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Tire & Wheel Forum sponsored by The Tire Rack |
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04-14-2020, 12:29 PM | #8451 | |
Scooby Newbie
Member#: 357191
Join Date: May 2013
Chapter/Region:
SCIC
Location: Socal
Vehicle:2016 WRX ISM |
Quote:
advan tc3 18x10 +35mm, yokohama advan ad08 265/35, front fitment is 18x10 +25 due to spacers.
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Last edited by kaeknows; 04-14-2020 at 05:36 PM. |
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04-15-2020, 07:44 AM | #8452 | |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
Quote:
It's best to follow T&RA guidelines, and FWIW going outside their wheel width range on the narrow end generally results in somewhat more sidewall heating as you drive on them. Steering precision would also suffer a bit, which your car's VDC might not be too happy about. 40 profile tires aren't supposed to have much visible 'bulge' or sidewall curvature to their appearance. Norm |
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04-15-2020, 12:25 PM | #8453 | |
Scooby Newbie
Member#: 487500
Join Date: Jun 2018
Location: Catonsville, MD
Vehicle:2018 WRX |
Quote:
On stock suspension I dont think you should have any issues. Lowered will be another story... |
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04-15-2020, 07:08 PM | #8454 | |
Scooby Newbie
Member#: 107279
Join Date: Feb 2006
Chapter/Region:
South East
Vehicle:06 vf39 wrx black |
Quote:
Thanks for the explanation, I just wanted to avoid the stretched look. |
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04-17-2020, 09:15 PM | #8455 |
Scooby Newbie
Member#: 513835
Join Date: Apr 2020
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Looooong time lurker...first post! I've read quite a bit of this huge thread for weeks, but could really use some insight.
I have a 2015 WRX that came with 235/45/17, and after 5 years, it is time to change. Long overdue. My first thought is to go to 18 inch from the OEM 17 inch. This car certainly rides a bit rough on 17 inch wheels and does not have the inverted strut change that came in certain trim levels with OEM 18 inch after the WRX 2015 year. Despite this, it should be fine to make this change to 18s without too much degradation in ride quality, as I don't really mind and kind of like the suspension setup...just don't want it to be really bad to daily. Second, I plan on keeping the car stock ride height. I've had a super low BRZ before and it is not something I will do with the roads where I live. Additionally, my driveway is as steep as possible and requires a perfect angle to not scrape. And even then it does so super super slightly, however it is seems to be the mudflaps, but will diagnose this further before pulling the trigger on wheels, yet I doubt it is rubbing tires/liners on OEM 17. Still, this is an important consideration for me. (Taking the wrong angle bottoms out and scrapes what I believe to be the aluminum skid plate in the front and flashes a light on the dash....) Third, tire size. I have looked at going to the OEM 18 at 245/40/18, which at the moment seems to be the best choice. Initially, I was thinking about going with a wider tire since I am buying rims anyways. Something like 255/40/18 or 265/35/18. I've done the tire calculations for size, but it is quite hard to figure out if these will rub at all (remember the driveway) at stock height depending on the offset. Also, I really don't want to sacrifice the drivability or great handling of this car. It is stock minus some cosmetics and a muffler delete, so a super wide tire other than looking nice, could sacrifice handling etc from what I have read here, however that seems mostly related to offset. While a lot of people like the 35ish offset and it does look great, I plan on sticking closer to stock like 42 or 45 to find the balance of looks with performance. I just don't know what tire size to get will all of these considerations in mind....help? I will get Michelin Pilot Sport A/S 3+ and like the style of 6 spoke rims like Rota Concave Grids or AVID1 AV06 if they fit the selected tire. Possibly in white to match the white paint on the car. Will look pretty great with some of the gloss black vinyl wrapping/accents and red S207 pinstripe. (If anyone has recommendations on rim brands here, send me a DM.) Thanks! |
04-18-2020, 08:33 AM | #8456 |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
I think that 255/40's on 18x9 with +45 offset is your best easy choice. You get just a little more ride height from 255/40 being about 0.3" taller than the OE 245/40 (~0.15" more ground clearance), and you're not moving the wheel laterally enough to cause any problems. Here's a plot comparing 255/40-18 on 9", +45 against Subaru's OE 245/40-18 on 8.5", +55. The tire's outer sidewall at sidewall mid-height will be about 15mm closer to flush than Subaru's OE (should be clearly noticeable).
I could re-plot this with 9.5" wide wheels and whatever offset. 265/35 tires would be 0.4" shorter than Subaru's OE 18" setup (~0.2" less ground clearance). Norm |
04-18-2020, 04:16 PM | #8457 | |
Scooby Newbie
Member#: 513835
Join Date: Apr 2020
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Quote:
Compared to the 235/45/17, the 255/40/18 9 +45 it looks like a nice choice. (Other than the Michelin Pilot Sport A/S 3+ only comes with 95Y at that size instead of OEM 97Y, which I guess could be negligible at the weight numbers, not sure how I feel about that.) When comparing the 235/45/17 to 265/35/18, I saw that the diameter/circumference is identical while gaining 1.1 inchs in width and losing 0.5 inches in sidewall. That would be what, a 18x9.5 inch rim with a 42 to 45 offset? But, I just can't find people saying how that drives stock. |
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04-19-2020, 08:16 AM | #8458 |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
You have to be a little careful when comparing load index numbers. The A/S 3+ is an SL tire, and the SL table is different from the XL table I'm getting for the OE. The quick and dirty conversion is that an SL tire rates like an XL tire four numbers higher. Until inflation pressures exceed 35 psi, where the XL continues to gain rated load capacity (and the SL tire cannot take credit for inflation past that point).
