Tractor Tire Selection, the Differences Between R1, R3, & R4By
When choosing the right tractor for your needs you will also be faced with making a proper tire selection. And when you are a first time tractor buyer it is difficult to know what is best. I know I struggled with this decision when buying my tractors. The tires are classified in the industry as R1, R3, and R4 which designates the construction, sizes, and treads.
The R1 tire is the “agricultural” tread which is the most aggressive in providing excellent traction and is superior in the field and muddy conditions. There are 2 different types of R1 tires, rice paddy found on the Japanese tractors and regular Ag tread found on most farm tractors. Rice paddy tires have deeper lug treads which help “paddle” the unit through very wet muddy conditions. Regular Ag is more of the field tire if choice. It does not have as deep of a lug as the Rice paddy tire and yet it still provides excellent traction. The R1 Ag tire provides a better ride on the fields and roads. R1 tires are also self-cleaning so when operating in muddy conditions the distance between the lugs is large enough that the mud has a difficult time sticking to the tire. R1 tires also are the narrowest of the three.
R3 tires are generally known as “turf” tires and are most commonly found on the golf course or the typical riding mower. Turf tires are grass friendly and tend not to tear the ground up, especially in soft wet conditions. They also have the most ground contact area since they have the shallowest tread depth. R3s do provide the smoothest ride compared with the other two types. R3 tires are also the widest of the three to help provide a large ground contact patch to yield a large traction area to the ground. This tread pattern is not very efficient in a muddy environment. Bear in mind though, one can still do damage to the lawn if the wheel is allowed to spin.
The last is the R4 or “industrial” tire. This tire is commonly used by contractors, landscapers, and now home owners as an all-purpose tractor tire. It has large, shallow, closely spaced lugs that provide traction and is still easy on the lawn. The R4 tread is designed similar to the R1 in that it tends to be self-cleaning. The R4 tire has a very sturdy sidewall construction capable of handling heavier loading. This means that if you have loader work, these tires will handle it unlike the R1 and R3 with softer sidewalls. R4 tires provide great traction and being that they are wider than the R1 tire, they gain the advantage of extra contact with the ground. Due to its large contact area with the ground the R4 tire is easy on the lawn. In 2wd, the R4 tire will be no more damaging to a lawn than a R3.