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Old 04-13-2007, 10:10 AM   #1
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Official YARIS Wheel & Tire Guide

WHEEL BOLT PATTERN PCD = 4 x 100mm

CENTRE BORE = 54.1mm

OEM wheel sizes, offsets (ET), and tyre sizes (diameter in inches):

14x5, ET45, 175/65/14 = 23.0
15x5.5, ET45, 185/60/15 = 23.7
16x6, ET51, 195/50/16 = 23.7
17x6.5, ET51, 205/45/17 = 24.3
TRD Option 18x7.5, ET42, 215/35/18 = 23.9

With stock suspension, you may safely fit many tyres from 23.0 to 24.3, +/-3%.

__________________________________________________ _______

Recommended offsets (ET) and tyre widths (mm):

ET35+ = 175-185
ET38-ET40 = 175-195
ET42-ET45 = 195-205
ET45+ = up to 215

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Here is an excellent and easy to use wheel and tyre fitment guide:

http://www.rimsntires.com/specs.jsp

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Optional tyre sizes (diameter in inches):

*Commonly recommended replacement sizes

Fitment depends on wheel width, offset, and suspension mods.

175/65/14 = 23.0*
185/65/14 = 23.5*
195/65/14 = 24.0
195/60/14 = 23.2*
205/60/14 = 23.7*
215/60/14 = 24.2

175/65/15 = 24.0
185/60/15 = 23.7*
195/60/15 = 24.2*
195/55/15 = 23.4*
205/55/15 = 23.9*
195/50/15 = 22.7
205/50/15 = 23.1* (Most lowered applications)
215/50/15 = 23.5
225/50/15 = 23.9

195/50/16 = 23.7*
205/50/16 = 24.1*
215/50/16 = 24.5
195/55/16 = 24.4
205/45/16 = 23.2* (Most lowered applications)
225/45/16 = 23.9

205/45/17 = 24.3*
205/40/17 = 23.5* (Most lowered applications)
215/40/17 = 23.8

215/35/18 = 23.9*
225/35/18 = 24.2
205/40/18 = 24.4

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Staggered fitments:

1. Staggered offsets are common in Japan. These applications even out fitment front to rear and are purely for appearance. Tyre size generally remains constant front to rear. Staggered offsets preclude tyre rotation. Recommended maximum stagger is 10mm.

Example: FR, ET45//RR, ET38

Example: FR, ET42//RR, ET35

2. Staggered tyre widths are less common, especially on front wheel drive cars. These applications even out front to rear fitment. They are not recommended for the track, but as an appearance option they are safe under normal driving conditions. Staggered tyre widths preclude tyre rotation.

Example: FR 205/55/15//RR 225/50/15

Example: FR 205/50/16//RR 215/50/16

Example: FR 205/40/17//RR 215/40/17

3. Wheels spacers are another option to even out fitment front to rear. Maximum recommended rear spacer width is 10mm. Tyre rotation is still possible.

Example: FR, ET42//RR, ET42 with 5-10mm spacer
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Old 04-13-2007, 10:18 AM   #2
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Old 04-13-2007, 10:38 AM   #3
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Here's a cut & paste from an Excel spreadsheet I made up a while ago to help determine various tire sizes. Both models' sizes are included (as there is a 3.41% difference in diameter from the base to the RS model!). This doesn't take into account the ratio between wheel widths and tire widths.

Base Model with 175/65/14:
HTML Code:
	Width	Aspect	Wheel	Diameter	Circumference	Difference
	(mm)	(%)	(in)	(mm)	(in)	(mm)	(in)	(mm)	(in)	(%)
							
Orig.	175	65	14	583.10	22.957	1831.86	72.121	--	--	--
										
+1	185	55	15	584.50	23.012	1836.26	72.294	4.4	0.17	0.24%
	185	60	15	603.00	23.740	1894.38	74.582	62.5	2.46	3.41%
	195	55	15	595.50	23.445	1870.82	73.654	39.0	1.53	2.13%
	195	50	15	576.00	22.677	1809.56	71.242	-22.3	-0.88	-1.22%
	205	50	15	586.00	23.071	1840.97	72.479	9.1	0.36	0.50%
										
