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 !