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Tire & Wheel Forum sponsored by The Tire Rack |
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08-03-2019, 12:24 PM | #8226 | ||||||
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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On another car, wheel to tierod end clearance was barely 0.030". Norm
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08-04-2019, 03:51 AM | #8227 |
Scooby Newbie
Member#: 500326
Join Date: Apr 2019
Chapter/Region:
International
Location: Australia
Vehicle:2015 WRX Premium 6MT Stage 2 |
Derailing this slightly, I'm looking at getting some Enkei RPF-1's for my daily-driven 2015 WRX (original, I know but I really like how the shape of the RPF-1 cross section accentuates a meaty fitment), but can't decide between 18x9.5 +38 or 18x9 +35, running 265/35s.
I'm aware that 265 is on the limit of how wide one might normally go with a 9" wheel, but I'm after a functional, meaty fitment. It's quite common for me to go ragging the car on some mountain/backroads for a bit of fun, but I don't have any intention of ever taking the car to the track. I know both of those widths/offsets physically fit the WRX, but my question is more along the lines of which one would be the more logical choice in terms of: - The look of the fitment - would 265's on a 9" be "too" meaty (I don't even know if it's possible to be too meaty)? - The weight saved by going for a 9" - The handling - would 265's on a 9.5" perform better or worse than a 9"? - The feel - would 265's on a 9.5" tramline less or more than a 9"? Also, being a big newbie to aftermarket wheels and tyres, will I need to purchase aftermarket valve stems and/or different lug nuts? I know I need hub-centric rings... Thanks in advance Last edited by rst.ack; 08-04-2019 at 04:00 AM. |
08-04-2019, 06:45 PM | #8228 | |
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Member#: 450808
Join Date: Jul 2016
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SCIC
Location: Anaheim
Vehicle:2017 WRX Premium WR Blue Pearl |
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I will say that the steering does feel quite a bit heavier over stock, which was to be expected. I also have a tiny bit of poke. Some stanceb0is might say it's a "perfect" fitment but in my opinion, it sticks out just a tiny bit too much considering my ride height is only about a 1" drop. If I was lower and more cambered it would look okay. Otherwise a +38 or even a +40 would look better at the height I'm at. If I were to do it all over again I'd go with a 9 wide rather than 9.5 to still retain some of the steering and turn-in sharpness. The issue is that 9.5 seems to be a much more common width than 9, so there aren't as many options in 9 wide. |
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08-05-2019, 08:55 AM | #8229 | |||||
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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FWIW, 9.5" is the "measuring width" for 265/35's, so it's by no means a 'stretched' fitment where you might expect any tramlining to be more evident. Quote:
Stay away from aluminum lug nuts, no matter how pretty they might look. Norm |
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08-05-2019, 11:47 PM | #8230 | |
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Join Date: Sep 2014
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BAIC
Location: NorCal
Vehicle:2018 STi WRB |
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Cheers |
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08-06-2019, 07:47 AM | #8231 | ||||||
Scooby Newbie
Member#: 500326
Join Date: Apr 2019
Chapter/Region:
International
Location: Australia
Vehicle:2015 WRX Premium 6MT Stage 2 |
Thanks for the info guys -- couple of questions if you can bear with me.
I could well be overthinking this given they would be going on a daily, but I figured I might as well do my homework if I'm spending close to $3k. Quote:
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If my maths is correct, 235/45r17 (stock) have an overall diameter of ~643.3mm ((235*0.45)*2+457.2 where 431.8=17 inches) and 265/35r18 have an overall diameter of ~642.7mm ((265*0.35)*2+457.2 where 457.2=18 inches), whereas 255/35r18 have an overall diameter ~10mm less, sitting at ~635.7mm ((255*0.35)*2+457.2 where 457.2=18 inches). This is all assuming the mounted tyre doesn't change diameter compared to when it's unmounted. |
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08-06-2019, 10:46 AM | #8232 |
Scooby Newbie
Member#: 501522
Join Date: May 2019
Location: Front Range, Colorado
Vehicle:2019 WRX STI Pearl White |
Check out https://tiresize.com/calculator/ to compare different tire sizes. 265/35 is a bit small. 255/40 is closer to stock.
