Rib Options for Front Tractor Tires
Single Rib – This pattern was designed for tractor that primarily operate in loose or wet/muddy soil conditions. The tall single rib develops excellent force when steering and there are no grooves to fill up with mud. With the single rib, it does wear out faster on paved surfaces because all the weight is being carried on the tall rib.
Three Rib – This pattern was designed for tractors that operate in a mixture of loose soils and paved surface. The taller center rib develops the force when steering in loose soil and the outside ribs help carry the load when operating on paved surfaces.This tread pattern is an excellent choice for most 2WD tractors without front-end loaders.
Four Rib – This pattern was designed for tractors that operate in a mixture of loose soils and paved surfaces and have a front-end loader. The four ribs develop the force when steering in soils and on paved surfaces while the constant rib height provide an even load distribution on hard surfaces. This even load distribution contributes to longer tire life on hard surfaces especially when used on tractors with front-end loaders. It should be noted with any loader application be sure to check the load capacity of the tire and compare with the front axle load of the tractor in combination with the loader and a full loader bucket.
Shallow Five Ribs – This pattern was designed for tractor and backhoes that operate mainly on paved surface and have a front-end loader. Operating on paved surfaces requires less rib height to prove a steer force and the larger number of ribs allow for a greater load distribution.
The excerpt comes from here:
https://commercial.firestone.com/en-us/ ... actor-tire
I read this a while ago and that made me try and find a good 3 rib or 4 rib tire. But lost interest because the original 644 tires seem to do just fine.
