Welcome to the North American Subaru Impreza Owners Club Tuesday September 30, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Click here to visit TireRack
Tire & Wheel Forum sponsored by The Tire Rack

Losing traction? Need new tires?
Click here to visit the NASIOC Upgrade Garage...
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Tire & Wheel

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 04-09-2003, 10:44 AM   #1
JCampbell
Scooby Specialist
 
Member#: 25159
Join Date: Sep 2002
Chapter/Region: MWSOC
Location: Omaha
Vehicle:
- BrAkes stop you
BrEAks make you broken

Question 235 40 17 Owners

For those of you that are running this size, can you post your comments regarding them?
I'm not starting a "will they fit?" thread, that has been touched on in different threads.
What I want is opinions on pitfalls and benefits from those that actually have them. Please no conjecture from anyone that isn't running this size.

Thanks all!
* Registered users of the site do not see these ads.
JCampbell is offline   Reply With Quote
Old 04-09-2003, 11:01 AM   #2
omahasubaru
Scooby Guru
 
Member#: 1594
Join Date: Jun 2000
Chapter/Region: MWSOC
Location: Gretna, NE
Vehicle:
1995 WRX
2002 Legacy

Default

I know a certian someone who is local to us that is ordering a set today for his WRX sedan. I bet you know who it is too.

Sorry though as I have no tires in this size & won't likely ever fit these on my wagon without fender rolling.
omahasubaru is offline   Reply With Quote
Old 04-09-2003, 11:04 AM   #3
JCampbell
Scooby Specialist
 
Member#: 25159
Join Date: Sep 2002
Chapter/Region: MWSOC
Location: Omaha
Vehicle:
- BrAkes stop you
BrEAks make you broken

Smile

Quote:
Originally posted by omahasubaru
I know a certian someone who is local to us that is ordering a set today for his WRX sedan. I bet you know who it is too....
I think he ordered 225 45 17s, not 100% sure though. He ordered the Hankooks.

John

edit: Well, I'll be! He did order 235's...and I need to learn how to spell

Last edited by JCampbell; 04-16-2003 at 09:20 AM.
JCampbell is offline   Reply With Quote
Old 04-09-2003, 11:53 AM   #4
Cosworth
Scooby Specialist
 
Member#: 3887
Join Date: Jan 2001
Chapter/Region: Tri-State
Location: Middletown, NJ
Vehicle:
08 Taco, 98 M3/4/5
'00 RC51, '08 KTM

Default

I have just put on a set of tires in that size. 235/40/17 Bridgestone Potenza S-03's on an 17x8" Enkei RPF-1, ET45. Here some facts about my setup, the wheel/tire combo and some personal, perceptual conjecture.

This particular brand and size of tire (235/40/17 Potenza S-03) has a section width of 9.7" and a tread width of 8.5". The overall diameter of this tire is 1/2" shorter than stock at 24.5". Stock is 25" diameter so this should be more advantageous for gearing but not enough to throw everything off too much--its 2% smaller then stock which translates to reading 1 MPH less at 60 MPH. Realistically, not a cause for concern, but theoretically enough to ahve swayed my decision to buy it.

Previously i had 18" Rota Subzero's which were a rather light cast wheel for thier size. I could feel the added heft of the rolling stock and since my car is relatively stock in the power department, the difference was definitely discernable but not drastic. I figured that if one wants big grip from big rubber, this weight thing not something easily defeated. Either you spend big $$$ on forged wheels, or reduce your rolling diameter a bit to compromise. I went the latter route. Some may not agree with that point and i too wouldn't mind a forged wheel, this combo is a nice alternative, but its really a matter of tradeoffs. The wheels is semi-forged in a manner similar ot the SSR Competitions. Plus its 8" wide so i can better utilize a 235mm tire.

The sidewall height on this is in between a 225/45 and a 225/40. Exacly in the middle in fact. Its .25" larger than the 225/40 and .25" smaller than the 225/45 so its a nice compromise between the pillowy 225/45 and the harder 225/40 but that is subjective opinion.

