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New Holland

New Holland 70-66S tire size

Factory tire pairs for the New Holland 70-66S (65 HP, 2WD / 4WD):

  • 65 HP
  • 2WD / 4WD
Rear14.9-28Front7.50-16
2WD
Rear
14.9-28
Outside dia.
1,365mm
Width
378mm
Rim
28″
radial equivalent: 380/85R28 (14.9R28)
380/85R28
Outside dia.
1,350mm
Width
380mm
Rim
28″
Original bias-ply: 14.9-28 · 14.9R28
Front
7.50-16
Outside dia.
805mm
Width
205mm
Rim
16″
No radial equivalent
4WD
Rear
14.9-30
Outside dia.
1,415mm
Width
378mm
Rim
30″
Original radial: 14.9R30
14.9R30
Outside dia.
1,404mm
Width
380mm
Rim
30″
Front
12.4R20
Outside dia.
1,052mm
Width
319mm
Rim
20″
No bias-ply equivalent
4WD
Rear
16.9-30
Outside dia.
1,485mm
Width
429mm
Rim
30″
Original radial: 16.9R30
16.9R30
Outside dia.
1,475mm
Width
420mm
Rim
30″
Front
11.2-24
Outside dia.
1,105mm
Width
284mm
Rim
24″
Original radial: 11.2R24
11.2R24
Outside dia.
1,086mm
Width
282mm
Rim
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 New Holland 70-66S tyre sizes mean?

14.9-28 is an inch-sized tyre: section width about 14.9 inches, rim diameter 28 inches. The dash (-) marks bias (cross-ply) construction. Outside diameter is about 1,365 mm.

7.50-16 is an inch-sized tyre: section width about 7.50 inches, rim diameter 16 inches. The dash (-) marks bias (cross-ply) construction. Outside diameter is about 805 mm.

In this pair the rear tyre's outside diameter is about 1.33 times the front. On 4WD tractors the front-to-rear tyre ratio must match the driveline ratio, so keep it when changing tyres.

63 other New Holland models use the same rear size (14.9-28).

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

Also written as: New Holland 7066S · New Holland 70 66S

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

4WD ratio check and other tools →

Source: newholland.com.tr

FAQ

What is the front tire size of the New Holland 70-66S?

The New Holland 70-66S comes from the factory with 7.50-16 or 12.4R20 or 11.2R24 front tires.

What is the rear tire size of the New Holland 70-66S?

The New Holland 70-66S comes from the factory with 14.9-28 or 14.9R30 or 16.9R30 rear tires.

Can I fit a different tire size on the New Holland 70-66S?

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 New Holland models

All makes

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