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09-13-2015, 10:32 PM | #1 |
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Maximum rim size I can put on my tyres?
Hey guys!
Probably a real noob question and have looked on the threads but cant find much Ive got a set of run flat tyres with the stock OEM style 261 rims, I like them but want to change up the look. I think from memory the fronts tyres are 215/40 R18 and rim size is 18x7.5 (I THINK LOL) Rear Tyres are 245/45 r18 and rim size I think again is 18x8 Whats the max rim size I can put on these tyres? I think 18x8 on the front should be alright but the rears Im more worried about as most rims these days are 18x9.5 on the rears. And if I go bigger rim size I don't think I will have the issue of rubbing? Thanks so much guys |
09-13-2015, 11:37 PM | #2 |
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The stock 261Ms are 18x7.5 on the front and 18x8.5 on the rear.
Stock runflats are 215 fronts and 245 rears as you have stated, However I have had 225 up front and 255 on the rear with no issues at all on these rims. I have had 18x8 +38 and 18x9 +38 with the 245/215 combination with no issues either (rear guards need to be rolled if you plan on lowering the car). I currently have the standard VMR/GTC fitment of 18x8.5 +45 fronts and 18x9.5 +50 rears with the 215/245 combination which I find is a bit too skinny. Hope this gives you a rough idea of fitment on these cars! |
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09-13-2015, 11:51 PM | #3 |
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Personally I think you would get more enjoyment out of the car by replacing the runflats with normal tyres. Ride quality, grip, and probably wear are all going to be better vs the runflats.
I would also imagine run flats wouldn't work well on a stretched fitment because of the solid sidewalls?
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09-14-2015, 02:43 AM | #4 | |
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I don't think I want to lower the car anymore, I'm pretty happy with the m sport suspensions ride height, might be to high for everything one else but Im the type to be yellow stickered due to every other car ive had lol |
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09-14-2015, 02:45 AM | #5 | |
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09-15-2015, 06:23 PM | #7 |
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I think as long as your offsets are fine you're probably ok to fit any reasonable width wheel with those width tyres. The most common wider width is 18 x 8.5 front and 18 x 9.5 rear with the right offset. With stretching you could probably go wider and poke the rim but as vtl said, I'm not too sure whether stretching RFTs will work. You're best to ask a tyre shop with experience fitting RFTs whether they can be stretched or not.
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09-15-2015, 10:27 PM | #9 | |
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Want to go 18x9.5 on the rear but that's IF it can be done haha if I cant then I will have to go 18x8 or 8.5 Thanks for your help and advice! |
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09-16-2015, 12:16 AM | #10 | |
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According to tirerack, http://www.tirerack.com/tires/tires....nza+RE050A+RFT, you can do it but still better to check with your local dealer.
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09-16-2015, 02:44 AM | #11 | |
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I'll definitely still go check before purchasing, Will post photos once I get it done |
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09-16-2015, 05:31 PM | #12 | ||
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The "Measured Rim" for the 215 OE tyre is 7.5" while for the OE 245 tyre it is 8.5". It is generally accepted that if a tyre is fitted to a wheel larger than the Measured Rim then 0.2" will need to be added to the tyre's sectional width for each 0.5" increase in wheel width, as stamped on the wheel. Now consider using 8" front and 9" rear wheels, as stamped by the manufacturer, which are actually 9" and 10", respectively, total wheel width including flanges. If you were to fit those same run-flat tyres on, the tyres' section width increases by 0.2" to 9.0" and 10.0", which are now a perfect match to the new wheels. Being run-flat tyres, the sidewall is much stiffer and , therefore, less amenable to being stretched, so it's probably wiser to use wheels that are the same width as, or perhaps 0.5" wider than, the OE wheel. |
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