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Is there some truth to this?

J

Jziemer

Member
The other day I was talking to a guy and he claims that if your
international tractor has bigger duals than the inside tire it will
turn on the headlands a lot easier and you will be able to pull
bigger equipment. Is there any truth to this?
 
No it is a great way to break axles.
On hard ground, the farther the contact wheels are from the steering tires, the wider the turn.
In soft ground, the wider the deepest penetration the more they try to turn the tractor despite where the front wheels are pointing. Jim
 
May turning easier 'empty',but would make no difference pulling a load.As Jim says"good way to break axles".If you have differing size tires,run the bigger inside,the smaller out.
 
Keep in mind that your inside tire is still supposed to be the main driving force. Never want the outer tire larger than inner. If tires are same size it is a good idea to run a few pounds less air in outside tire. I have seen way too many dual hubs give problems due to slightly over sized outer tire or over inflated or just a identical tire with more tread making it over sized.
 
Ok and I'm not 100% sure if he was talking about band duals or hub duals but I'm assuming that the same would be true for band duals?
 
(quoted from post at 23:07:07 01/06/13) Ok and I'm not 100% sure if he was talking about band duals or hub duals but I'm assuming that the same would be true for band duals?
Click to expand...

The same rules apply, whether axle mount or band style.
 
Maybe some truth to it if your right side tires were larger than your left side tires and you were making left hand turns. That technically would make your right side tires the "outer tires" in the turning radius, however its feasability is non-existant.
 
Ok that's what I was kinda thinking to. I was wanting to buy duals for my 986 which has 18.4 38s and the duals he was trying to sell we're 20.4-38s and I figured I better get some more opinions on this
 
(quoted from post at 14:04:27 01/06/13) Keep in mind that your inside tire is still supposed to be the main driving force. Never want the outer tire larger than inner. If tires are same size it is a good idea to run a few pounds less air in outside tire. I have seen way too many dual hubs give problems due to slightly over sized outer tire or over inflated or just a identical tire with more tread making it over sized.
Click to expand...

The Deere manuals all call for that right in the book. Can't speak for a CIH manual because I have never read one.
 
I guess the only reason I thought it would possibly work was I have seen tractors wit 20.8-38 tires inside and 18.4-38 tires as duals so I was thinking mane it would work with the 18.4-38 tires inside and the 20.8-38 as the duals. Thanks for the help
 
If you have larger tires on one side than the other this will make your spider gears in you differential constantly walk even when driving in a straight line, because the smaller tires will be making more revolutions!
 
If you dont mind replacing broken axle bolts every other day. I am talking about the old type that clamp on the rim. You get too much pressure from that outer dual and you will break the bolt that hold the wheels to the axle. Least we did on our 706 and 766.

Gene
 
As long as the diameter is the same it doesn't matter where the wider tire is. But put a larger diameter tire outside of a smaller diameter hard parts will break.
 
Always match duals with same tire and best to have equal air pressure or less in outer ones.There are a few tires that match in height which work and some tires the same size can be taller.I sell a few pulling tires and BFG are several inches taller than GoodYears.Especially older tractor in the early 60s werent made for duals.M&W introduced their duals when 4010s and 806s were popular.I have seen early tractors with two similar wheels dont know if that was an option.Today most all bigger MFD tractors have duals front and rear.
 
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