Tires/Wheels Does going from 19 to 18 make big diff in comfort? - Subaru Impreza WRX STI Forums: IWSTI.com
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Does going from 19 to 18 make big diff in comfort?
Does going from 19 to 18 make big diff in comfort?
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Old 06-23-19, 08:44 AM   #1
mikezz
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Default Does going from 19 to 18 make big diff in comfort?

Just wondering for people who had the OEM 19s and later went to 18s with 245/40, was there a noticeable increase in ride comfort over less than perfect roads?

I'm finding the stock susp for some reason super stiff on this new 19' STI. I don't remember it being so stiff on the test drive. It was firm but had some compliance. I'm not sure if it 'loosens up' over time? I figure going to 18s with more sidewall could be good in the mean time, but not sure how much of a difference it makes.

Appreciate any replies!

Last edited by mikezz; 06-23-19 at 09:33 AM.
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Old 06-23-19, 01:41 PM   #2
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Default Re: Does going from 19 to 18 make big diff in comfort?

I have talked to Subiespeed about going to an 18 inch rim and unless they get the ok from the manufacturer,Enkei,it's every man for himself!
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Old 06-23-19, 11:55 PM   #3
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Default Re: Does going from 19 to 18 make big diff in comfort?

I own a 2018 and switching from the stock 19'' wheels to aftermarket 18'' wheels wrapped in 245/40r18 tires made a huge difference in comfort. I noticed that prior to the switch to 18'' wheels, I would clench my teeth whenever I would go over a speed bump or hit a minor pot hole. Now with the 18'' wheels installed, I no longer have to anticipate the stiffness that I got with the 19'' wheels. A prime example would be going over railroad tracks. With the 18's, I can breeze through them without having too much discomfort unlike with the 19's where I would have to slow down significantly and soak the stiffness.
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Old 06-24-19, 01:26 AM   #4
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Default Re: Does going from 19 to 18 make big diff in comfort?

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Originally Posted by aka View Post
I own a 2018 and switching from the stock 19'' wheels to aftermarket 18'' wheels wrapped in 245/40r18 tires made a huge difference in comfort. I noticed that prior to the switch to 18'' wheels, I would clench my teeth whenever I would go over a speed bump or hit a minor pot hole. Now with the 18'' wheels installed, I no longer have to anticipate the stiffness that I got with the 19'' wheels. A prime example would be going over railroad tracks. With the 18's, I can breeze through them without having too much discomfort unlike with the 19's where I would have to slow down significantly and soak the stiffness.

Thank you for your experience and insight. This is very helpful info. This will likely be the next thing I do ...
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Old 06-24-19, 01:55 AM   #5
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Default Re: Does going from 19 to 18 make big diff in comfort?

I use 18" rims on my RA for the winter. Big comfort difference indeed. I also use Michelin AS3+ all seasons which help as well. Little more flex in the all season sidewalls
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Old 06-24-19, 10:45 AM   #6
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Default Re: Does going from 19 to 18 make big diff in comfort?

I switched to 18s and the ride is better, plus and the OEM wheels weigh a ton. Best of both worlds.
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Old 06-24-19, 04:15 PM   #7
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Default Re: Does going from 19 to 18 make big diff in comfort?

and no issues with the Brembos?
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Old 06-24-19, 06:48 PM   #8
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Default Re: Does going from 19 to 18 make big diff in comfort?

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Originally Posted by Bigkitty View Post
and no issues with the Brembos?

You have to make sure they clear, but there are a lot of options out there now that clear brembos just fine.
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Old 06-25-19, 12:52 AM   #9
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Default Re: Does going from 19 to 18 make big diff in comfort?

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and no issues with the Brembos?
I went with last gens BBS and had them powder coated so no issues with fitment.
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Old 06-25-19, 08:31 AM   #10
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Poster to a different thread -got booted, had to sign in again, and post in the wrong thread!


Quote:
Originally Posted by Barry View Post
I also use Michelin AS3+ all seasons which help as well. Little more flex in the all season sidewalls
While I'm here I'll say that it is not a given that all season tires are softer than summers. My MPSS are much softer and ride nicer than the Potenza RE970 ? or 980 I used to run in the winter. Actually in terms of "tracking", the MPSS sidewalls are kind of poor. Don't think I'll be running another set.

Added: adding detail, MPSS have more grip than any As tires I've run, but their mushy sidewalls reduce road feel, and in turns, are far from confidence inspiring - even on the street.

Last edited by mheyman; 06-27-19 at 05:12 AM.
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