Widest tire to fit on an 18x9.5 Wheel?!!! ** - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SkAsphalt · 03-07-2013, 01:03 PM

Please note, speedo auto calibrates with sensors

Pin Flare · 03-08-2013, 01:51 AM

Quote:

Originally Posted by SkAsphalt

Please note, speedo auto calibrates with sensors

How long does that take? I just put 275/35R18 on back of my FRS today and after 150 miles driving home I was still reading 3mph under actual speed.

OP I got 275/35R18 Toyo Proxes T1S today on 18x9.5 +40 wheels out back at stock ride height and I got no rubbing all the way home and over some pretty major bumps too.

ScionFR-S · 03-08-2013, 09:54 AM

Quote:

Originally Posted by Pin Flare

How long does that take? I just put 275/35R18 on back of my FRS today and after 150 miles driving home I was still reading 3mph under actual speed.

OP I got 275/35R18 Toyo Proxes T1S today on 18x9.5 +40 wheels out back at stock ride height and I got no rubbing all the way home and over some pretty major bumps too.

Damn THis makes me wish i would have went with a 275 haha whatever a 265/35-18 is in the same ballpark ... i have a +38 offset so maybe i would be better off with my decision

SkAsphalt · 03-08-2013, 12:38 PM

Quote:

Originally Posted by Pin Flare

How long does that take? I just put 275/35R18 on back of my FRS today and after 150 miles driving home I was still reading 3mph under actual speed.

OP I got 275/35R18 Toyo Proxes T1S today on 18x9.5 +40 wheels out back at stock ride height and I got no rubbing all the way home and over some pretty major bumps too.

Mm I do not know to be honest, you retained all tire sensors when you switch over rims? Everyone on the board states that the speedo is calibrated by sensors and that people on the board who are tech's at toyota confirmed that. Cannot explain your circumstance.

Those tires are crazy wide btw haha.

GTB/ZR-1 · 03-08-2013, 12:48 PM

Not sure what the limit is, but I'm really glad you're not asking what the narrowest tire is that'll fit on that rim... Lol

Tansey86 · 03-08-2013, 01:32 PM

Quote:

Originally Posted by Pin Flare

How long does that take? I just put 275/35R18 on back of my FRS today and after 150 miles driving home I was still reading 3mph under actual speed.

OP I got 275/35R18 Toyo Proxes T1S today on 18x9.5 +40 wheels out back at stock ride height and I got no rubbing all the way home and over some pretty major bumps too.

Can I see this setup please?

Pin Flare · 03-08-2013, 02:22 PM

Quote:

Originally Posted by Tansey86

Can I see this setup please?

Yes you can as soon as I can get to a computer.

Tansey86 · 03-08-2013, 02:24 PM

Quote:

Originally Posted by Pin Flare

Yes you can as soon as I can get to a computer.

Thanks man!

Gixxersixxerman · 03-08-2013, 04:53 PM

Ill post them for you @Pin Flare

Gixxersixxerman · 03-08-2013, 04:55 PM

He is getting the car dropped today, had to take it to two different places.. But I'll post the day pictures and when the car is lowered..

Tansey86 · 03-08-2013, 10:17 PM

hows interior clearence? By that I mean wheel to the springs.

wparsons · 03-09-2013, 11:40 AM

Quote:

Originally Posted by SkAsphalt

Mm I do not know to be honest, you retained all tire sensors when you switch over rims? Everyone on the board states that the speedo is calibrated by sensors and that people on the board who are tech's at toyota confirmed that. Cannot explain your circumstance.

Those tires are crazy wide btw haha.

The speed is determined by the ABS (wheel speed) sensors so the speed isn't effected by the final drive ratio at all, but is 100% effected by the diameter of the tires. There is no auto calibration to adjust the speed if you go to taller or shorter tires, you would have to do it through tech stream. The wheel speed sensors are attached to the suspension and have nothing to do with the tire pressure sensors in the wheels.

Also keep in mind what the ECU might do if the diameter of the front and rear wheels is off by too much, it'll think one axle is constantly spinning. I don't know how much you would have to be off by for it to detect it, but it's a possibility.

As for the tire widths, a 255 RS3 is almost the exact same width as most 275's. If you want to see the actual width, look up the detailed tire specs (tirerack has it for most tires) and look at the tread width in inches.

As it's been said before, a 275 is hugely overkill, especially on stock power and just for daily driving. Adding too much width can make the balance worse, steering feel worse, and it makes the car tram line (follow grooves in the pavement) worse. IMO, 245's already look plenty wide on these cars (especially up front!). If you want 305's get a big v8 muscle car

AJ PwR · 03-09-2013, 04:05 PM

Quote:

Originally Posted by ScionFR-S

would a 275 width tire hit anything though like the springs? any one have any pics to share?

I guess it will hit the stock spring perche portion of the shock if the car is lowered. Better make sure before you go ahead !

I am running 255 on 9.5 +40 with -2.5 front camber, it's flush and no rubbing. With 275 with less camber, it will poke ! If you plan on running springs, you won't get much camber out from it so you gotta make sure you can live with it.

ScionFR-S · 03-09-2013, 04:43 PM

Quote:

Originally Posted by AJ PwR

I guess it will hit the stock spring perche portion of the shock if the car is lowered. Better make sure before you go ahead !

I am running 255 on 9.5 +40 with -2.5 front camber, it's flush and no rubbing. With 275 with less camber, it will poke ! If you plan on running springs, you won't get much camber out from it so you gotta make sure you can live with it.

ive decided on going with a 18x8.5 +38 235/40 front and 18x9.5 +38 with a 265/35 Rear

03-08-2013, 12:48 PM	#33
GTB/ZR-1 Senior Member Join Date: Oct 2012 Drives: '13 BRZ in WRB--let's mod!!! Location: Central, FL Posts: 1,224 Thanks: 317 Thanked 449 Times in 262 Posts Mentioned: 0 Post(s)	Not sure what the limit is, but I'm really glad you're not asking what the narrowest tire is that'll fit on that rim... Lol __________________ * ‘23 Corolla GR—AutoX/DE toy * '13 Toyobaru P&L Turbo WRB BRZ SCCA XS-A build starting. SOLD * '22 Z51 Vette--sold. * '09 Nissan GT-R--gone, but not forgotten... 10.63 @ 131+ on streeties. * '90 ZR-1 11.0 @ 130.2 & 11.2 @ 132.4 sprayed 120 shot.

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03-08-2013, 04:53 PM	#37
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03-08-2013, 10:17 PM	#39
Tansey86 Senior Member Join Date: Sep 2012 Drives: 2003 Subaru Outback Location: Long Island, NY Posts: 1,318 Thanks: 154 Thanked 529 Times in 300 Posts Mentioned: 3 Post(s)	hows interior clearence? By that I mean wheel to the springs.

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