Bolt pattern | stud pattern

Load index


How to determine the Load Index of a tire?


load index , speed rating




P205/55/R16 89V

On This example , the number 89 represents the load capability of a tire. For example this tire can handle a  load of approximately 1279 pounds.


Load Index Pounds Kilograms Load Index Pounds Kilograms
71 761 345 91 1356 615
72 783 355 92 1389 630
73 805 365 93 1433 650
74 827 375 94 1477 670
75 853 387 95 1521 690
76 882 400 96 1565 710
77 908 412 97 1609 730
78 937 425 98 1653 750
79 963 437 99 1709 775
80 992 450 100 1764 800
81 1019 462 101 1819 825
82 1047 475 102 1874 850
83 1074 487 103 1929 875
84 1102 500 104 1984 900
85 1135 515 105 2039 925
86 1168 530 106 2094 950
87 1201 545 107 2149 975
88 1235 560 108 2205 1000
89 1279 580 109 2271 1030
90 1323 600 110 2337 1060

By looking at the above chart , we can conclude that:

The higher the Load index, the greater the capability of tire for charring load.


At , you will fine lots of info about your wheels , rims .
You will fine bolt pattern. you will find stud pattern. you will find information about the wheels and rims on your car.
you can also find the information about your lug nuts, CB ( Center Bore ) or Center hole and offset of your rim. Most rims are interchangeable from one car to another car.
To find out you need to compare your bolt pattern with the bolt pattern of the wheel you have on hand. Sometimes its difficult to find out about the specific information about the rims if you only have the wheels but no stud or bold pattern information . i used to take my rim to a junk yard and try one on a different wheel hub with off course with calipers on the rims. Then i recorded the make, model and year of the car and was looking for the wheel information about that rims. That way i was finding my car's bold pattern. Now I am quite used to recognizing the stud pattern. Its my eyes that do the magic. i can easily tell if a rim will fit a car or not.
Its a couple factor that really decide if a rim will fit into a car.

Bold pattern | Stud pattern :
Used to describe the amount of lugs your car, or wheels, have, and also the measurement in between them.
For example, 5x4.5 This would be 5 lugs, spaced 4.5" across.
Also measure in mm, for example 5x114.3. 5 lugs, spaced 114.3 mm apart. 5x4.5 = 5x114.3

CB (Center Bore or Center Hole ) :
The centerbore of a wheel is the size of the hole in the back of the wheel that centers it over the mounting hub of the car.
Some factory wheels have a centerbore that matches exactly with the hub to reduce vibration by keeping the wheel centered. Wheels with the correct centerbore to the car they will be mounted on are known as hubcentric. Hubcentric wheels take the stress off the lug nuts, reducing the job of the lug nuts to center the wheel to the car.
Wheels that are not hubcentric are known as lugcentric, as the job of centering is done by the lug nuts assuming they are properly torqued down. Centerbore on aftermarket wheels must be equal to or greater than that of the hub, otherwise the wheel cannot be mounted on the car.
Many aftermarket wheels come with "hubcentric rings" that lock or slide into the back of the wheel to adapt a wheel with a larger centerbore to a smaller hub.[3] These adapters are usually made of plastic but also in aluminum. (Courtesy of Wikipedia)

Offset :
Offset is the measurement of where the mounting surface of the wheel is (where the bolt holes are), compared to the centerline of the wheel. Usually referred to as negative, positive, or zero offset or Low, Medium or High. other property of the wheels are also effective in deciding to purchase a rim for your car but basically i found the above properties most important.
Copyright © 2011 Bolt pattern | stud pattern