Tractor-Size › Universal › 643
Universal

Universal 643 tire size

Factory tire pairs for the Universal 643 (64 HP, 2WD / 4WD):

  • 64 HP
  • 2WD / 4WD
Rear14.9R28Front6.00-16
2WD
Rear14.9R28
Outside dia.
1,350mm
Width
380mm
Rim
28″
tube-type equivalent: 14.9/13-28
Front6.00-16
Outside dia.
735mm
Width
165mm
Rim
16″
4WD
Rear12.4R36
Outside dia.
1,458mm
Width
319mm
Rim
36″
tube-type equivalent: 12.4/11-36
Front9.5-24
Outside dia.
1,050mm
Width
241mm
Rim
24″
radial equivalent: 9.5R24

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

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

4WD ratio check and other tools →

Source: tractordata

FAQ

What is the front tire size of the Universal 643?

The Universal 643 comes from the factory with 6.00-16 or 9.5-24 front tires.

What is the rear tire size of the Universal 643?

The Universal 643 comes from the factory with 14.9R28 or 12.4R36 rear tires.

Can I fit a different tire size on the Universal 643?

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 Universal 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 →