+2	195	45	16	581.90	22.909	1828.09	71.972	-3.8	-0.15	-0.21%
	195	50	16	601.40	23.677	1889.35	74.384	57.5	2.26	3.14%
	205	45	16	590.90	23.264	1856.37	73.085	24.5	0.96	1.34%
	205	40	16	570.40	22.457	1791.96	70.550	-39.9	-1.57	-2.18%
										
+3	205	35	17	575.30	22.650	1807.36	71.156	-24.5	-0.96	-1.34%
	215	30	17	560.80	22.079	1761.81	69.362	-70.1	-2.76	-3.82%
	215	35	17	582.30	22.925	1829.35	72.022	-2.5	-0.10	-0.14%
	225	35	18	614.70	24.201	1931.14	76.029	99.3	3.91	5.42%
	225	30	17	566.80	22.315	1780.65	70.105	-51.2	-2.02	-2.80%
RS Model with 185/60/15:
HTML Code:
	Width	Aspect	Wheel	Diameter	Circumference	Difference
	(mm)	(%)	(in)	(mm)	(in)	(mm)	(in)	(mm)	(in)	(%)
						
Orig.	185	60	15	603.00	23.740	1894.38	74.582	--	--	--
										
+1	195	50	16	601.40	23.677	1889.35	74.384	-5.0	-0.20	-0.27%
	195	55	16	620.90	24.445	1950.61	76.796	56.2	2.21	2.97%
	205	50	16	611.40	24.071	1920.77	75.621	26.4	1.04	1.39%
	205	45	16	590.90	23.264	1856.37	73.085	-38.0	-1.50	-2.01%
	215	45	16	599.90	23.618	1884.64	74.198	-9.7	-0.38	-0.51%
										
+2	205	40	17	595.80	23.457	1871.76	73.691	-22.6	-0.89	-1.19%
	205	45	17	616.30	24.264	1936.16	76.227	41.8	1.65	2.21%
	215	40	17	603.80	23.772	1896.89	74.681	2.5	0.10	0.13%
	215	35	17	582.30	22.925	1829.35	72.022	-65.0	-2.56	-3.43%
										
+3	205	35	18	600.70	23.650	1887.15	74.297	-7.2	-0.28	-0.38%
	215	30	18	586.20	23.079	1841.60	72.504	-52.8	-2.08	-2.79%
	215	35	18	607.70	23.925	1909.15	75.163	14.8	0.58	0.78%
	225	35	18	614.70	24.201	1931.14	76.029	36.8	1.45	1.94%
	225	30	18	592.20	23.315	1860.45	73.246	-33.9	-1.34	-1.79%

Wheel width to Tire width Ratios:
HTML Code:
Tire Width	Wheel Width in inches, and the wheel/tire ratio
mm	inches	5	5.5	6	6.5	7	7.5	8
175	6.890	72.57%	79.83%	87.09%	94.34%	--	--	--
185	7.283	68.65%	75.51%	82.38%	89.24%	96.11%	--	--
195	7.677	65.13%	71.64%	78.15%	84.67%	91.18%	97.69%	--
205	8.071	61.95%	68.15%	74.34%	80.54%	86.73%	92.93%	99.12%
215	8.465	59.07%	64.98%	70.88%	76.79%	82.70%	88.60%	94.51%
225	8.858	56.44%	62.09%	67.73%	73.38%	79.02%	84.67%	90.31%
235	9.252	54.04%	59.45%	64.85%	70.26%	75.66%	81.06%	86.47%
Hope this helps, and adds to the information already provided!

Z
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Last edited by Doc Zaius; 04-16-2007 at 08:17 PM. Reason: added a new table...
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Old 04-13-2007, 10:39 AM   #4
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Now this is one gangster-ass thread... an instant classic.
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Old 04-13-2007, 10:46 AM   #5
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The fact that there's such a huge difference in circumference between the base model and the RS model (more than 3%) has always made me wonder... like if they have different speedometer gearings...?! Weird, isn't it? And since the base model has smaller tires, it should mean it can accelerate faster than an RS can!
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Old 04-13-2007, 10:46 AM   #6
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can't imagine a yaris with 20' wheel
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Old 04-13-2007, 10:54 AM   #7
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[quote=Doc Zaius;74847]The fact that there's such a huge difference in circumference between the base model and the RS model (more than 3%) has always made me wonder... like if they have different speedometer gearings...?QUOTE]


The speedos are not gear driven. I really doubt the calibrations are different.
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Old 04-13-2007, 11:05 AM   #8
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Quote:
Originally Posted by Doc Zaius View Post
Here's a cut & paste from an Excel spreadsheet I made up a while ago to help determine various tire sizes. Both models' sizes are included (as there is a 3.41% difference in diameter from the base to the RS model!). This doesn't take into account the ratio between wheel widths and tire widths.

