How to read Car Tyre Size? - Mechdor

How to read Car Tyre Size?

 {205/55 R 16 91 W}
Tyre width:-  205 in millimetres.
Tyre Profile:-  55.
R:- It is not required.
16:- Tyre size/ the diameter of the tyre inner
                       rim in inches.    
91              :- Load rating.
W             :- Speed rating.
Car tyres load index rating:-   
 Load index   -  Max. Load

 81                 -  462

 82                 -  475

 85                 -  515

 86                 -  530

 87                 -  545

 88                 -  560

 90                 -  600

 92                 -  630

   
 
 Car tyres speed symbol rating:-

Speed Symbol  - Max. Speed

N                      - 140

P                       - 150

Q                      - 160 

R                      - 170

S                       - 180

T                       - 190 

H                      - 210

V                      - 240 

W                     - 270

Y                      - 300

                                                                 

Bike Tyres Sizes:-

{ 180/55 Z R 17 M/C [73W] TL}

180:- Width of the tyre in millimetres
55:- Tyre profile, indicate the aspect ratio or height. Represented the % of the width,  for ex- Height of the tyre is 55% of 180mm w, which equates to 99mm.
Z:- It indicates what speed the tyre is capable of being taken over. It doesn’t tell us the max. Tolerable speed of the tyre that comes later in the code in the bracket.
R:- Construction type of the tyre. It has radial construction.
17:- Tyre size, dia. Of the tyre in inches.
M/C:- It is suitable for a bike.
73:- It represents the load index of the tyre, which specifies the max. load the tyre can carry.
W:- Max. capable speed.
TL:- Tubeless tyre, if you see `TT’ then it is a tube-type tyre.
 
Load Index  - Weight in kg:-

          20          - 80

          22          - 85

       24          - 85

       26          - 90

       28          - 100

       30          - 106

For more about load index /Weight in kg or Speed index of car ,click here to download:-

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