Tractor-Size › New Holland › T3.70S
New Holland

New Holland T3.70S tire size

Factory tire pairs for the New Holland T3.70S (65 HP, 4WD):

  • 65 HP
  • 4WD
Rear380/85R28Front300/70R20
4WD
Rear
14.9-28
Outside dia.
1,365mm
Width
378mm
Rim
28″
Original radial: 380/85R28
380/85R28
Outside dia.
1,350mm
Width
380mm
Rim
28″
Front
300/70R20
Outside dia.
954mm
Width
290mm
Rim
20″
No bias-ply equivalent
4WD
Rear
14.9-30
Outside dia.
1,415mm
Width
378mm
Rim
30″
Original radial: 380/85R30
380/85R30
Outside dia.
1,404mm
Width
380mm
Rim
30″
Front
320/70R20
Outside dia.
983mm
Width
319mm
Rim
20″
No bias-ply equivalent

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 T3.70S tyre sizes mean?

380/85R28 is a radial tyre: section width 380 mm, sidewall height 85% of the width, rim diameter 28 inches. The “R” marks radial construction. Outside diameter is about 1,350 mm.

300/70R20 is a radial tyre: section width 300 mm, sidewall height 70% of the width, rim diameter 20 inches. The “R” marks radial construction. Outside diameter is about 954 mm.

380/85R30 is a radial tyre: section width 380 mm, sidewall height 85% of the width, rim diameter 30 inches. The “R” marks radial construction. Outside diameter is about 1,404 mm.

320/70R20 is a radial tyre: section width 320 mm, sidewall height 70% of the width, rim diameter 20 inches. The “R” marks radial construction. Outside diameter is about 983 mm.

In this pair the rear tyre's outside diameter is about 1.42 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 New Holland models use the same rear size (380/85R28).

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

Also written as: New Holland T370S · New Holland T3 70S · New Holland T3-70S

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 T3.70S?

The New Holland T3.70S comes from the factory with 300/70R20 or 320/70R20 front tires.

What is the rear tire size of the New Holland T3.70S?

The New Holland T3.70S comes from the factory with 380/85R28 or 380/85R30 rear tires.

Can I fit a different tire size on the New Holland T3.70S?

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

⚠️ Is this size wrong? Report it
Was this useful?Can't find your model or size? Tell us and we'll add it →