I tend to like the looks of this tire a bit. My car is lowered and the tire just looks wide. From the smaller diameter of the 17" wheel and its dishedness combined with the wide tire, the combo just has a nice bold wide look. I liked the look of my old 18's with its wheelwell filling, wagon wheel look, but this combo gives the car a real hunkered down stance. Its still in the acceptable realm of size that it will not rub on a sedan. I have not found any rubbing and my fenders are stock (read: not rolled and rubber weatherstropping is still intact). For those of you with wagons, YMMV.

Here are some pics of this setup.

http://forums.nasioc.com/forums/show...hreadid=341826

here are some pics of clearances.

http://forums.nasioc.com/forums/show...71#post3660171
Cosworth is offline   Reply With Quote
Old 04-09-2003, 01:03 PM   #5
Red Rocket
Scooby Specialist
 
Member#: 10507
Join Date: Sep 2001
Vehicle:
'04 Ex STi Owner
'97 4Runner

Default

Cosworth - could you give us a section width measurement on your tires? I would assume the actual width is less because of the narrower rims.

I still like my 235/40-17 T1-s.

Kevin
Red Rocket is offline   Reply With Quote
Old 04-09-2003, 01:25 PM   #6
Cosworth
Scooby Specialist
 
Member#: 3887
Join Date: Jan 2001
Chapter/Region: Tri-State
Location: Middletown, NJ
Vehicle:
08 Taco, 98 M3/4/5
'00 RC51, '08 KTM

Default

Kevin, the only info i have is the one from Tirerack. According to TireRack, the measurements for the 235/40/18 Potenza S-03 s measured on a 8.5" wheel are:

section width = 9.7"
tread width = 8.5"

But being that i am only 5." less than thier measured baseline, i don't suspect that the widths would vary much. I can tell you that mounting this particular tire on the 8" wheel produces a fairly vertical sidewall. I've seen 225/40/18's mounted on 8" wide wheels and thier sidewall is very trapeziodally stretched. 8.5" might be the upper limit as to what one would actually want to use for this size tire. TR claims that up to a 9.5" wheel could be used but i think that would be stretching it a bit. (hehe, no pun intended)
Cosworth is offline   Reply With Quote
Old 04-09-2003, 03:02 PM   #7
twotacosfor99cents
Scooby Specialist
 
Member#: 14997
Join Date: Feb 2002
Chapter/Region: BAIC
Location: (□)
Default



235/40ZR17's AVS ES100's on 17x7.5 Formels.

No rubbing at all, even with a fully loaded car, on Prodrive springs.

Looks great too. I've noticed that the car seems snappier in the lower end too, so there is a gearing advantage.

-Ryan
twotacosfor99cents is offline   Reply With Quote
Old 04-09-2003, 03:12 PM   #8
JCampbell
Scooby Specialist
 
Member#: 25159
Join Date: Sep 2002
Chapter/Region: MWSOC
Location: Omaha
Vehicle:
- BrAkes stop you
BrEAks make you broken

Thumbs up Very nice

Quote:
Originally posted by twotacosfor99cents


235/40ZR17's AVS ES100's on 17x7.5 Formels...
-Ryan
I have the Battles @ 7.5"
As mentioned earlier in this thread and some others the rim should be 8" for the 235's but after seeing that picture, I couldn't imagine them on 8", they look perfect on 7.5".
JCampbell is offline   Reply With Quote
Old 04-09-2003, 03:24 PM   #9
omahasubaru
Scooby Guru
 
Member#: 1594
Join Date: Jun 2000
Chapter/Region: MWSOC
Location: Gretna, NE
Vehicle:
1995 WRX
2002 Legacy

Default

You should be fine with 215/45-17, 225/45-17, & 235/40-17 on your Rota's.

215/45-17 is a tad small (I'm running this size on my SDR's), 225/45-17 is pretty much perfect, 235/40-17 is just a tad large. I wouldn't worry. You could get away with 245/40's if you wanted too, but you'd have to roll your fenders (in the rear) & might have mild strut issues in the rear. 245/40-17 is closer to stock rolling diameter too!

You've had those wheels way too long. My wife has had her's on her car for over a month now. If you need to see them with 215/45-17's... let me know.

