Search
< Continue Shopping
Sign in with Google
Sign in with Apple
Width
Ratio
Diameter
Why buy your tires online with us?
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.
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?
How to pick up my tires?
How to contact Us?
How to read my tires?
Find out hereHow to pick up my tires?
Learn moreHow to contact Us?
CallAll services in our shop
Payment options
Whatever your budget or payment preference,
Galuma Tires & Wheels can deliver
With Galuma Tires & Wheels, there’s no need to wait to get the tires you need. We offer a variety of flexible payment options to make your shopping experience as convenient as possible. You can pay for your purchase using major credit cards, including Visa, MasterCard, and American Express, Cash On Site, Amazon Pay, all Stripe services, Afterpay and Affirm. No matter which method you choose, you can shop with confidence knowing your transactions are safe and secure.
Payment options
Whatever your budget or payment preference,
Galuma Tires & Wheels can deliver
Help & advice
Please call us at 954-366-5694
Our customer service opening hours are:
Monday - Friday 9:00am - 6:30pm
Saturday 10:00am - 5:00pm
Click To Contact