Hope this helps, and adds to the information already provided!

Z
you know some of those tire size you have in there do not yet exist... The tire sizes I have posted above are common and are easy to get ahold of for the common person, if a new tire size is made ANYONE PLEASE contact me so that I can edit the post to I can get the corrected information out to the people! But that is a nice spreadsheat ya got there Z
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Old 04-13-2007, 11:12 AM   #9
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Quote:
Originally Posted by Black Yaris View Post
you know some of those tire size you have in there do not yet exist...
You're right... I checked out 1010tires.com: The 30 series tires don't exist, and one of the 35 series tires don't... at least on that site. But ALL of the +1 and +2 sized combinations I listed (all of the 40 series tires and bigger) are there, which almost 99% of people would be considering anyhow (except spkrman & his huge 20"s!). So ya... for regular sizes, they exist.

I'll post a link so the people can download the spreadsheet if they want. I'll have to do it from home though b/c I'm firewalled at work!
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Last edited by Doc Zaius; 04-13-2007 at 12:42 PM. Reason: verifed info...
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Old 04-13-2007, 12:02 PM   #10
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Thumbs up

I love this, Heil the Tire Nazi!
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Old 04-13-2007, 12:45 PM   #11
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I love this, Heil the Tire Nazi!
funny thing is, Ich spreche Deutsch!
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Old 04-13-2007, 01:06 PM   #12
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Quote:
Originally Posted by Doc Zaius View Post
(as there is a 3.41% difference in diameter from the base to the RS model!)
Funny thing, may be related or not.. My current tires are 0.8% smaller (or larger, can't remember) than stock, according to the Toyota Thailand specifications. But there is about a 5% discrepancy between my speedo and the speed reportd by my GPS unit. i.e when the speedo says I am going 100km/h, the GPS says I am going 95. Now, as far as I understand the GPS should be as accurate as can be, seeing as it calculates speed based on the actual rate of movement of the vehicle, not a wheel sensor.

What do you guys make of this?
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Old 04-13-2007, 03:34 PM   #13
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Quote:
Originally Posted by eTiMaGo View Post
Funny thing, may be related or not.. My current tires are 0.8% smaller (or larger, can't remember) than stock, according to the Toyota Thailand specifications. But there is about a 5% discrepancy between my speedo and the speed reportd by my GPS unit. i.e when the speedo says I am going 100km/h, the GPS says I am going 95. Now, as far as I understand the GPS should be as accurate as can be, seeing as it calculates speed based on the actual rate of movement of the vehicle, not a wheel sensor.

What do you guys make of this?
Your correct about the GPS being far more accurate. The thing is, with my stock tires/wheels, my speedo was 3% off. If your was the same, combine that with your .8% difference and your getting close to your 5% discrepancy.

Black Yaris- Nice thread, very helpful! I'll reference tire/wheel PM's here from now on.
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Old 04-13-2007, 08:25 PM   #14
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ncie thread!!! I love it!

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Old 04-13-2007, 09:25 PM   #15
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funny thing is, Ich spreche Deutsch!

nice

Against your advice I did end up going with these for a 15X7 wheel....


Falken Ziex Ze 512
205/50R15 17.9Lbs.

I almost went with these guys ....

Falken Ziex Ze 512
225/50R15 20.1Lbs.
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Old 04-14-2007, 01:22 AM   #16
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This should be emailed to every new member,or better yet,a private message.
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Old 04-14-2007, 01:27 AM   #17
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Quote:
Originally Posted by brickhardmeat View Post
nice

Against your advice I did end up going with these for a 15X7 wheel....


Falken Ziex Ze 512
205/50R15 17.9Lbs.

I almost went with these guys ....

Falken Ziex Ze 512
225/50R15 20.1Lbs.
Hey to each there own, Just providing info, and my experiences, you may do as you wish to your own car
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Old 04-14-2007, 01:35 AM   #18
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Hey to each there own, Just providing info, and my experiences, you may do as you wish to your own car
I appreciate all the advice. Didn't go ignored.
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