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Conversion for Tractor Tires

 


The size of the tire can be signed in inches or millimetres.
For example 16.9 R34 is an inch size the equivalent size signed in mm is 420/85 R34. This is exactly the same size, the only difference is how the size is written!


The tire size can be composed with two sets of numbers, for example:
6.50-16, 12.4-24 or 18.4-38
1. number 6.50-16 is the width in inches
2. number 6.50-16 is the diameter of the rim.

A tire size can be composed also in three sets of numbers:
like 16x6.50-8, 31x15.50-15.3 or 25x12.00-12
1. number 16x6.50-8 is the height
2. number 16x6.50-8 is the width,
3. number 16x6.50-8 is the size of the rim.



If you search in our system we show you the results also in the equivalent size (inch to mm / mm to inch). In this table you will find also your equivalent size for low section tyres like 480/70R34


650/65R38
650 = Width of the tyre in mm (side-wall to side-wall, not the pattern-size!)
65 = Height percentage of width (650mm x 0.65= 422.5mm)
R = for Radial Tyres
38 = Diameter in Inch


STANDARD
SERIES
Inch
STANDARD
SERIES
mm
WIDE
SERIES /70
EXTRA LARGE
SERIES /65 *
NARROW
SERIES /95 *
7.50-16   260/70R16
280/70R16
320/65R16  
7.50-18   260/70R18
280/70R18
320/65R18  
10.5-18 275/80R18 280/70R18 340/65R18  
7.50-20   260/70R20
280/70R20
   
9.5-20 275/80R20 300/70R20    
10.5-20 275/80R20 320/70R20   8.3R24
11.2R20 280/85R20 320/70R20   8.3R24
12.4R20 320/85R20 360/70R20 420/65R20 9.5R24
12.5R20 340/75R20
335/80R20
340/80R20
375/70R20 420/65R20 9.5R24
13.6R20   360/70R20    
14.5-20 375/75R20
380/75R20
405/70-20   11.2R24
9.5R24 250/85R24 300/70R24    
11.2R24 280/85R24 320/70R24    
12.4R24 320/85R24 360/70R24 420/65R24 9.5R28
13.6R24 340/85R24 380/70R24 440/65R24 210/95(8.3)R32
11.2R28
14.9R24 380/85R24 420/70R24 480/65R24 230/95(9.5)R32
11.2R32
12.4R28
16.9R24 420/85R24 480/70R24 540/65R24 210/95(8.3)R36
270/95(11.2)R32
16.9R26   480/70R26 540/65R26 230/95(9.5)R36
23.1R26 620/75R26     230/95(9.5)R44
28.1R26 750/65R26      
9.5R28 25085R28      
11.2R28 280/85R28 320/70R28   210/95(8.3)R32
12.4R28 320/85R28 360/70R28 420/65R28 230/95(9.5)R32
13.6R28 340/85R28 380/70R28 440/65R28 210/95(8.3)R36
230/95(9.5)R32
14.9R28 380/85R28 420/70R28 480/65R28 230/95(9.5)R36
270/95(11.2)R32
16.9R28 420/85R28 480/70R28 540/65R28 270/95(11.2)R36
14.9R30 380/85R30 420/70R30 480/65R28 270/95(11.2)R36
16.9R30 420/85R30 480/70R30 540/65R30 230/95(9.5)R40
270/95(11.2)R38
18.4R30 460/85R30 520/70R30 600/65R30 210/95(8.3)R44
230/95(9.5)R42
8.3R32 210/95R32      
9.5R32 230/95R32      
11.2R32 270/95R32      
12.4R32 320/85R32     230/95R36
30.5LR32 800/65R32     340/85(13.6)R48
380/90(14.9)R46
12.4R34 320/85R34     290/95R34
16.9R34 420/85R34 480/70R34
500/70R34
540/65R34 230/95(9.5)R44
270/95(11.2)R42
18.4R34 460/85R34 520/70R34 600/65R34 270/95(11.2)R44
300/95(12.4)R42
320/90R42
20.8R34       270/95R48
300/95R46
8.3R36 210/95R36      
9.5R36 230/95R36      
11.2R36 270/95R36      
12.4R36 320/85R36     210/95(8.3)R42
230/95(9.5)R40
13.6R36 340/85R36     210/95(8.3)R44
230/95(9.5)R40
270/95(11.2)R38
11.2R38 270/95R38      
12.4R38       230/95(9.5)R42
(13.6)R36
13.6R38 340/85R38     230/95(9.5)R44
270/9.5)R44
270/95(11.2)R42
14.9R38 380/85R38     230/95(9.5)R44
270/95(11.2)R42
16.9R38 420/85R38 480/70R38 540/65R38 230/95(9.5)R48
270/95(11.2)R46
18.4R38 460/85R38 520/70R38 600/65R38 270/95R48
300/95(12.4)R46
20.8R38 520/85R38 580/70R38
620/70R38
650/65R38 300/95(12.4)R52
320/90R50
18.4R42 480/80R42
460/85R42
    (14.9)R46
20.8R42 520/85R42 580/70R42
620/70R42
650/65R42 270/95(11.2)R54
300/95(12.4)R52
320/90R54
14.9R46 380/85R46
420/80R46
380/90R46
    340/85(13.6)R48
300/95(12.4)R52
320/90R50
18.4R46 460/85R46
480/80R36
  650/65R46 270/95(11.2)R54
300/95(12.4)R52
320/90R54
20.8R46 520/85R46 620/70R46   480/80R50
18.4R50 480/80R50      

(*) = change of rim necessary !