225 vs 235 tires
Results 1 to 15 of 15

This is a discussion on 225 vs 235 tires within the Suspension & Wheels forums, part of the Tech & Modifying & General Repairs category; I have an 09 WRX that came stock with 225 45 17 tires , I noticed that the newer WRX's ...

  1. #1
    Registered User
    Join Date
    Nov 2012
    Posts
    19

    225 vs 235 tires

    I have an 09 WRX that came stock with 225 45 17 tires , I noticed that the newer WRX's come with 235 /45 /17 tires ...
    my question is : can I mount these bigger tires on my car ? I think the slightly bigger tires will look better ...anybody done this ?
    Does it effect the computer or anti -skid ?

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Registered User wrx1234's Avatar
    Join Date
    Sep 2009
    Location
    Dover DE
    Posts
    616
    Yes you can mount slightly wider tires but you would be better off adding sways if you want to improve traction. Slightly wider tires wont grip much more... not enough for you to notice unless you got stickier tires. As for looking better they will balloon out a tad but they wont look much different.
    2009 WRX - Catted DP, Torqued performance stage 2
    2011 Sportwagon TDi
    1970 Chevy Impala Convertible 454

  4. #3
    Registered User
    Join Date
    Nov 2012
    Posts
    19
    I would be adding only for looks , the car handles like it's on rails already .

  5. #4
    Lando Calrissian DemonWRX's Avatar
    Join Date
    Jul 2011
    Location
    Cloud City, Bespin
    Posts
    3,186
    I Support ClubWRX
    the 235/45 will be 1.4% bigger....so when your speedo reads 100, you are actually going 101.4....so no real change to any of that. It might ever so slightly effect your alignment, so you might want to have that done for even wear....though if you are on stock alignment currently, that would be an improvement mod as well
    Stink-Eye Mob #39
    N.E.R.D. Operative #8

  6. #5
    Good news, everyone! xxxxxxxAnub1s's Avatar
    Join Date
    Jan 2005
    Location
    Eh, whaaaaa?
    Posts
    3,855
    I Support ClubWRX
    Quote Originally Posted by 09bluewrx View Post
    I would be adding only for looks , the car handles like it's on rails already .
    That makes absolutely no sense.
    Cody
    Hawk-Eye Alliance #727 N.E.R.D #255.255.255.0

    Your nighttime volunteer of near-useless information.
    Good news, everyone!

  7. #6
    Registered User A265's Avatar
    Join Date
    Mar 2009
    Posts
    741
    I think 235's on a 7 inch wheel might be pushing it. Did you change your wheels or are you planning on buying new ones?

  8. #7
    Registered User
    Join Date
    Jun 2012
    Location
    Boca Raton, FL
    Posts
    171
    Look at the specific brand and model tire. Should be no problem with a 235/45/17 or a 235/40/17. I went from 235/45/17 on the wifes car to a 245/40/17 and the car looked better and the tire was 2% shorter

  9. #8
    Registered User Annihilator817's Avatar
    Join Date
    Oct 2011
    Location
    New England
    Posts
    184
    I'd defintely go with the 235/40/17 over the 235/45/17.

    235/45/17's (and even 225/45/17) are really tall tires. They will REDUCE the amount of torque you are able to put to the ground. And on the WRX with it's rediculously long second gear, a little gearing reduction via the tires works wonders.

    You can definitely fit 235/40/17's on a 7" wheel. You can even fit 245/40/17's on a 7" wheel without the tread deforming.
    Good judgement comes from experience, and experience comes from bad judgement.

  10. #9
    Registered User
    Join Date
    Nov 2012
    Posts
    19
    Quote Originally Posted by Anub1s View Post
    That makes absolutely no sense.
    I would like to fill out the wheel wells a little ...

  11. #10
    Lando Calrissian DemonWRX's Avatar
    Join Date
    Jul 2011
    Location
    Cloud City, Bespin
    Posts
    3,186
    I Support ClubWRX
    going from 225 to 235 makes the tread 10mm wider. With an aspect ratio of 45, that willmake your sidewalls about 3mm or so taller, which means you will likely not notice just looking at it.

