Tractor with 4 equally sized tires

[msjanket]

I have a marvelous Holder A50 tractor, 4 WD, all tires are same size. I need to replace the fronts due to cracking and I can get a good deal with tires just 0.1 inch taller than the ones on the back. Now, seeing this is the situation, am I OK with putting the new ones on the front rather than the back axle?

Am I looking for trouble with these tires or will slippage in dirt negate any discrepancy in tire circumference?

 

[bcp]

0.1 taller is about 0.3 in circumference, which may be about 7-8 feet of ground travel for the slippage to take place. And you will slip more than that in a turn.

I wouldn't worry about it. A little difference in weight or inflation can make that much difference in height.

Bruce

 

[Jd5203]

I'd put the slightly larger ones on for a little bit with your old tires and try to get them a little closer then change out the next set so then they are even just for the **** of it. But then again, it will be more slippage in turn so don't worry about it and just change them all at once.

 

[Mace Canute]

Worrying about a .1" difference in height is pretty well pointless. Inflation pressures and weight on each axle are something you can control (to a degree) and will make as much of and likely more of a difference than a .1" diameter difference.

FYI, the rolling radius is what determines the distance traveled per tire revolution, not the circumference.

 

[bcp]

And the weight and inflation determine the rolling radius.



Also, if you are measuring tires to compare, mounted and dismounted makes a difference, too.

Bruce

 

[newbury]

My tires wear more than that.

 

[Creamer]

Not sure about Holder tractors but most want the front wheels pulling just a little - definitely do not want pushing.

 

[TomSeller]

Negligible difference, don't worry. Variation in manufacture and in pressure can account for more than that.

 

[Renze]

At wheel loaders which had the biggest rear axle of ZF's light axle series, and the lightest front axle of the heavy series, there was also a small difference in total reduction ratio, like 3% or so. Therefor the inflation pressure was prescribed as 2 front and 2.5 bar in the rear tires.

with equal wheeled tractors or loaders you dont want the front wheels pulling 3-5% faster to be able to have that 4wd find its way around the corner because the front wheels make a larger circle than the rears, in case of front wheel steering. With equal weight distribution the front wheels, in 4wd mode, will allways go around the corner, instead of being pushed straight ahead because the rear axle is heavier.
In fact i think the front axle of the Holder is heavier (which in turn, causes loaded radius differences anyways)