235/50 18 ok?
#1
235/50 18 ok?
This is probably going to be one of the stupidest questions you guys have encountered.
I am getting a 2003 G35 coupe, 18in rims tomorrow and it needs new tires, like really bad. Front are 3/32 and rear are 4/32. So it has 245/45 18's on the front and 265/45 18's on the back. I want something cheap, but that will be a decent tire (under $800 installed). So I was thinking of putting 235/50 18's all around but have no idea if it will work or not. I was looking this up and have read about VDC and ABS issues possibly, but it's not a guaranteed.
I was looking at Pirelli P-Zero Nero's which are about $754 installed at Discount Tire but wanted to make sure it was worth the purchase.
I tried to look this up before and couldn't find a real definitive answer so I apologize if I looked over it.
Thanks.
I am getting a 2003 G35 coupe, 18in rims tomorrow and it needs new tires, like really bad. Front are 3/32 and rear are 4/32. So it has 245/45 18's on the front and 265/45 18's on the back. I want something cheap, but that will be a decent tire (under $800 installed). So I was thinking of putting 235/50 18's all around but have no idea if it will work or not. I was looking this up and have read about VDC and ABS issues possibly, but it's not a guaranteed.
I was looking at Pirelli P-Zero Nero's which are about $754 installed at Discount Tire but wanted to make sure it was worth the purchase.
I tried to look this up before and couldn't find a real definitive answer so I apologize if I looked over it.
Thanks.
#2
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ThatOneDude (08-29-2011)
#5
I'd go with either factory sizes or 245/45's all around - either will work fine. 235/50's will be 4x4 city.
If you don't necessarily need the stickiest performance tires available for frequent at-the-limit driving, then I'd suggest considering the Kumho LX Platinum tires. They ride quiet and smooth like butter, and their treadwear rating of 600 is the highest I've ever seen. I have them on my car in factory sizes all around, and I couldn't be happier with them. You should be able to get into a full set of them for $750-ish or less, mounted, balanced, out the door.
Also, to extend the front tire life, you should really get a set of better compression rod bushings. Energy Suspension is one option, and you can get them from me for a very good price. I have them on my car, and I got 45K out of my last set of front tires.
Welcome to the G35 owners' group!
If you don't necessarily need the stickiest performance tires available for frequent at-the-limit driving, then I'd suggest considering the Kumho LX Platinum tires. They ride quiet and smooth like butter, and their treadwear rating of 600 is the highest I've ever seen. I have them on my car in factory sizes all around, and I couldn't be happier with them. You should be able to get into a full set of them for $750-ish or less, mounted, balanced, out the door.
Also, to extend the front tire life, you should really get a set of better compression rod bushings. Energy Suspension is one option, and you can get them from me for a very good price. I have them on my car, and I got 45K out of my last set of front tires.
Welcome to the G35 owners' group!
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What am I talking about you might ask? I use this site to help me determine what will work and what won't. http://www.miata.net/garage/tirecalc.html
So let's look at a stock setup for the coupe that had 19" rims staggered tires. Plugging in those tire sizes into the calculator you'll see the 225/40/19 Front tires in this set up have a rolling diameter of 26.1" and the 245/40s are 26.7". That's a difference of .6" or 2.25%. So no issues.
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So theoretically OP could run his 235/50/18 all around with no issues but I think those tires would be too tall for me. I like Gary's idea of running 245/45s a lot better. Hope this helps, let me know if you have any other questions
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ThatOneDude (08-29-2011)
#7
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Gary
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ThatOneDude (08-29-2011)
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#8
I bought my car used with 245-45-18 all 4 corners. when driving in heavy rain the car would sort of float thru the turn with the back end sliding out. My heart was in my throat in many cases...I feel the VDC was not working properly...I changed the front two tires out with the Kumho Platinum 225-45-18... now the car behaves really well also with a very quiet plush ride.
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moto_za (09-01-2011)
#10
Cant run the same size all around w/out having VDC issues.
Some threads on it,
https://g35driver.com/forums/wheels-...-question.html
http://www.myg37.com/forums/brakes-s...-now-this.html
http://my350z.com/forum/wheels-and-t...lip-light.html
I'd stick with the oem sizes as the oe wheels don't allow much in the way of plus zero sizing.
