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Old 01-21-2004, 07:24 AM   #1
Wacky
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Question 215/45/17 or 225/45/17

I am picking up a set of 17in Rota Tarmac II's for my 2003 WRX Sedan and have seen both 215/45/17 and 225/45/17 as viable options for tire size. Any advantage between those two sizes? I currently haven't lowered my car at all, but I plan on doing so this spring with either the Prodrives or the Eibach's so the drop will not be excessive. I am leaning towards the Pirelli PZero Nero M&S if that helps as well. Thanks.

Scott
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Old 01-21-2004, 01:27 PM   #2
aberg
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bump
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Old 01-21-2004, 01:47 PM   #3
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I'd go with 225... they look better and you'll have a more contact with the ground. I can't really see any reason not to go with 225s.

Sergi
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Old 01-21-2004, 02:34 PM   #4
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in addition to more rubber on the road, the 225 also has more sidewall, so it'll be a little less likely to be damaged by potholes and such.
-g
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Old 01-21-2004, 03:29 PM   #5
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what about rolling diameter and overall weight? anyone a proponent of the 215?

Scott
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Old 01-21-2004, 03:33 PM   #6
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Go 225. It will protect your rim more from any curbs, etc. Plus it looks better. Nothing looks worse than a tire that looks skinnier than the rim
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Old 01-21-2004, 04:19 PM   #7
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rolling diameter of 225 is closer to OEM 205/55 r16.

http://www.miata.net/garage/tirecalc.html
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Old 01-21-2004, 06:49 PM   #8
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Quote:
Originally posted by gordon
rolling diameter of 225 is closer to OEM 205/55 r16.

http://www.miata.net/garage/tirecalc.html
yes this is true. do the math, 225-45-17 comes out to be almost exactly the same diameter of stock 205-55-16, so your speedo and gearing wont change. of course the section width of every 225-45 tire is different due to varying manuf specs. i can tell you that bridgestone re-070's that come on the sti are pretty much the same diameter as our re-92. im assuming because theyre both bridgestones, so all their ratios for their different tires will remain consistent.

if you plan on getting AS tires, get 225, the added dry grip is nice especially when you have AS tires and are compromising dry grip for cold grip.
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Old 01-22-2004, 04:59 AM   #9
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225/45/17 is pretty much what i've heard (and recommend) for people to use on their 17 x 7.5 rotas....

however i'd like to hear from someone who have put on 215 on a their rex sedan...

good luck either way.

SD
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Old 01-22-2004, 07:58 AM   #10
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Increased tire width does not put a larger contact patch on the ground. The contact patch size is largely a function of tire pressure. What a wider tire will give you is a contact patch that is shaped more like a thin horizontal rectangle than a square.
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Old 01-22-2004, 03:03 PM   #11
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I put 225/45/17 Pirelli Pzero Nero m/s's on last week. I had 215/45/17 Sumitomo htrzII's before. i feel the Pirelli's handle a lot better than both the sumitomo's and stock tires. The car turns in MUCH quicker now. i was surprised at the difference. I am lowered on Cusco Zero2's and dont have any noticable rubbing
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Old 01-29-2004, 02:27 AM   #12
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HongKong, what size wheels? 17X? and the offset?
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Old 01-29-2004, 09:46 AM   #13
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go with 225!

you non-GC8 guys are lucky...225/45/17 on a stock GC RS would probably rub!!!
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Old 01-29-2004, 11:08 AM   #14
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You should really only run 215 if you have a 7 inch wide wheel, even then you can still run 225 if you want. The only advantage to the 215 is it will effectively give you better gearing, which means quicker accelleration. But on the Rota wheels, which are all 7.5" wide, you should run 225/45/17. If you want to get even wider you could go 235/40/17, but depending on the tire and how much you lower the car you could have rubbing issues. But I've seen lots of people on here run that size with no problems, even a few with wagons.

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Old 01-29-2004, 02:38 PM   #15
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kosoku: rota SDR's. 7.5 width
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