Width
165
195
225
255
285
315
345
175
205
235
265
295
325
355
185
215
245
275
305
335
365
Ratio
25
35
45
55
65
75
85
12.5
30
40
50
60
70
80
11.5
13.5
Diameter
14
16
18
20
22
24
26
15
17
19
21
23
25
28
How to read your tire size? Find out here!
Search by Size
Width
165
195
225
255
285
315
345
175
205
235
265
295
325
355
185
215
245
275
305
335
365
Ratio
25
35
45
55
65
75
85
12.5
30
40
50
60
70
80
11.5
13.5
Diameter
14
16
18
20
22
24
26
15
17
19
21
23
25
28

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Choose us for your online tire purchase and experience unbeatable convenience and value. We offer a vast selection of premium tires at great prices, complete with expert reviews and easy-to-understand product details. Enjoy fast shipping and local installation options. Our friendly customer support team is always ready to help. Buy your tires online with us for a seamless and stress-free experience!

How to find your tire size?

How to find
your tire size?

Use our guide above to easily and quickly find your tire size from the side of your existing tires. Still need help? Alternatively you can take a picture of your tire and send it to us here.

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How to read your tire size?

The first number to appear in your tire size information is the width, in millimeters, of the correct tires for your vehicle: P245/35ZR20 91Y. Tire width always refers to the measurement from one sidewall to another. Thus, a tire with the measurement “P245” is for a passenger vehicle and has a nominal width of 245 millimeters

The first number to appear in your tire size information is the width, in millimeters, of the correct tires for your vehicle: P245/35ZR20 91Y. Tire width always refers to the measurement from one sidewall to another. Thus, a tire with the measurement “P245” is for a passenger vehicle and has a nominal width of 245 millimeters.

After the slash mark, the next number you see is for the tire’s aspect ratio, which essentially tells you how tall your tire’s profile is: P245/35ZR20 91Y. Aspect ratios are delivered in percentages. Tire makers calculate the aspect ratio by dividing a tire’s sidewall height by its width “P245”. If a tire has an aspect ratio of 35, it means the tire’s height is 35% of its width or “P245”.

The next number is the wheel’s diameter. For example, a tire with the P245/35ZR20 91Y would fit a rim with a 20-inch diameter. Take note: if you decide to change your rims’ size, you will also need to get new tires that are compatible with the change in size. Tires designed to fit a 20-inch wheel diameter will not stretch to fit on new 22-inch rims.

It is called the load “index” because the figure doesn’t tell us the precise number of pounds the tire can support, at least not by itself. Instead, the number corresponds to a specific load capacity listed in an index. Beginning with one and ending with 150, numbers in the load index represent carrying capacities of 99 to 7385 lbs.

Load Index Pounds Kilograms
70 739 335
71 761 345
72 783 355
73 805 365
74 827 375
75 853 387
76 882 400
77 908 412
78 937 425
79 963 437
80 437 450
81 1,019 462
82 1,047 475
83 1,074 487
84 1,102 500
85 1,135 515
86 1,168 530
87 1,201 545
88 1,235 560
Load Index Pounds Kilograms
89 1,279 580
90 1,323 600
91 1,356 615
92 1,389 630
93 1,433 650
94 1,477 670
95 1,521 690
96 1,565 710
97 1,609 730
98 1,653 750
99 1,709 775
100 1,764 800
101 1,819 825
102 1,874 850
103 1,929 875
104 1,984 900
105 2,039 925
106 2,094 950
107 2,149 975
Load Index Pounds Kilograms
108 2,205 1,000
109 2,271 1,030
110 2,337 1,060
111 2,403 1,090
112 2,469 1,120
113 2,535 1,150
114 2,601 1,180
115 2,679 1,215
116 2,756 1,250
117 2,833 1,285
118 2,910 1,320
119 2,998 1,360
120 3,086 1,400
121 3,197 1,450
122 3,307 1,500
123 3,417 1,550
124 3,527 1,600
125 3,638 1,650
126 3,748 1,700

The final figure in a tire size sequence is the speed rating indicated by a letter: P245/35ZR20 91Y. Just as your load index number corresponds to a particular load, your speed rating letter corresponds to a specific speed capability based on a standardized laboratory test. Here are the most common letters for speed ratings and their corresponding maximum speeds:

Speed Rating Speed (km/h) Speed (mph)
A1 5 3
A2 10 6
A3 15 9
A4 20 12
A5 25 16
A6 30 19
A7 35 22
A8 40 25
B 50 31
C 60 37
Speed Rating Speed (km/h) Speed (mph)
D 65 40
E 70 43
F 80 50
G 90 56
J 100 62
K 110 68
L 120 75
M 130 81
N 140 87
P 150 93
Speed Rating Speed (km/h) Speed (mph)
Q 160 99
R 170 106
S 180 112
T 190 118
U 200 124
H 210 130
V 240 149
W 270 168
Y 300 186
ZR Over 2400 Over 150

A quick guide to decoding

the information on
the tire sidewall

How to read my tires?

Find out Here

How to pick up my tires?

Learn more

How to contact Us?

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How to read my tires?

Find out here

How to pick up my tires?

Learn more

How to contact Us?

Call

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Galuma Tires & Wheels can deliver

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