Peter winn tyres Limited
Trelleborg and Pirelli Tyres Appointed
Specialist tyre distributor
Interchangeable tractor tyre sizes and Trelleborg
equivalents
Although the rim diameters of the Pirelli range remain identical for wider tyres, the Trelleborg wide equivalents do not have exactly the same rim diameters, although their rolling circumference is close to that of the standard tyre. Tractor owners planning to upgrade a 4wd tractor to wider tyres should ensure that front wheel lead remains within the manufacturers' tolerances, otherwise transmission “wind-up ” may occur. If in any doubt please contact us providing as much detail as possible.
To see enlarged chart click on this image
|
(1)
New metric markings replacing column (2) markings but have roughly the same dimensions |
(2)
markings for standard type tractor tyres all in inches |
(3)
70 series size markings wider than (1) and (2) |
(4)
65 series size markings wider than (1) , (2) and (3) Pirelli TM800 Michelin XM108 Firestone 9000 |
(5)
Equivalent Trelleborg TWIN tyre |
|
280/85 R 20
|
11.2R20
|
--------------
|
-------------
|
---------
|
|
320/85 R 20
|
12.4R20
|
--------------
|
420/65R20
|
---------
|
|
280/85 R 24
|
11.2R24
|
320/70R24
|
--------------
|
---------
|
|
320/85 R 24
|
12.4R24
|
360/70R24
|
420/65R24
|
400/60-22.5
|
|
340/85 R 24
|
13.6R24
|
380/70R24
|
440/65R24
|
400/60-22.5
|
|
380/85 R 24
|
14.9R24
|
420/70R24
|
480/65R24
|
500/60-22.5
|
|
420/85 R 24
|
16.9R24
|
480/70R24
|
540/65R24
|
600/55-26.5
|
|
420/85 R 26
|
16.9R26
|
480/70R26
|
540/65R26
|
600/55-26.5
|
|
280/85 R 28
|
11.2R28
|
320/70R28
|
-------------
|
-------------
|
|
320/85 R 28
|
12.4R28
|
360/70R28
|
420/65R28
|
500/60-26.5
|
|
340/85 R 28
|
13.6R28
|
380/70R28
|
440/65R28
|
--------------
|
|
380/85 R 28
|
14.9R28
|
420/70R28
|
480/65R28
|
600/55-26.5
|
|
420/85 R 28
|
16.9R28
|
480/70R28
|
540/65R28
|
600/55-30.5 or
750/45-30.5 |
|
380/85 R 30
|
14.9R30
|
420/70R30
|
-------------
|
600/55-30.5
|
|
420/85 R 30
|
16.9R30
|
480/70R30
|
540/65R30
|
600/60-30.5 or
750/50-30.5 |
|
460/85 R 30
|
18.4R30
|
520/70R30
|
600/65R30
|
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|
|
320/85 R 32
|
12.4R32
|
360/70R32
|
-------------
|
-----------
|
|
--------------
|
24.5R32
|
--------------
|
-------------
|
-----------
|
|
--------------
|
30.5LR32
|
--------------
|
800/65R32
|
-----------
|
|
420/85 R 34
|
16.9R34
|
480/70R34
|
540/65R34
|
-----------
|
|
460/85 R 34
|
18.4R34
|
520/70R34
|
600/65R34
|
800/55-30.5,
700/55-34 or 800/50-34 |
|
320/85 R 36
|
12.4R36
|
--------------
|
-------------
|
-----------
|
|
340/85 R 36
|
13.6R36
|
-------------
|
-------------
|
-----------
|
|
340/85 R 38
|
13.6R38
|
-------------
|
-------------
|
-----------
|
|
380/85 R 38
|
14.9R38
|
420/70R38
|
-------------
|
-----------
|
|
---------------
|
15.5R38
|
--------------
|
-------------
|
-----------
|
|
420/85 R 38
|
16.9R38
|
480/70R38
|
540/65R38
|
-----------
|
|
460/85 R 38
|
18.4R38
|
520/70R38
|
600/65R38
|
650/60-38
|
|
520/85 R 38
|
20.8R38
|
580/70R38
|
650/65R38
|
710/65-38
or 850/50-38 |
|
520/85 R 42
|
20.8R42
|
580/70R42
|
650/65R42
|
850/55-42
|
PETER WINN TYRES LIMITED
REG. OFFICE; 1 GARTH'S END, POCKLINGTON, YORK .EAST YORKSHIRE YO42 2HZ.
REG. OFFICE; 1 GARTH'S END, POCKLINGTON, YORK .EAST YORKSHIRE YO42 2HZ.
