Meaning of the lateral tire registration

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Meaning of the lateral tire registration

Meaning of the lateral tire registration
 

 

Surely you noticed that on the side of the tire contains a string of numbers and letters that is a code in which the main geometrical characteristics are defined rim . This inscription refers mainly to the extent of binding between tire and rim .
 
 
 
The dimensions are in inches, their equivalence in the metric system is: 1 inch = 25.4 mm.
 
 
 
The type of registration that we will usually be something like :
 
6 J x 15 H ET26 4/100
 
 
 
The first number indicates the inner rim width between flanges for cars is usually between 4 "and 9" .
 
 
 
The letter then refers to the flange profile , specifically its height. For the flat base and the letter B for better safety profile or honda base is used , the letter J.
 
 
 
The following figure is the measured inside diameter of the bead seat on the nearest part of the rim flange . This measure, for passenger cars, usually between 13 " and 17" .
 
 
 
The width and diameter are the main dimensions of the rim, are interrelated and influence the choice of the correct tires .
 
Equivalence between common rims and tires:
 

Equivalencia entre llantas y neumáticos más habituales

Wheel

Tire

Mínium

Ideal

Máx.

Dimensiones

4

5

6

165/70 R 13

4,5

5,5

6

175/70 R 13

5

5,5

6,5

185/70 R 13

5,5

6

7

195/70 R 13

5

5,5

7

185/60 R 14

5,5

6

7

195/60 R 14

5,5

6

7,5

205/60 R 14

6

6,5

8

225/60 R 14



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The next letter describes the type of profile or the base rate of the throat. For example :
 
H : Base honda ( Hump )
 
H2: Double deep base ( Hump 2)
 
FH : Flat hump
 
CH : Combination hump
 
SL : Special ledge
 
 
 
The following data is pumping wheel , the distance in millimeters between the symmetry line of the rim and the inside of the hub bearing plane . Pumping can be :
 
zero , if they match the central line of symmetry and the hub surface .
Positive ( outset ) , if the center of the cube is displaced outwards.
Negative ( inset ) when displaced to the interior.
 
 
This feature is important , since a variation in the pumping means to vary the width of the path of the car.
 
 
 
Finally , the number of anchor holes in the hub of the rim and the circumferential diameter thereof relative to the central axis of the hub or PDC (Pitch Center Diameter) is indicated .

 

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