The vendor where you buy the wheels will probably recommend lug nuts. I have seen You Tubes on +38 being the "perfect" fit where "perfect" means flush with the fenders. However I have seen posts on this forum from people who were surprised at how +38 actually fit when they got them. Personally if "perfect" mean flush look and that's what you are going for I would go with +45. I think you will find that flush enough. If "perfect" means keeping OEM handling stick with +50 or above. Going below +45 might require rolling the fenders. Fit is going to vary depending on the actual wheel and the actual tire selected. Tire and wheels are a bit like shoes. One brand size 10 is a 10.5 in another brand. |
08-06-2019, 01:38 PM | #8233 | |
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:
As for something a little more concrete, I actually have some datalogged comparative data where the only differences in car setup were the wheels & tires. Same stretch of road, similar weather conditions, same make and model tires (MPSS), with the same tread widths (10.2"). One set was mounted on "measuring width" wheels (9.5"), and the other was mounted on "max-recommended width" wheels (11"). There was a small diameter difference, but only about 0.4" (0.2" on sidewall height). The max-width setup turned in a little better, and had a noticeably more stuck-down "feel" at a little over 0.9g than the measuring-width setup had at a little over 0.8g. The "measuring width" setup wasn't bad, just that it felt a little "soft" in comparison to the wider wheel arrangement. The max-width setup has datalogged beyond 1.3g once fully warmed up in road course track driving. Norm Last edited by Norm Peterson; 08-06-2019 at 01:45 PM. |
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08-06-2019, 02:23 PM | #8234 |
Scooby Newbie
Member#: 458914
Join Date: Nov 2016
Chapter/Region:
SCIC
Location: SoCal
Vehicle:2017 WRX Premium WRB |
Moved up from 255 to 265.
18x9.5 +35 265/35/18 Falken RT615K+ -2 camber front, -2.5 camber rear Rear fenders shaved Front fenders stock Very slight rubbing in the fronts on big dips Very slight rubbing in rear with 2+ passengers and big dips Compressed |
08-06-2019, 03:34 PM | #8235 | |
Scooby Newbie
Member#: 501522
Join Date: May 2019
Location: Front Range, Colorado
Vehicle:2019 WRX STI Pearl White |
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With higher than recommended camber you are still getting some rubbing with the rear fenders shaved. |
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08-06-2019, 05:19 PM | #8236 | |
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:
One thing I should have mentioned in the earlier post is that there can be considerable differences in ride quality and handling crispness/turn-in response among tires of the same nominal size. Even when the tires are claimed to be within the same general performance category (i.e. performance all-season). Some years ago, Falken brought out their Ziex ZE-512 tire model, and to say it was a "soft-responding tire" and "disappointing" from a cornering/handling point of view would be putting it mildly. Bridgestone's RE-92 (not a great tire in other respects) was far better in the corners. Norm |
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08-06-2019, 07:12 PM | #8237 | |
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Member#: 458914
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For anyone wondering, I experienced zero rubbing with 255s. |
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08-07-2019, 03:31 AM | #8238 | ||||
Scooby Newbie
Member#: 500326
Join Date: Apr 2019
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International
Location: Australia
Vehicle:2015 WRX Premium 6MT Stage 2 |
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That calculator you linked to confirms my statement that 265/35r18 is closest to the diameter of the stock 235/45r17: Additionally, it has been said time and time again in this very thread that 18x9.5 +38 fits without fender modifications -- no mention of flush fitment, merely that they fit the car without mods. That is of course dependent on tyre size, but from memory the majority of those posts quoted tyre sizes around the 255/40 - 265/35 ballpark. The same assertion has been made when using coilovers, which, without increasing camber, would exacerbate rubbing issues if that wheel spec didn't fit properly without mods. Quote:
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18x9 +35 is a more conservative offset as far as wheel poke is concerned. Remember offset means nothing without width, and vice versa. Quote:
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08-07-2019, 10:56 AM | #8239 | |
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:
Ends up with both conventional (for the time) appearance reasons and for the Tire & Rim Association rim width ranges for 70 and 60 series tires forcing sidewalls to be tall and visibly "bulge-y". This association seems to have stuck, perhaps past its "best sold by" date. On appearances, once a car starts picking up stereotypical drag race car or traditional muscle car visual cues, the car's got to be powerful and fast, right? And wheels do tend to be the things that first stand out from and hint at the rest . . . [/sarcasm] I do give the serious drag racers a partial pass in that the slightly softer "meaty" fitment would cushion the shock of sudden clutch engagement in dragstrip-style starts a little. Though with AWD, this is perhaps of less value than with 2WD (either end). Norm Last edited by Norm Peterson; 08-07-2019 at 11:01 AM. |
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08-07-2019, 11:52 AM | #8240 |
Scooby Newbie
Member#: 501522
Join Date: May 2019
Location: Front Range, Colorado
Vehicle:2019 WRX STI Pearl White |
My opinions are based on my experience in the alignment industry.
