Can I change my tire size : 225 to 275 (OEM 18 '' wheels)
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Can I change my tire size : 225 to 275 (OEM 18 '' wheels)
Hi all,
After using the search engine... I didn't find my answer...but I read some threads plus I read in the top 100 common questions.
As you will see I'm not a tire expert but here's my question :
I own a 06 ZR with the stock : suspension / tires / rims :
225/45R18 front and 245/45R18 rear
If I keep the same rim (OEM) and I would like to change my tires for
245/40R18 - rear 275/40R18
1. Since the rim has the same width, the tire should not be larger right ? If it's possible to do, I'm affraid that with the stock splash guard I'm gonna chip and sandblast the whole side of my car because the tire might be larger...
2 Do I have to touch my fender ???
If any of you have done this, or can comment, your help will be appreciate.
Thanks in advance
After using the search engine... I didn't find my answer...but I read some threads plus I read in the top 100 common questions.
As you will see I'm not a tire expert but here's my question :
I own a 06 ZR with the stock : suspension / tires / rims :
225/45R18 front and 245/45R18 rear
If I keep the same rim (OEM) and I would like to change my tires for
245/40R18 - rear 275/40R18
1. Since the rim has the same width, the tire should not be larger right ? If it's possible to do, I'm affraid that with the stock splash guard I'm gonna chip and sandblast the whole side of my car because the tire might be larger...
2 Do I have to touch my fender ???
If any of you have done this, or can comment, your help will be appreciate.
Thanks in advance
#2
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Can you? Yes.
Should you? Probably not. The widest recommended tire for the 18x8" wheel is 245. While a 275 will fit, it is not the optimal tire width for the wheel size. Your handling and ride quality may suffer as a result of squeezing such a wide tire on.
Should you? Probably not. The widest recommended tire for the 18x8" wheel is 245. While a 275 will fit, it is not the optimal tire width for the wheel size. Your handling and ride quality may suffer as a result of squeezing such a wide tire on.
Last edited by DavesZ#3; 01-08-2008 at 02:55 PM.
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You can, but I wouldnt. I think the best set up for stock wheels ( 18x8 & 18x8.5 ) is 245's front and 255s back.. or maybe 265s back. 245s and 255s is what I see most people use.
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Thanks for all your inputs.
your right about wheels Black Z Eddie and ZthirtyThr33 :
Front
Size: 18x8.0
Offset: +30mm
Weight: 24.4
Tire: 225/45/18
Rear
Size: 18x8.5
Offset: +33mm
Weight: 25.8
Tire: 245/45/18
So front rim to go 255 should be 8.5 - 10 in
Rear to go 275 should be 9 - 11 in
with these measure My OEM rim, Touring 18" v.2 won't fit.
But if my rims was larger a bit, the match was perfect for the ratio and speed difference roughly 1%
Black Z Eddie I prefer to use this calculator... http://www.1010tires.com/TireSizeCalculator.asp
About you DavesZ#3 :
I didn't wanna too large but I had a good price for these tire.
At this point I will keep the standard sizes. As per the calculator the other size in between won't fit as well.
I continu to read your feedback and I would like to thank all of you.
your right about wheels Black Z Eddie and ZthirtyThr33 :
Front
Size: 18x8.0
Offset: +30mm
Weight: 24.4
Tire: 225/45/18
Rear
Size: 18x8.5
Offset: +33mm
Weight: 25.8
Tire: 245/45/18
So front rim to go 255 should be 8.5 - 10 in
Rear to go 275 should be 9 - 11 in
with these measure My OEM rim, Touring 18" v.2 won't fit.
But if my rims was larger a bit, the match was perfect for the ratio and speed difference roughly 1%
Black Z Eddie I prefer to use this calculator... http://www.1010tires.com/TireSizeCalculator.asp
About you DavesZ#3 :
I didn't wanna too large but I had a good price for these tire.
At this point I will keep the standard sizes. As per the calculator the other size in between won't fit as well.
I continu to read your feedback and I would like to thank all of you.
Last edited by brix; 01-08-2008 at 05:06 PM.
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#8
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The smaller your wheel height and the greater the aspect ratio, the more flexibility you have when mounting wide tires (i.e., mounting tires with widths that go beyond the manufacturers recommendation).
To provide an example that takes this argument to its extreme: I found that I could easily mount a high profile 275mm width tire on my serious off-road 4WD vehicle equipped with 15x8” wheels. That works because the small diameter wheel uses a high profile (aspect ratio) tire. This arrangement (small diameter wheel with high aspect ratio tire) provides a lot of latitude when selecting a tire width.
On the Z, a 17” wheel is more forgiving when mounting various tire widths since the 17” uses a higher profile tire. You have some latitude here. Notice that many Z drivers successfully mount some pretty wide tires on 17x8” wheels.
But, going to an 18” wheel (and of course a 19” wheel is even less forgiving), the profile (aspect ratio) is smaller, to the point you need to respect the tire’s manufacture’s recommendation matching tire width to wheel width. A 275/40-18” tire on a 18x8” wheel (or even a 18x8.5” wheel) provides disappointing handling characteristics at best, and a totally bad arrangement at its worst.
