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Old 04-18-2014, 10:47 AM   #1
NasbaRex
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Default Is there a real benefit to 265/35/18 x 9.5

So as I have begun my wheel shopping for my 15 I have seen everyone jump on the 18x9.5 band wagon. Dont get me wrong, it seems to be the way to go for fitment. My question is, is there a real handling benefit from going all the way up to 18x9.5? Once you go above lets say 245/40/18 x 8.5 will you be sacrificing any handling for style?

I want a wheel and tire package that looks good, but i want to maximize ride quality too.
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Old 04-18-2014, 11:09 AM   #2
yo vanilla
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there's a lot of factors at rest but in situations like this i always recall a test that GRM did with a FD RX7 which concluded too wide of a tire slowed the car down.
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Old 04-18-2014, 11:12 AM   #3
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Ride quality or performance?

There really isn't enough horsepower in that car at the moment to warrant a 265/35.

I like the steering feel of a wider tire, it looks nice, but you could get away with a much cheaper, lighter tire.
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Old 04-18-2014, 11:36 AM   #4
NasbaRex
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Quote:
Originally Posted by yo vanilla View Post
there's a lot of factors at rest but in situations like this i always recall a test that GRM did with a FD RX7 which concluded too wide of a tire slowed the car down.
This is always true if your lager wheel/tire package is heavier than the old one, but at the same weight or less is what im curious about.


Quote:
Originally Posted by colin1234567 View Post
Ride quality or performance?

There really isn't enough horsepower in that car at the moment to warrant a 265/35.

I like the steering feel of a wider tire, it looks nice, but you could get away with a much cheaper, lighter tire.
How sloppy does it make initial turn in?
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Old 04-18-2014, 11:40 AM   #5
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There is a big difference with a much wider and lower profile tire, as compared to stock, in terms of handling. However, that being said, I would say it isn't worth it unless you do track days with your car, since the extra expense and NVH associated with a much wider/lower profile tire isn't worth the gains associated with cornering performance on the street. And as others have mentioned, there would be no braking/acceleration performance gains since the stock power/tq and brakes are by far the limiting factor, not your wheels/tires.

Like any aftermarket part, its true potential is "unlocked" when you do a whole slew of performance upgrades.
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Old 04-18-2014, 11:57 AM   #6
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^truth

I guess im just waffling between 245/40/18 x 8.5 and 265/35/18 x 9.5.
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Old 04-18-2014, 11:58 AM   #7
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The lower offset wheel will affect the steering. Going from stock wrx, the 18x9.5 +42 I noticed the steering was a little more vague and now follows the crowns in the road surface more. Didn't do that before. It's a well discussed thing just search.
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Old 04-18-2014, 12:01 PM   #8
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Quote:
Originally Posted by Dmochowski View Post
The lower offset wheel will affect the steering. Going from stock wrx, the 18x9.5 +42 I noticed the steering was a little more vague and now follows the crowns in the road surface more. Didn't do that before. It's a well discussed thing just search.
I think thats more of a problem with the wide wheels tramlining down the road following the grooves or crowns. Offset may have a little to do with it. I wonder if a low offset narrow wheel and tire would do the same?
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Old 04-18-2014, 12:16 PM   #9
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Basing my statement on my research and how it felt immediately after the install. This is a quote from the machv thread on wheel fitment.

" Secondly, as the offset gets lower your wheel centerline is getting farther and farther away from the axis of your steering. The steering feel gets messed up -- to me it feels vague and it tends to want to steer left and right on acceleration or braking, due to the wheel trying to pivot around the steering axis. This effect gets worse with lowering. "


It could be more width but from my reading offset has a large role in this and since it had a drastic change after I am assuming that's the cause. Of course I don't have same sized wheels and tires in a stock offset to test the theory haha.
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Old 04-18-2014, 12:23 PM   #10
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Old 04-18-2014, 12:55 PM   #11
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Quote:
Originally Posted by Dmochowski View Post
Basing my statement on my research and how it felt immediately after the install. This is a quote from the machv thread on wheel fitment.

" Secondly, as the offset gets lower your wheel centerline is getting farther and farther away from the axis of your steering. The steering feel gets messed up -- to me it feels vague and it tends to want to steer left and right on acceleration or braking, due to the wheel trying to pivot around the steering axis. This effect gets worse with lowering. "

It could be more width but from my reading offset has a large role in this and since it had a drastic change after I am assuming that's the cause. Of course I don't have same sized wheels and tires in a stock offset to test the theory haha.
Interesting. I trust what you are saying but would be a good experiment! My girlfriends charger is on 22x9.5 with 265/40/22 and its actually not all that bad. I think the offset is like +15. No poke lol. Horizontally flush.
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Old 04-29-2016, 04:39 PM   #12
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Quote:
Originally Posted by Scoobiesdoobies View Post
I think thats more of a problem with the wide wheels tramlining down the road following the grooves or crowns. Offset may have a little to do with it. I wonder if a low offset narrow wheel and tire would do the same?
I had 20mm spacers on stock wheels before switching to 9.5 +40 wheels and it feels similar with following road crown, so +1 with it being the offset
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Old 04-30-2016, 07:32 PM   #13
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Quote:
Originally Posted by NasbaRex View Post
So as I have begun my wheel shopping for my 15 I have seen everyone jump on the 18x9.5 band wagon. Dont get me wrong, it seems to be the way to go for fitment. My question is, is there a real handling benefit from going all the way up to 18x9.5? Once you go above lets say 245/40/18 x 8.5 will you be sacrificing any handling for style?

I want a wheel and tire package that looks good, but i want to maximize ride quality too.
get 17x9s with a 255 40 best of both worlds

no need for 18 bc not sti no brembos.
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Old 05-06-2016, 01:02 PM   #14
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Quote:
Originally Posted by Dmochowski View Post
feels vague and it tends to want to steer left and right on acceleration or braking, due to the wheel trying to pivot around the steering axis. This effect gets worse with lowering.
This is what I've experienced in the the past on other vehicles and what I'm trying to avoid with my 16 w/stock 18x8.5 . I want to upgrade the wheels for purely aesthetic reason, but I absolutely love how this car steers and handles and don't want to degrade it. I'm to the point now where I might just leave the stockers on.
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Old 03-22-2017, 10:06 PM   #15
Shtngit88
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Quote:
Originally Posted by Dmochowski View Post
Basing my statement on my research and how it felt immediately after the install. This is a quote from the machv thread on wheel fitment.

" Secondly, as the offset gets lower your wheel centerline is getting farther and farther away from the axis of your steering. The steering feel gets messed up -- to me it feels vague and it tends to want to steer left and right on acceleration or braking, due to the wheel trying to pivot around the steering axis. This effect gets worse with lowering. "


It could be more width but from my reading offset has a large role in this and since it had a drastic change after I am assuming that's the cause. Of course I don't have same sized wheels and tires in a stock offset to test the theory haha.
Yeah, this is not just a theory. It is true. Picture it this way.. if you take two pieces of paper on a table side by side and put a finger on each one on the middle of the paper the pieces of paper slide straight forward. Put your fingers on the inside edges of the paper and slide forward, the inside corners come forward first.

Hence the tow out on turns tendency increase when neg offset increases and compounds with suspension travel. Bingo.
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