IOW, a 95SL tire is a match for a 99XL tire up to 35 psi, and I'm guessing that your door sticker calls for something like 33 front/32 rear. I would expect the 255/40 on 9" to handle just a little more 'crisply', slightly better initial response even in street driving. Section height is about 1/8" shorter than the 235/45-17 but you'd gain 1/2" of ground clearance from the wheel diameter difference. Yes, the 255/40-18 is a little taller and will fill up the wheel well a little more (and take a little out of the tire to fender gap at the top), but it won't be much different from Subaru's 18" option that I plotted up above. For your change, you're looking at something more like this Norm |
04-21-2020, 10:47 AM | #8459 | |
Scooby Newbie
Member#: 499784
Join Date: Mar 2019
Vehicle:2017 WRX Crystal White Pearl |
Quote:
These look great, I’m thinking of getting these in gloss black. Where did you get them from? |
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04-23-2020, 11:26 AM | #8460 |
Scooby Newbie
Member#: 513783
Join Date: Apr 2020
Vehicle:2019 WRX STi |
What specs? I like that look a lot. Good choice of wheel!
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04-23-2020, 04:28 PM | #8461 |
Scooby Newbie
Member#: 487500
Join Date: Jun 2018
Location: Catonsville, MD
Vehicle:2018 WRX |
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04-24-2020, 12:53 AM | #8462 |
Scooby Newbie
Member#: 492997
Join Date: Oct 2018
Chapter/Region:
SCIC
Vehicle:2018 WRX Limited black |
2018 WRX . Would 18x9.5 et 38 with 255/40 tires on swift springs fit without rolling or pulling fenders? Any input pls. Thank you
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04-24-2020, 03:06 PM | #8463 |
Scooby Newbie
Member#: 456813
Join Date: Oct 2016
Chapter/Region:
Tri-State
Location: North Jersey
Vehicle:2016 WRX MT LIMITED Dark Grey |
would their be much of a ride quality difference going from a 245/40 to a 255/35 on a 18x9+35 wheel?
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04-25-2020, 11:53 AM | #8464 | |
Scooby Newbie
Member#: 487500
Join Date: Jun 2018
Location: Catonsville, MD
Vehicle:2018 WRX |
Quote:
Personally I wouldnt do it. A 245 on a 9" wheel is fine. |
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04-26-2020, 07:43 AM | #8465 |
Scooby Specialist
Member#: 403893
Join Date: Oct 2014
Chapter/Region:
SCIC
Location: SoCal
Vehicle:2015 STi Limited WR Blue |
2015 WRX/STi Aftermarket wheel and tire fitment
Sorry, Wrong spot.
Last edited by skeeter281; 04-26-2020 at 08:58 AM. |
04-26-2020, 08:56 AM | #8466 | |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
Quote:
Norm |
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04-26-2020, 08:33 PM | #8467 |
Scooby Newbie
Member#: 460817
Join Date: Jan 2017
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bit a newb when it comes to this, just looking for some guidance...
Own a 2017 STI, looking at trying to improve the ride comfort a bit as these trash LA roads are finally taking a toll on my commute. I understand that downsizing rim and going with a taller tire can help alleviate my concern, but I am trying to figure out what I am supposed to go with. Ultimately, I would like to keep the same overall tire height to the OEM rim/tire combination. So should I be looking for a 17" rim and a tire size 245/45/17? Im interested in the Sparco Terras which would be 17x7.5 with a 245/45ZR17 Michellin (either summer or all season). Am I looking in the right direction? Any advice? |
04-26-2020, 11:57 PM | #8468 | |
Scooby Newbie
Member#: 487500
Join Date: Jun 2018
Location: Catonsville, MD
Vehicle:2018 WRX |
Quote:
Tire size sounds fine for the car but a 7.5" is a bit narrow. Might get a bit of tire bulge with that setup. Do they offer a wider option, stock wheel is 8.5" wide. |
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04-27-2020, 08:59 AM | #8469 |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
7.5" is do-able for 245/45, but it's a min-recommended fitment. 8" is measuring width, so 7.5" would be expected to ride just a little softer . . . and have slightly softer cornering response and steering precision as well.
Norm |
04-27-2020, 10:36 AM | #8470 | |
Scooby Newbie
Member#: 488146
Join Date: Jul 2018
Chapter/Region:
SWIC
Location: Arizona
Vehicle:2015 WRX Red |
Quote:
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04-30-2020, 07:55 PM | #8471 | |
Scooby Newbie
Member#: 460817
Join Date: Jan 2017
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Quote:
Im guessing I would have to go with 235 if i were to go with 7.5? or probably look for an 8.5 rim. |
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05-01-2020, 08:04 AM | #8472 | |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
Technically, they do. Just not by enough to tell just by looking at them.
Quote:
Either size is enough bigger than 245/35-19 that you could reduce the inflation pressure a little without compromising any rated load considerations (this is a legitimate thing to do, and I have the tables to work out how much this inflation pressure change would amount to). Norm Last edited by Norm Peterson; 05-07-2020 at 07:21 AM. |
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05-03-2020, 10:56 PM | #8473 | |
Scooby Newbie
Member#: 460817
Join Date: Jan 2017
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Quote:
thanks! |
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05-06-2020, 11:37 PM | #8474 |
Scooby Newbie
Member#: 366122
Join Date: Aug 2013
Chapter/Region:
E. Canada
Location: GTA, Ontario
Vehicle:2015 STi DGM |
18x9.5 +38 w/ 275/35/18s
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05-07-2020, 07:24 AM | #8475 |
Scooby Specialist
Member#: 498642
Join Date: Mar 2019
Chapter/Region:
Tri-State
Location: our wrx IS the family sedan
Vehicle:'19 WRX Ltd 6M dgm '08 Mustang GT (the toy) |
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