply me some more options on tyres in this size? They certainly used to make R888s in this size and they do currently offer R888Rs in the US but I cant find them over here.

 

If not, has anyone used the Michelin’s? I could get a full set including fronts for around £600 but will they put the power down? The P Zeros only ever hooked when pretty new and on warm days.

 

Any advice would be great. Fronts are 265/35/18 and would probably be replacing the full set whatever I get. What I really want are Toyo R888Rs but I don’t think I’ll be able to get them....

 

700hp single turbo car btw

 

 

 

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Why wouldn't you consider either the Michelin Pilot Sport 4 PS4, Michelin Pilot Sport Cup or Michelin Pilot Super Sport?

 

PS4's get a great review, they are an update on the older Super Sport - http://www.tyrereviews.co.uk/Tyre/Michelin/Pilot-Sport-4.htm and here http://www.autoexpress.co.uk/accessories-tyres/91858/michelin-pilot-sport-4-review

 

I know they don't look the part but the reviews speak for themselves. A previous forum discussion can be found here - http://www.mkivsupra.net/vbb/showthread.php?336294-Michelin-Pilot-Super-Sport-Pilot-Sport-4

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Rears 18x11.5j tyres315/30/18

Front 18x10j tyres 265/35/18

 

These are the tyre sizes CCW said to use and they do fit the wheels perfect

 

/QUOTE]

 

You are runnng what is considered the minimum width on the front and the maximum width on the rear.

 

You have to remember CCW will have based their tyre recommendations (width & profile) on US roads, not U.K. roads. This aside, the Supra suspension is old tech which doesn’t work well with those profiles but that is another conversation for another time.

 

Personally, I would look at putting a minimum of a 35 on the front and 40 on the rear. The 40 rear profile will give you more sidewall, better grip under acceleration and more predictable handling.

 

Regarding width you can run a 275 or 285 on the front and 295 or 305 on the rear. These would be considered the “ideal widths”.

 

A 275/35, 275/40 or 285/35, 285/40 on the front and a 295/35, 295/40 or 305/35, 305/40 on the rear should give your better options and more of a selection. Depending on how low your car is they may scrub. You could pop as far as a tyre fitters and see if they have any old tyres in those sizes that they could fit so you can try them before hand.

 

It would be worth your while speaking to CW and see what he has to say. As the forum Geometery specialist with years of experience his advice is invaluable.

Edited by Frank Bullitt (see edit history)
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I wouldn't be adding any more sidewall to the 315 rears if you can help it. The R888 seems 'oversized' compared with some other tyres as it is, much more sidewall sag and you're going to foul everywhere. Going up to a 40 profile on that same width is going to add another 35mm to the running height of the car too, while reducing your clearance to the arch by the same.

 

I used to run 285/30/18 up front on the 10" alongside the 315/30/18 at the rear on the 11.5" and it felt fine. :thumbs:

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I wouldn't be adding any more sidewall to the 315 rears if you can help it. The R888 seems 'oversized' compared with some other tyres as it is, much more sidewall sag and you're going to foul everywhere. Going up to a 40 profile on that same width is going to add another 35mm to the running height of the car too, while reducing your clearance to the arch by the same.

 

I used to run 285/30/18 up front on the 10" alongside the 315/30/18 at the rear on the 11.5" and it felt fine. :thumbs:

 

It does feel fine to be honest. The tyres just don’t hook up anymore. I have had a look and it only looks like 295 35 18 are available anyway.

 

So I can move to 295 and have a bit more choice or stick with 315 and have the same issue with virtually nothing to pick from. Not sure what to do. Has anyone run Michelin PS2?

 

image

 

 

 

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