I sent you a couple PM's

Last edited by omahasubaru; 04-09-2003 at 03:35 PM.
omahasubaru is offline   Reply With Quote
Old 04-09-2003, 03:28 PM   #10
Cosworth
Scooby Specialist
 
Member#: 3887
Join Date: Jan 2001
Chapter/Region: Tri-State
Location: Middletown, NJ
Vehicle:
08 Taco, 98 M3/4/5
'00 RC51, '08 KTM

Default

JCampbell, you have to consider that not all 235's are created equal. For instance, i was at a vendors shop once and he showed me two separate stacks of tires, one was a 225 Bridgestone S-03 and the other was a 235 Toyo T-1S. The toyo, even though it was wider numerically, was not physically wider than the Bridgestone. So, it seems that some tires are more beefier than others. Generally speaking, It seems that the more "hardcore" or aggressive a tire is (max performance), the more tread width it will be packing for its size.

Another case where this is true (but nore of an anomoly) is the OEM Honda S2000 Bridgestone S-02. Its rear tire is a 225, but in actuality, it is wider than any 225 has been. When S2K owners shop for replacements they need to buy a larger size branded tire to match the OEM's girth.
Cosworth is offline   Reply With Quote
Old 04-09-2003, 05:10 PM   #11
ellisnc
Scooby Specialist
 
Member#: 4229
Join Date: Feb 2001
Location: Dublin, OH, USA
Vehicle:
2003 S2000
Did someone say track day

Default

I have 235/40 A032R on Advan RC2 rims with 8.5 width

no rubbing (even at full steering lock) and the car is pretty low with more than 2.5 degrees of camber in front.
ellisnc is offline   Reply With Quote
Old 04-09-2003, 05:16 PM   #12
Cosworth
Scooby Specialist
 
Member#: 3887
Join Date: Jan 2001
Chapter/Region: Tri-State
Location: Middletown, NJ
Vehicle:
08 Taco, 98 M3/4/5
'00 RC51, '08 KTM

Default

ellisnc, whats the offset on those? I wonder if high negative camber values are critical for fitment. Have you ever run any less camber with those tires/wheels? Tirerack claims that your tread width in your exact wheel width is 8.9". That is some meaty tire!
Cosworth is offline   Reply With Quote
Old 04-09-2003, 05:26 PM   #13
driggity
Scooby Specialist
 
Member#: 7453
Join Date: Jun 2001
Chapter/Region: TXIC
Location: Grapevine, TX
Vehicle:
2005 Legacy GT Wagon
2006 LJ Rubicon

Default

Quote:
Originally posted by omahasubaru
215/45-17 is a tad small (I'm running this size on my SDR's)
I agree with this completely. I have 215/45 17s RE950s on my battles and they definitely look too small. I've been thinking about putting real summer tires on and would love to try 235/40s but I have serious doubts as to whether or not they'd fit the wagon. I am running STi takeoffs so the car is barely lowered (if at all) but thats a lot of tire to fit under there. I'm thinking it might be worth trying with the T1-S as its not as wide as some of the tires out there (and is lighter too).

edit: Hmm, I wonder if Toyo's 500 Mile Trial Offer satisfaction guarantee thing would allow me to try 235/40s and swap for 225/45s if they didn't work out.

Last edited by driggity; 04-09-2003 at 05:32 PM.
driggity is offline   Reply With Quote
Old 04-09-2003, 05:29 PM   #14
JCampbell
Scooby Specialist
 
Member#: 25159
Join Date: Sep 2002
Chapter/Region: MWSOC
Location: Omaha
Vehicle:
- BrAkes stop you
BrEAks make you broken

Default

Quote:
Originally posted by Cosworth
...not all 235's are created equal...Generally speaking, It seems that the more "hardcore" or aggressive a tire is (max performance), the more tread width it will be packing for its size.
Good point Cosworth, since it is mostly the shoulder design/shape that determines the breakaway characteristics the more aggressive tires have sharp radiused shoulders, tires that lean toward the touring crowd have softer radiused shoulders and truck/off road tires have square shoulders to get the widest footprint and more bite on slopes, generally trucks aren't pushing the cornering envelope so breakaway isn't really an issue.
JCampbell is offline   Reply With Quote
Old 04-10-2003, 10:18 AM   #15
OedipusWRX
Scooby Newbie
 
