MX5200 inter axle ratio (drive train ratio)

dkselw

New member

Equipment
MX5200HD Z121S
May 30, 2022
9
1
3
Queensland Australia
Does any one know the MX5200 HST inter axle ratio (drive train ratio)?

I just had a MX5200 delivered with industrial tyres.
I was expecting 12-16.5 on the front and 17.5L-24 on the rear, as stated in the owners manual.
It came with 10-16.5 (Titan 4123C8) on the front and 420/70-24 (Titan 4866T2) on the rear.

The static loaded radius ratio for the 420/70-24 and 10-16.5 tyres is 1.56
The static loaded radius ratio for the 17.5L-24 and 12-16.5 tyres is 1.48

I have seen mentioned that you should aim for a front wheel lead of 1 to 5%. Another post said Kubota recommend 3 to 7 %.

A change in inter axle ratio of 1.48 to 1.56 seems large. But then I saw that the standard tyres for the MX5200 are 14.9-26 and 9.5-16. The static loaded radius ratio for these tyres is 1.58. So which one is right? Or perhaps it doesn't matter that much.

It might be a Kubota Australia thing, trying to reduce the number of tyres combinations to stock.
Looking at the Kubota Australia website, they list 10-16.5 tyres as an option for the front, but don't list a industrial tyre option for the rear. They also don't list the 12-16.5 tyre as an option for the front.
 

Schmitty

Member

Equipment
L4740, grapple, forks, box blade
Mar 25, 2018
42
9
8
Madison, WI
There should be multiple tables like this all in one thread in this tires subforum, searching should reveal it!
Tire Ratios for L-series tractors.jpg

I was lucky enough to find a table for an L4740.
 

dkselw

New member

Equipment
MX5200HD Z121S
May 30, 2022
9
1
3
Queensland Australia
If I use the Static Loaded Radius, I get a Lag of 0.3%
If I use the RC, I get a lead of 2.4%

leadlag.png


I guess I need to keep the front tyres hard and the rears soft. I will compare with the method in "TireInfo-LeadLag.pdf" sometime.