Looking for tire advice for Deere 770

[Jaygyver]

In the for what it's worth category of replies, I have a JD 2320 equipped with R4's. Although they work fine for me for most of my needs around the house and in the woods, I soon learned they were helpless on ice or hard packed snow. After some research, I bought a tire groover and grooved the center of the lugs on the R4's. What a difference! Traction on ice and hard packed snow was vastly improved.

You know, if the lugs on the R-4's were a bit deeper I think that would help, at least until they got worn. Maybe I'll try the tire groover, $1500 a couple years ago to switch wheels/tires can wait a bit more.

 

[LouNY]

All of the major and even many of the smaller tire manufactures will have specification sheets for their tires. Those will list the O.D. of the tire and much more info on the tires. Even within the same manufacturer all of the different models of there tire will have different dimensions with the same listed size. One of the important measurement will be loaded rolling circumference, or loaded radius which are the important numbers. I have seen more then 8 inches difference in rolling circumference for the same nominal size in the different series of R1 tires they offer.

 

[evan waa]

You should get the mechanical ratio between the front and rear axles. Then even though the tire number sizes may be the same. The rolling circumference of tires varies with number of lugs and number of plies and manufacture of the tire at the factory rated pressure. You would probably want about a 2 to 3 % pull 5 % is high