Some threads on it,
https://g35driver.com/forums/wheels-...-question.html
http://www.myg37.com/forums/brakes-s...-now-this.html
http://my350z.com/forum/wheels-and-t...lip-light.html
I'd stick with the oem sizes as the oe wheels don't allow much in the way of plus zero sizing.
#11
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Cant run the same size all around w/out having VDC issues.
Some threads on it,
https://g35driver.com/forums/wheels-...-question.html
http://www.myg37.com/forums/brakes-s...-now-this.html
http://my350z.com/forum/wheels-and-t...lip-light.html
I'd stick with the oem sizes as the oe wheels don't allow much in the way of plus zero sizing.
Some threads on it,
https://g35driver.com/forums/wheels-...-question.html
http://www.myg37.com/forums/brakes-s...-now-this.html
http://my350z.com/forum/wheels-and-t...lip-light.html
I'd stick with the oem sizes as the oe wheels don't allow much in the way of plus zero sizing.
Neal I'm going to respectfully disagree with you here. First, the threads you posted don't address running the same size all around, they all talk about people changing tire sizes and that's what caused the issues. All our cars really care about is that the rolling diameters of the tires F/R is less than 3% different to be happy. This has been discussed and proven many times over on this forum. So by running the same sizes all around you are actually making the car very happy.
I ran 235/45/18's all around when I bought the car and then rolled on 245/40/19 all around when I was on coupe 19's and never had an issue. And remember,every 03-06 sedan produced came with same size tires all around on either 17" or 18" rims.
So taking into account what I just said above you need to figure out the difference in the diameters of your tires. This is a great site to help you with your calculations: http://www.miata.net/garage/tirecalc.html
The diameter of the 235/40 is 25.4" and the 245/45 is 26.7". That's a difference of 4.9% so your car will hate you and throw VDC, Slip, and possible ABS lights/codes and more than likely go into limp mode if you try to drive it that way. Your front tires would be 1.3" shorter than the rears and that won't work on the G. You'll have to change the sizes either front or rear to get w/in the 3% difference. Use the calculator I posted above to help you.
Last edited by Blue Dream; 09-01-2011 at 10:36 PM.
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#13
Neal I'm going to respectfully disagree with you here. First, the threads you posted don't address running the same size all around, they all talk about people changing tire sizes and that's what caused the issues. All our cars really care about is that the rolling diameters of the tires F/R is less than 3% different to be happy. This has been discussed and proven many times over on this forum. So by running the same sizes all around you are actually making the car very happy.
I ran 235/45/18's all around when I bought the car and then rolled on 245/40/19 all around when I was on coupe 19's and never had an issue. And remember,every 03-06 sedan produced came with same size tires all around on either 17" or 18" rims.
So taking into account what I just said above you need to figure out the difference in the diameters of your tires. This is a great site to help you with your calculations: http://www.miata.net/garage/tirecalc.html
The diameter of the 235/40 is 25.4" and the 245/45 is 26.7". That's a difference of 4.9% so your car will hate you and throw VDC, Slip, and possible ABS lights/codes and more than likely go into limp mode if you try to drive it that way. Your front tires would be 1.3" shorter than the rears and that won't work on the G. You'll have to change the sizes either front or rear to get w/in the 3% difference. Use the calculator I posted above to help you.
I ran 235/45/18's all around when I bought the car and then rolled on 245/40/19 all around when I was on coupe 19's and never had an issue. And remember,every 03-06 sedan produced came with same size tires all around on either 17" or 18" rims.
So taking into account what I just said above you need to figure out the difference in the diameters of your tires. This is a great site to help you with your calculations: http://www.miata.net/garage/tirecalc.html
The diameter of the 235/40 is 25.4" and the 245/45 is 26.7". That's a difference of 4.9% so your car will hate you and throw VDC, Slip, and possible ABS lights/codes and more than likely go into limp mode if you try to drive it that way. Your front tires would be 1.3" shorter than the rears and that won't work on the G. You'll have to change the sizes either front or rear to get w/in the 3% difference. Use the calculator I posted above to help you.
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