evil00017

Your right I just realized that today. I thought it was a 20x10 +29

whazzzzuup

iTrader: (11)

At 20x10 +29 compared to his specs, his wheel will still protrude 6mm more than yours. That could be the difference between fitting properly or rubbing. However, a smaller tire will fix his problems without any more bodywork.

OP, a 265 is a very minor stretch on those wheels. With the 285, the constant rubbing will damage the outer sidewall and prematurely deem the tire unusable. It may also cause damage to the fender. Good luck with finding something that works for you.

Phamboogie

iTrader: (3)

Since we are on the topic of wheel fitment, how would a 20 x 10.5 +18 wheel fit in the back with just a shaved fender and 255/30-20 tires?

MrExecutiv

iTrader: (2)

you'll probably need a slight negative camber to avoid rubbing.

Phamboogie

iTrader: (3)

I currently have coilovers on the car so I would assume the camber would dial in as I lower it unless it needs to be tweaked by an alignment specialist. Thanks for answering my question, btw.

vietdeluxx

iTrader: (2)

Glad you got it to work.. you've been stressing for a while..

jacksonvp

Is anyone here running a 275/35/19?

I really want to run the Yokohama S-Drive's but they are only available in 35 series.


A 275/35/19 will be mathematically closer to the OE diameter compared to a 30 series. However we all know manufactures have a certain level of slop.

This will be on a 10.5 inch wheel.

GS FONZy

iTrader: (6)

What math are you using

OE 16"= 25.7"
OE 17"= 25.4"

275/35/19 = 26.5"

whazzzzuup

iTrader: (11)

A 275/30/19 is 25.5" in diameter; which is between the stock 16 and 17" tire diameters.

jacksonvp

I don't really have the desire to write it all down on paper, so we have to assume the calculations to be accurate to some degree.

I'm running them through the Miata.net calculator
http://www.miata.net/garage/tirecalc.html

Using the OE Size found on
http://www.lexus.com/contact/pdf/2000/2000GSspecs.pdf

A GS300 shows a 215/60/16 as the OE size

215/60/16=~26.2" Diameter

275/30/19=~25.5" Diameter
275/35/19=~26.6" Diameter

(These of course are relative to the accuracy of the specific calculator, and subjective to the tire manufactures measurable differences)

Using the Team MFactory Gear Ratio Calculator
http://teammfactory.com/gearcalculator.php

Assuming the Lexus Press Release gear ratio to be correct
Gear Ratios:
1st 3.357
2nd 2.180
3rd 1.424
4th 1.000
5th 0.753
FD 3.916

The power band of each gear will only be upset no more than ~1 MPH, whereas according to the sources listed, a 30 series should have slightly more "slop" (If the speed limiter were removed, the top speed would be lowered 5 MPH with a 275/30/19. Albeit some may argue the 30 series will have shorter "quicker" gears).



I am certain you are determining your numbers off a 225/55/16 which is factory for a GS400, but the GS400 has the 3.266 Final Drive. So I guess we have to concede that we are both right? :P

-Jackson

whazzzzuup

iTrader: (11)

Yes, you are correct. I did not know that the stock tire size for the GS300 is a 215/60/16! A 60 series must ride nicely!

GS FONZy

iTrader: (6)

That's weird, OE 17's use the same size tire, but OE 16's use a different size tire between the 300 & 4xx

Neo

iTrader: (3)

Those are early GS300 OEM sizes. The later 16s had 225/55 which made the diameter 25.7", which is closer to the diameter of the 17s (235/45 -> 25.3").