I worked with BMW designing a machine to measure ride height at their Dingolfing assembly plant. For final sign off of our machine we had to read ride height on a BMW 3 under different conditions and match their charts. We read it empty, with a driver, with a driver and a passenger, with 3 total passengers, with 4 and with 4 and a load in the trunk. The difference in ride height from empty to full load was over 15mm. Variation from one car to another was about 2mm. Just because one person does not have a rubbing issue they care about does not mean that you will not have a rubbing issue. I went to Les Schwabb to see if they had wheels that were close to +55. They did not. The salesman told me, if you put wheels on the car that are +40 it WILL change the driving characteristics of the car. If you don't like the change, I don't care, because it was your choice to put aftermarket wheels on your car. If you want to go with a wide stance and change the driving characteristics of your car, and you want to risk serious rubbing when you take your wife, friends and a full load in your trunk, that is your problem, not mine. Definitely do what you want. Whatever you choose, it is your choice. If you don't like the results, it is your problem and your $3000 spent. Choose wisely. I am done with this thread. |
08-07-2019, 12:18 PM | #8241 |
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Location: Socal
Vehicle:2016 WRX ISM |
^^
not sure what youre talking about, you're all talk with no first hand experience on putting wheels on the specific va chassis, 20 years experience blah blah. Also not sure why youre in this thread, are you having trouble fitting 245 on your 8.5 +55 wheels or what? old setup, 265/35 ad, 18x9 35 ze40, ohlins and stance lca, -2.5f and -2r, untouched fenders, no rubbing. Last edited by kaeknows; 08-07-2019 at 12:32 PM. |
08-07-2019, 12:41 PM | #8242 | |
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Location: Phoenix, AZ
Vehicle:2018 Subaru ISM |
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Tuffff |
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08-07-2019, 12:45 PM | #8243 |
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Member#: 357191
Join Date: May 2013
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Location: Socal
Vehicle:2016 WRX ISM |
Last edited by kaeknows; 08-07-2019 at 12:50 PM. |
08-08-2019, 04:41 AM | #8244 |
Scooby Newbie
Member#: 500326
Join Date: Apr 2019
Chapter/Region:
International
Location: Australia
Vehicle:2015 WRX Premium 6MT Stage 2 |
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08-10-2019, 12:11 AM | #8245 | |
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Join Date: Jul 2010
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If i had a chance to do it all over again, i would keep these. Last edited by rymaggi; 08-10-2019 at 11:47 PM. |
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08-10-2019, 05:46 AM | #8246 | |
Scooby Newbie
Member#: 500326
Join Date: Apr 2019
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Location: Australia
Vehicle:2015 WRX Premium 6MT Stage 2 |
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08-10-2019, 02:00 PM | #8247 |
Scooby Specialist
Member#: 450808
Join Date: Jul 2016
Chapter/Region:
SCIC
Location: Anaheim
Vehicle:2017 WRX Premium WR Blue Pearl |
Judging from his posts, Norm seems to know more than I do regarding the technical aspects of this stuff, as I'm just some schmuck who only drives his car to and from work. I would venture to say that he is probably right as far as the turn-in response being better. The steering does definitely feel heavier though which is probably the more appropriate word to use and also how Norm described it.
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08-10-2019, 11:47 PM | #8248 |
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08-12-2019, 08:16 AM | #8249 |
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Location: Chicago, IL (NW 'burbs)
Vehicle:2015 WRX Premium WRB |
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08-14-2019, 10:42 PM | #8250 |
Scooby Newbie
Member#: 482173
Join Date: Feb 2018
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Titan 7 T-S5's 18x9.5 +40
Firestone Firehawk Indy 500's 255/35r18 Fortune Auto 500 coilovers and Whiteline LCA's Car not aligned yet, but there's no rubbing so far. Tires are stretched more than I'd like but 265's will require fender work. Last edited by SquatchHunter; 08-15-2019 at 12:04 AM. Reason: Photos not showing up |
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