Member#: 19531
Join Date: Jun 2002
Location: Ballard
Vehicle:
2006 Forester XT
Garnet Red

Default

Driggity,

I just mounted 235/40/17 Kumho Ecsta V700's on Rota Subzero's yesterday (9 1/8" measured actual section width). Put them on my WAGON last night and I had NO RUBBING during my one quick test drive. I am running STI struts and springs, stock front swaybar (for now) and Cusco rear swaybar set on 24mm. I also have my rear fenders rolled, but I don't think it was necessary.

These are my autox/track setup, so I will never be running them with a load in the car. That reduces the chance of rubbing obviously. I have an autox this weekend and that will be the real test to see if there is any rubbing. I can say that it looks like I have about a half inch of clearance on the struts. So far so good. POWER TO THE WAGONS!
OedipusWRX is offline   Reply With Quote
Old 04-10-2003, 12:17 PM   #16
ChrisW
Scooby Specialist
 
Member#: 4181
Join Date: Feb 2001
Location: keeping santa cruz weird
Vehicle:
2003 Lancer Evo 8
It's Blue, ok?

Default

I run a michien pilot sport 235/40/17 on my WRX sedan. I have DMS 50's installed and I have no rubbing problems.

I mounted the tires on my rota subzeros 17x7.5 +48mm.

OedipusWRX, I kind of suspected that the 235/40/17 would fit on a wagon. Couldn't find a volunteer, but glad to hear it works.
ChrisW is offline   Reply With Quote
Old 04-10-2003, 01:17 PM   #17
driggity
Scooby Specialist
 
Member#: 7453
Join Date: Jun 2001
Chapter/Region: TXIC
Location: Grapevine, TX
Vehicle:
2005 Legacy GT Wagon
2006 LJ Rubicon

Default

Brooke, thats good to hear. I may have to look into it. Did you get your fenders rolled somewhere out here and if so where? Thanks a lot.
driggity is offline   Reply With Quote
Old 04-10-2003, 01:36 PM   #18
OedipusWRX
Scooby Newbie
 
Member#: 19531
Join Date: Jun 2002
Location: Ballard
Vehicle:
2006 Forester XT
Garnet Red

Default

I rolled my own Not a perfect job, but not too bad. I'll have to see how the paint holds up over time now.
OedipusWRX is offline   Reply With Quote
Old 04-10-2003, 08:22 PM   #19
ellisnc
Scooby Specialist
 
Member#: 4229
Join Date: Feb 2001
Location: Dublin, OH, USA
Vehicle:
2003 S2000
Did someone say track day

Default

they're +45 offset


nope never run 1 degree negative or something like that.

yep they're some big meats... goes like stink around corners at the track too
ellisnc is offline   Reply With Quote
Old 04-11-2003, 01:07 AM   #20
tifosi77
Guest
 
Member#: 14110
Join Date: Jan 2002
Location: Hollywood where girls have fake boobies
Vehicle:
2002 2002 WRX
Swirly Black

Default

I know that you guys are interested in 23545/17 tires but let me tell you that my 235/40/18 are horrible I have them on 18x8.5 44offset I am switching to 245/40/18 as soon as these are done. I have Yoko AVS es-100 because I liked the tire on my 17" so when i upgraded I thought they would be good but I do not have enough tire.
tifosi77 is offline   Reply With Quote
Old 04-11-2003, 05:51 AM   #21
Avedis
Scooby Specialist
 
Member#: 8171
Join Date: Jul 2001
Chapter/Region: NWIC
Location: Mountlake Terrace
Vehicle:
2005 WRX STi
Blue / Gold

Default

Another NWIC'er interested in the post-AutoX rub/no rub results on your wagon. I'm looking to get STi wagon suspension soon (hopefully) and would love to fit some 235/40r17 rubber on there if it fits w/o rubbing (or even better, no rubbing or rolling).

edit: Was considering SZ50 EP tires until I noticed I'd have to get 'em in 215/45r17. Looks like my other choice, the T1-S, is pretty popular though.