    If you want to fill outthe wheel wells, you would want to go to 18" wheels with 235/45R18 tires. This will, however throw your speedo off by 5.4%....meaning when your speedo reads 60mph you will really be going 63mph. This will be fine as long as you adjust your driving accordingly and realize you will be falsifying your odometer (which may or may not be a legal issue)
    Stink-Eye Mob #39
    N.E.R.D. Operative #8

  12. #11
    Registered User Venom351R's Avatar
    Join Date
    Oct 2010
    Location
    Maine
    Posts
    326
    Quote Originally Posted by DemonWRX View Post
    If you want to fill outthe wheel wells, you would want to go to 18" wheels with 235/45R18 tires. This will, however throw your speedo off by 5.4%....meaning when your speedo reads 60mph you will really be going 63mph. This will be fine as long as you adjust your driving accordingly and realize you will be falsifying your odometer (which may or may not be a legal issue)
    Can that be adjusted with a Cobb AP? I was wanting to go up to 18's but was unsure what it would do MPH wise or actual mileage driven.
    2007 WRX STI- Stock 13.8@102

  13. #12
    Lando Calrissian DemonWRX's Avatar
    Join Date
    Jul 2011
    Location
    Cloud City, Bespin
    Posts
    3,186
    I Support ClubWRX
    No, it can not.

    Subaru is one of the only car manufaturers with a cult enthusiast following that does not give you access to change this. I have been around and around with not only my local dealer, but 3 different SOA reps about this. No way to change it.

    According to SOA, that is handeled by the BCM (body control module) which can not be accessed. There is a slight chance that you could swap your WRX BCM for an STI BCM to correct this, but I have no way of validating that....just a theory I have....as far as I know, no one has done that as of yet.
    Stink-Eye Mob #39
    N.E.R.D. Operative #8

  14. #13
    The Fruit mangostick's Avatar
    Join Date
    Oct 2009
    Location
    VB VA .. the ghetto on the sea
    Posts
    4,735
    I found that my 2010 read slightly high on the factory wheels/tires (a couple mph or so depending on speed) so when I switched to the '11 wheels and tires (factory set) It read dead on. Now, by gps its also dead on@ highway speeds. Again to reiterate.. this was a factory wheel/tire combo from 2010 and a factory wheel/tire combo from a 2011 fitted to my 2010 car.

    FYI, there are no set standards for overall width on tires. One mfr 235 can be up to 245 wide and vice versa. If you're going to put a wider tire on the car, get wider wheels that properly match the new tire width. Its safer that way and maintains proper handling characteristics. Sure it might not distort the "tread" but a wide tire on a narrow wheel does really interesting things to the sidewall. Just like a narrow tire on a wide wheel is also a bad Idea. Even though its stupidly (as well as just plain stupid) popular right now.
    OBP 2010 5dr *traded*
    SWP 2013 FRS
    My name is Shawn, I'm a Devout Practicalist and I'm addicted to flat4's
    This page has had 1,666 visits
    SUCH IS MANGO!

  15. #14
    Registered User DiRty Impreza's Avatar
    Join Date
    Jun 2011
    Location
    Canton, Ohio
    Posts
    204
    don't do 235/40/17, your car will ride a lot rougher. you'll feel it in the suspension more, and more likely to bend a rim. Specially if you live in Ohio you won't feel, or barley notice a difference from 225 to 235. If your going for looks buy a wider and taller rim, that will fill your wheel well, and allow you to put wider tires on without a problem. 18x8 is a good choice, 18x8.5 = perfection.
    ++ + ++P3LLA++ + ++

    06 STi ( Stage II ) BOOSTED
    HAWK-EYE ALLIANCE # 808

  16. #15
    Registered User Venom351R's Avatar
    Join Date
    Oct 2010
    Location
    Maine
    Posts
    326
    Quote Originally Posted by DemonWRX View Post
    No, it can not.

    Subaru is one of the only car manufaturers with a cult enthusiast following that does not give you access to change this. I have been around and around with not only my local dealer, but 3 different SOA reps about this. No way to change it.

    According to SOA, that is handeled by the BCM (body control module) which can not be accessed. There is a slight chance that you could swap your WRX BCM for an STI BCM to correct this, but I have no way of validating that....just a theory I have....as far as I know, no one has done that as of yet.

    I already have an STI, how does that change things?
    2007 WRX STI- Stock 13.8@102

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •