What are these tires and where can I get them

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It seems that I heard you are not suppose to use liquid ballast in a radial tire. Does anyone know about that for sure?

MarkV[/QUOTEI personally never heard of that. That would be the complete knife in the chest for this plan if I hadn't already decided against it. I would definitely need the ballast

 

[Chilly807]

Carlisle makes their Farm Specialist R1 tires in 7-16 sizes. I've had 2 sets on the front of my L3400 Kubota. The price is right and they wear ok. I'll say this, though.. run the max inflation pressure or they can delaminate if you do a lot of heavy loader work. I think that's what killed the first set, which Carlisle replaced. I put tubes in the second set, just in case.

Sean

 

[Charolais]

It seems that I heard you are not suppose to use liquid ballast in a radial tire. Does anyone know about that for sure?

MarkV[/QUOTEI personally never heard of that. That would be the complete knife in the chest for this plan if I hadn't already decided against it. I would definitely need the ballast

You can use liquid ballast in radial tires. The reason some say not to is because it will change the way the tire rides. Some info I read said to use up to 40% ballast in the tire and the ride wouldn't change. I did that until I added a loader and then removed the ballast from the fronts to the rear and finished filling the rears up to the top of the rim/ valve stem at top. I see little difference in the ride and the Deutz will run 30 mph. The extra weight sure helped when operating the loader. I use this loader mostly for fire wood and am in logging roads picking out of piles left by the wood chipper. So far no cuts or punctures.

 

[Zebrafive]

Thanks Zebra. If you don't mind, I need to put this in usable terms for my less than stellar brain. Lets say the backs have a rolling circumference of 130". What range do the fronts need to be in? Currently on the tractor there is are 11.2x24 rears that are 43.6" tall and 7x16 fronts that are 29.8" tall. The fronts have a rolling circumference of 89". What % is the current lead lag of this set up and how do you figure it?

Without knowing the axle ratios and the drive ratio of the fwd ouput there is no way to calculate your lead/lag from just the tires sizes. You need to make test runs and tire rotation counts.

Firestones AG website has instructions for determining the lead/lag of any tractor. It involves marking the tires and making measured (by count rear tire rotation) runs in two wheel drive and four wheel drive then dividing the number of rotations the fronts made in four wheel drive by the number of rotations the fronts made in two wheel drive.

If you have lead (fronts turning a faster travel speed than the rears) the fronts will have turned more revolutions in four wheel drive than in two wheel drive.

If you take your rear rolling curcumference of 130" x 10 revolutions = 1300" then time 2% (1.02) = 1326" divided by your front tire rolling circumference, 89" = 14.9 rotations for the rear tires 10 revolutions.
By changing the percent multipler from 1-5% you could calculate the range for the number of front tire rotations for 10 rear tire rotations that would be OK.
You would be better off marking the tires and doing the test runs and tire revolution counts rather than just using the tire circumferences.

 

[Zebrafive]

It seems that I heard you are not suppose to use liquid ballast in a radial tire. Does anyone know about that for sure?

MarkV

My JD 6415 has radials. The rears were loaded by the former owner so I do not know the %. I have heard they will not ride as well as unloaded radials, but I have nothing to compare to.

 

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Without knowing the axle ratios and the drive ratio of the fwd ouput there is no way to calculate your lead/lag from just the tires sizes. You need to make test runs and tire rotation counts.

Firestones AG website has instructions for determining the lead/lag of any tractor. It involves marking the tires and making measured (by count rear tire rotation) runs in two wheel drive and four wheel drive then dividing the number of rotations the fronts made in four wheel drive by the number of rotations the fronts made in two wheel drive.

If you have lead (fronts turning a faster travel speed than the rears) the fronts will have turned more revolutions in four wheel drive than in two wheel drive.

If you take your rear rolling curcumference of 130" x 10 revolutions = 1300" then time 2% (1.02) = 1326" divided by your front tire rolling circumference, 89" = 14.9 rotations for the rear tires 10 revolutions.
By changing the percent multipler from 1-5% you could calculate the range for the number of front tire rotations for 10 rear tire rotations that would be OK.
You would be better off marking the tires and doing the test runs and tire revolution counts rather than just using the tire circumferences.

Thanks again Zebra. I did find this stuff out later after your first post about lead lag. Much appreciated.

 

[Mace Canute]

You can use liquid ballast in radial tires. The reason some say not to is because it will change the way the tire rides. Some info I read said to use up to 40% ballast in the tire and the ride wouldn't change. I did that until I added a loader and then removed the ballast from the fronts to the rear and finished filling the rears up to the top of the rim/ valve stem at top. I see little difference in the ride and the Deutz will run 30 mph. The extra weight sure helped when operating the loader. I use this loader mostly for fire wood and am in logging roads picking out of piles left by the wood chipper. So far no cuts or punctures.

I read in some ag publication that for the best traction when pulling ground engaging equipment, a maximum fill of 45% with radials gave the best result.

 

[MHarryE]

We don't have ballast in any of our radial equipped tractors but that is just our preference. Traction is better with the radials and we live with that. John Deere goes into a lot of detail of how to stop power hop. One of the suggestions is to vary liquid ballast in the tires - ballast rears and not fronts, ballast fronts and not rears, varying ballast amounts. All of these are after the easier things like varying tire pressure. So liquid ballast in the tires is definitely not a problem.