--jeff

Last edited by Avedis; 04-11-2003 at 06:23 AM.
Avedis is offline   Reply With Quote
Old 04-11-2003, 09:16 AM   #22
Subdued
Scooby Specialist
 
Member#: 15904
Join Date: Mar 2002
Location: WA
Vehicle:
05 Impreza
09 Tribeca

Default

Quote:
Originally posted by omahasubaru
You could get away with 245/40's if you wanted too, but you'd have to roll your fenders (in the rear) & might have mild strut issues in the rear. 245/40-17 is closer to stock rolling diameter too!
With DMS struts and 17x7.5 ET48 wheels you should not have to worry about any fender mods even at lowered ride height.

A Happy 245/40/17 Kumho MX Owner
Subdued is offline   Reply With Quote
Old 04-11-2003, 12:55 PM   #23
JCampbell
Scooby Specialist
 
Member#: 25159
Join Date: Sep 2002
Chapter/Region: MWSOC
Location: Omaha
Vehicle:
- BrAkes stop you
BrEAks make you broken

Thumbs up

Quote:
Originally posted by ChrisW
I run a michien pilot sport 235/40/17 on my WRX sedan. I have DMS 50's installed and I have no rubbing problems.

I mounted the tires on my rota subzeros 17x7.5 +48mm.

...
THAT is cool! You wouldn't happen to have pix of that would you!?
Anyone else running the big 245/40's?

Thanks Chris,
John
JCampbell is offline   Reply With Quote
Old 04-15-2003, 04:55 PM   #24
OedipusWRX
Scooby Newbie
 
Member#: 19531
Join Date: Jun 2002
Location: Ballard
Vehicle:
2006 Forester XT
Garnet Red

Default Wagon + 235's + autox = NO RUBBING

Well I ran the autoX on Sunday with the new wheels & tires and had a great time. My run group was the dryest of the day, so I was able to explore the limits of the new tires' adhesion. R compounds are NIIICCCEEE. Now, to answer the question on everyone's mind, I HAD ZERO RUBBING. I now wish I hadn't rolled my rear fenders in preperation, because I think this setup would have cleared without it. I would at least be curious to know. I'll need them rolled when I go for a lower ride hight though. I'll post an update when I do.

So, to sum up 235/40/17's on 17 x 7.5 +48 wheels will work on a WRX wagon with STI struts and springs. I am also running a Cusco rear swaybar set on 24mm, but I think the STI rear sway would work in this setup as well (without rubbing that is). I like the way the car rotates with the larger rear swaybar.

Any questions?
OedipusWRX is offline   Reply With Quote
Old 04-15-2003, 05:53 PM   #25
driggity
Scooby Specialist
 
Member#: 7453
Join Date: Jun 2001
Chapter/Region: TXIC
Location: Grapevine, TX
Vehicle:
2005 Legacy GT Wagon
2006 LJ Rubicon

Default

No questions, just thanks for the update and a comment of my own. I did some research and it looks like the diameter on the v700s is .2 to .3 inches less than that of most street tires which could be one reason you have so much clearance. Of course they probably have a squarer shoulder and greater tread width than most street tires so some of that will be canceled out. Its kind of interesting to see the differences is measurements of tires that are supposedly the same size.
driggity is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
235-40-17 or 235-45-17 pmatty Tire & Wheel 9 05-05-2008 10:47 PM
235/45/17 vs 235/40/17 OneManArmy Tire & Wheel 11 12-07-2006 09:49 PM
235/40/17 vs. 235/40/18 purduephigam Tire & Wheel 52 12-05-2006 10:51 PM
235/40/17 or 235/45/17 jblaine Tire & Wheel 6 05-24-2006 08:42 AM
235/45/17 on WRX or 235/40/17 neuspeed Tire & Wheel 3 02-12-2005 11:56 AM


All times are GMT -4. The time now is 06:47 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.