--Spike
To provide an example that takes this argument to its extreme: I found that I could easily mount a high profile 275mm width tire on my serious off-road 4WD vehicle equipped with 15x8” wheels. That works because the small diameter wheel uses a high profile (aspect ratio) tire. This arrangement (small diameter wheel with high aspect ratio tire) provides a lot of latitude when selecting a tire width.
On the Z, a 17” wheel is more forgiving when mounting various tire widths since the 17” uses a higher profile tire. You have some latitude here. Notice that many Z drivers successfully mount some pretty wide tires on 17x8” wheels.
But, going to an 18” wheel (and of course a 19” wheel is even less forgiving), the profile (aspect ratio) is smaller, to the point you need to respect the tire’s manufacture’s recommendation matching tire width to wheel width. A 275/40-18” tire on a 18x8” wheel (or even a 18x8.5” wheel) provides disappointing handling characteristics at best, and a totally bad arrangement at its worst.
--Spike
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Originally Posted by Spike100
A 275/40-18” tire on a 18x8” wheel (or even a 18x8.5” wheel) provides disappointing handling characteristics at best, and a totally bad arrangement at its worst.--Spike
Thanks for having take the time to do the ''scientific'' explanation. That's more clear in my head and you won't see that often .
That's a good reason to stay with the stock measure. Security and handling. my car will be more predictable with 255....
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The two most common questions here are
What's the biggest?
and
What's the smallest?
There is no correct answer. If you are interested in looks, do as you wish. If you are interested in handling, match wheel and tire width for the greatest surface contact print. That generally involves wider wheels for wider tires.
What's the biggest?
and
What's the smallest?
There is no correct answer. If you are interested in looks, do as you wish. If you are interested in handling, match wheel and tire width for the greatest surface contact print. That generally involves wider wheels for wider tires.
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this thread ... https://my350z.com/forum/wheels-and-tires/325123-wider-stock-tires.html
talk about the same subject
talk about the same subject
#13
New Member
Originally Posted by davidv
The two most common questions here are
What's the biggest?
and
What's the smallest?
There is no correct answer. If you are interested in looks, do as you wish. If you are interested in handling, match wheel and tire width for the greatest surface contact print. That generally involves wider wheels for wider tires.
What's the biggest?
and
What's the smallest?
There is no correct answer. If you are interested in looks, do as you wish. If you are interested in handling, match wheel and tire width for the greatest surface contact print. That generally involves wider wheels for wider tires.
I would suggest a reader on the thread listens to your advice, and then searches… and searches again, and again… and then reaches Nirvana (the correct solution for the specific result they want).
I realize my advice (and yours for that matter) is somewhat vague, but there are just so many options, conclusions, and desired results (i.e., esthetics, performance, handling, etc.).
--Spike
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Originally Posted by davidv
There is no correct answer. If you are interested in looks, do as you wish. If you are interested in handling, match wheel and tire width for the greatest surface contact print. That generally involves wider wheels for wider tires.
Originally Posted by Justin07Z
With 18x8 fronts, I'd do 245/40 18
With 18x8.5 rears, I'd do 265/40 18
Those are both assuming you are after width .
With 18x8.5 rears, I'd do 265/40 18
Those are both assuming you are after width .
Originally Posted by Spike100
I realize my advice (and yours for that matter) is somewhat vague, but there are just so many options, conclusions, and desired results (i.e., esthetics, performance, handling, etc.)..
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And I suppose if you *really* want to push the limits you could do a 255/40 18 front and a 275/40 18 rear, but I don't think I would go wider than the 265 out back. Maybe 255 front 265 rear for less understeer?
#17
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Originally Posted by SyNicaLZ33
How would it effect my handling if I go with these measurements?
225/45 18x8 fronts
255/45 18x8.5 rear
225/45 18x8 fronts
255/45 18x8.5 rear
vs.
front 225/45-18” and rear 245/45-18.5”
A 10mm difference is not significant.
You will notice a difference if you go “all square widths”… front 245/40 and rear 245/45. This configuration provides nearly neutral steer.
--Spike
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I've fit a 285 tire on an 8" wide rim before. However, with the small aspect ratio, the tire bulged and my contact patch with the road was actually less than it was with a 245 wide tire. If you're going for looks, it's one thing, but from a performance standpoint, not a good idea.
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Originally Posted by brix
Thanks for all your inputs.
your right about wheels Black Z Eddie and ZthirtyThr33 :
Front
Size: 18x8.0
Offset: +30mm
Weight: 24.4
Tire: 225/45/18
Rear
Size: 18x8.5
Offset: +33mm
Weight: 25.8
Tire: 245/45/18
your right about wheels Black Z Eddie and ZthirtyThr33 :
Front
Size: 18x8.0
Offset: +30mm
Weight: 24.4
Tire: 225/45/18
Rear
Size: 18x8.5
Offset: +33mm
Weight: 25.8
Tire: 245/45/18
Lou
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Originally Posted by lowrider
That is not correct. The 8" wide 5 spoke wheel didn't come to the "Z" until '06.