Picture

[john2189]

Does anyone have a picture of an f cub with the big loboy turf tires ? I did a search but nothing came up.

John

[Barnyard]

[Lt.Mike]

Looks like a busted axle waiting to happen.

[john2189]

Thanks Barnyard!

[john2189]

Looks like a busted axle waiting to happen.

Why would that break an axle? Other than the housing, isn’t the final drives the same?

[Dusty B]

Are those 11.2 or even bigger..?

[outdoors4evr]

Hmmm... Basically the same final drive turned on the numbered lowboy. Less traction. Smaller rim and less weight (no wheel weights available).
Why would this be harder on the axle?

[john2189]

Hmmm... Basically the same final drive turned on the numbered lowboy. Less traction. Smaller rim and less weight (no wheel weights available).
Why would this be harder on the axle?

I agree, you can put all the weight you can in the tire, such as calcium or as many wheel weights and that won’t effect the strain on the axel or wheel bearings. Now if you could attach the same weight to the drawbar or frame, that’s a different story.
John

[radioguy41]

By moving that big tire outward like that (offset) you increase what we used to call the unsprung weight so instead of the wheel and tire putting vertical loads on the axle and axle bearing it is now putting torsional loads on the axle and torsional loads can lead to axle failure and certainly axle bearing failure. In that photo above I would also expect the center disc of the wheels to eventually crack and fail because the bolt pattern is concentrated close to the center rather than spread out closer to the rim for that size tire.

[Lt.Mike]

Looks like a busted axle waiting to happen.

Why would that break an axle? Other than the housing, isn’t the final drives the same?

[by radioguy41 » Tue Jan 28, 2020 2:00 pm

By moving that big tire outward like that (offset) you increase what we used to call the unsprung weight so instead of the wheel and tire putting vertical loads on the axle and axle bearing it is now putting torsional loads on the axle and torsional loads can lead to axle failure and certainly axle bearing failure. In that photo above I would also expect the center disc of the wheels to eventually crack and fail because the bolt pattern is concentrated close to the center rather than spread out closer to the rim for that size tire.

This /\
He nailed it

[Jim Becker]

By moving that big tire outward like that (offset) you increase . . .

Any more so than when the original wheels are set for a 56" track? Without measuring, I don't think so.

. . . In that photo above I would also expect the center disc of the wheels to eventually crack and fail because the bolt pattern is concentrated close to the center rather than spread out closer to the rim for that size tire.

The same bolt pattern as the center disk on any Cub. Unclear why it becomes a problem in this situation.

[john2189]

I don’t get it...If they work on a numbered loboy, why can’t they work on an f cub?

[Eugene]

I don’t get it...If they work on a numbered loboy, why can’t they work on an f cub?

The same bolt pattern as the center disk on any Cub. Unclear why it becomes a problem in this situation.

Not a problem. The load on the axle, wheel, differential, bearings would be less than a Standard Cub with 300 lbs. of weight on each tire, a fill of calcium chloride, and pulling a heavy load.

[Oldgoat]

'what ever you say it appears to be running and looks like it been running for some time. And it looks good too.

[radioguy41]

By moving that big tire outward like that (offset) you increase . . .

Any more so than when the original wheels are set for a 56" track? Without measuring, I don't think so.

There is a lot more outboard weight and hence leverage on that one. Look how deep the rim is, well beyond the Cub 56" setting.

. . . In that photo above I would also expect the center disc of the wheels to eventually crack and fail because the bolt pattern is concentrated close to the center rather than spread out closer to the rim for that size tire.

The same bolt pattern as the center disk on any Cub. Unclear why it becomes a problem in this situation.

There is a lot more outboard weight and hence leverage on that one that can cause the center disc to flex beyond design capacity.