Front tires caused axle failure...?

[RickB]

Tire radius / diameter was not a factor. Tire width / rim offset may have been. Consensus or not, you will never know for sure if the failure would have occurred with stock wheel equipment.

 

[Egon]

I値l suggest the wider tires put more stress on the system when turning. ( the outer edge of the tire has to cover more distance than the inner edge ) ( sorta the same as the requirement foe a differential )

 

[oosik]

I only use 4WD when absolutely necessary. There is no need for the extra stress on driveline components. Things will wear out soon enough without "encouragement".

 

[dragoneggs]

I only use 4WD when absolutely necessary. There is no need for the extra stress on driveline components. Things will wear out soon enough without "encouragement".

Me too, but it is necessary about 3/4 of the time on my property!

 

[/pine]

Tire radius / diameter was not a factor. Tire width / rim offset may have been. Consensus or not, you will never know for sure if the failure would have occurred with stock wheel equipment.

This is 100% conjecture...no different than any of the other speculations...unless of course you have actual comprehensive analytical scientific engineering analysis...??

 

[5030]

Wow 25 comments, some are correct, some are total BS. Kubota (and every other manufacturer has specific lead-lag specifications and when you change the front's you have to change the rears to, too maintain the correct lead-lag ratio or no matter what brand it is, if it's front wheel assist and you run in FWA much, you'll eat up the front driveline. Tire offset has nothing to do with it. On my units, both front and rear rims are adjustable for track.

The tire circumference isn't however., that is where the lead-lag ratio comes in. Tire width is inconsequential as well, the important thing again is the lead-lag ratio.

You ate up the FWA because your lead-lag ratio was focked up.

Finally, I only use FWA when necessary. 95% of the time I'm in 2wd. Use the front axle is turning as well as the prop shaft and transmission input gearset but it's not locked into mesh in the gearcase.

 

[5030]

This is 100% conjecture...no different than any of the other speculations...unless of course you have actual comprehensive analytical scientific engineering analysis...??

No, it's not at all. Lead-Lag ratio is what impacted his front axle. If you have (x) sized (od) tires on the front, width means zip, you need (x) sized (od) tires on the rear. How it works and tread width or wheel offset has zip to do with it.

I know you are gonna as what is the correct lead-lag ratio with different tire sizes and I'll say ask an authorized dealer, they will know. There is a rather complex formula to determine correct lead-lag but math isn't a strong point with me. asking my dealer is much easier.

 

[/pine]

No, it's not at all. Lead-Lag ratio is what impacted his front axle. If you have (x) sized (od) tires on the front, width means zip, you need (x) sized (od) tires on the rear. How it works and tread width or wheel offset has zip to do with it.

I know you are gonna as what is the correct lead-lag ratio with different tire sizes and I'll say ask an authorized dealer, they will know. There is a rather complex formula to determine correct lead-lag but math isn't a strong point with me. asking my dealer is much easier.

See my posts #5 and #7...they are both about what you are referring to as "lead lag"...it has everything to do with the R.C. (rolling circumference) of the front tires and the ratio to the size of the rear tires...!

 

[/pine]

...The difference in diameter that could result in drive-train damage amounts to a scant 0.22 to 0.23
inch, or just less than a quarter of an inch....

http://www.ndtirepartner.com/resources/Tire diameter sheet.pdf

 

[RickB]

This is 100% conjecture...no different than any of the other speculations...unless of course you have actual comprehensive analytical scientific engineering analysis...??

My extensive experience leads me to that conclusion, along with supplied static loaded radius info provided by the OP.
Whether anyone follows, I do not care.