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Tümosan

Tümosan 81.80 (8180) tire size

Factory tire pairs for the Tümosan 81.80 (8180) (76 HP, 4WD):

  • 76 HP
  • 4WD
Rear16.9/14-30Front11.2/10-24
4WD
Rear
16.9/14-30
Outside dia.
1,485mm
Width
429mm
Rim
30″
radial equivalent: 420/85R30 (16.9R30)
420/85R30
Outside dia.
1,475mm
Width
420mm
Rim
30″
Original bias-ply: 16.9/14-30 · 16.9R30
Front
11.2/10-24
Outside dia.
1,105mm
Width
284mm
Rim
24″
radial equivalent: 280/85R24 (11.2R24)
280/85R24
Outside dia.
1,086mm
Width
282mm
Rim
24″
Original bias-ply: 11.2/10-24 · 11.2R24
4WD
Rear
13.6/12-36
Outside dia.
1,515mm
Width
345mm
Rim
36″
radial equivalent: 340/85R36 (13.6R36)
340/85R36
Outside dia.
1,492mm
Width
343mm
Rim
36″
Original bias-ply: 13.6/12-36 · 13.6R36
Front
12.4/11-24
Outside dia.
1,160mm
Width
315mm
Rim
24″
radial equivalent: 320/85R24 (12.4R24)
320/85R24
Outside dia.
1,154mm
Width
319mm
Rim
24″
Original bias-ply: 12.4/11-24 · 12.4R24
4WD
Rear
13.6/12-38
Outside dia.
1,565mm
Width
345mm
Rim
38″
radial equivalent: 340/85R38 (13.6R38)
340/85R38
Outside dia.
1,540mm
Width
343mm
Rim
38″
Original bias-ply: 13.6/12-38 · 13.6R38
Front
12.4/11-24
Outside dia.
1,160mm
Width
315mm
Rim
24″
radial equivalent: 320/85R24 (12.4R24)
320/85R24
Outside dia.
1,154mm
Width
319mm
Rim
24″
Original bias-ply: 12.4/11-24 · 12.4R24
4WD
Rear
16.9-30
Outside dia.
1,485mm
Width
429mm
Rim
30″
Original radial: 420/85R30
420/85R30
Outside dia.
1,475mm
Width
420mm
Rim
30″
Front
320/70R24
Outside dia.
1,084mm
Width
319mm
Rim
24″
tube-type equivalent: 11.2-24

The tires on the tractor may not be original. A different size from the factory one can damage the transmission, especially on 4WD.

What do the Tümosan 81.80 (8180) tyre sizes mean?

420/85R30 is a radial tyre: section width 420 mm, sidewall height 85% of the width, rim diameter 30 inches. The “R” marks radial construction. Outside diameter is about 1,475 mm.

320/70R24 is a radial tyre: section width 320 mm, sidewall height 70% of the width, rim diameter 24 inches. The “R” marks radial construction. Outside diameter is about 1,084 mm.

In this pair the rear tyre's outside diameter is about 1.34 times the front. On 4WD tractors the front-to-rear tyre ratio must match the driveline ratio, so keep it when changing tyres.

3 other Tümosan models use the same rear size (16.9/14-30).

Read more: How to read a tyre size · 4WD front–rear tyre ratio · Tractor tyre pressure

Technical data

Engine
4 silindir

Values come from manufacturer or dealer sources; check the label of the existing part before buying. · Source: tumosan.com.tr

Also written as: Tümosan 81.80 · Tümosan 8180 · Tümosan 81 80 · Tümosan 81-80

Take it to your tire shop: tractor-size.com

4WD ratio check and other tools →

Source: tumosan.com.tr

FAQ

What is the front tire size of the Tümosan 81.80 (8180)?

The Tümosan 81.80 (8180) comes from the factory with 11.2/10-24 or 12.4/11-24 or 320/70R24 front tires.

What is the rear tire size of the Tümosan 81.80 (8180)?

The Tümosan 81.80 (8180) comes from the factory with 16.9/14-30 or 13.6/12-36 or 13.6/12-38 or 420/85R30 rear tires.

Can I fit a different tire size on the Tümosan 81.80 (8180)?

Equivalent sizes with a very close outside diameter can be fitted (e.g. the radial equivalent). On 4WD, a changed front/rear ratio can damage the driveline, so check it with the 4WD ratio tool first.

Other Tümosan models

All makes

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