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Gerald J. 
Orange Level
Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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 Posted: 03 Jan 2016 at 2:23pm |
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The Titan Goodyear ag tire handbook recommends W16A or DD!6 for 18.4-34 bias and approves W15L. For 20.8-38 it recommends W18A, DD18 and approves DW18A.
For radial 18.4R38 it recommends W16A, and approves DD16, W15A, and W15L.
For radial 20.8R38 it recommends W18A and approves DD18, and DW18A.
A bias ply 20.8 on a 16" rim will be larger rolling diameter than on an 18" rim. Radial with its belt may not be larger but the sidewalls will be more bulged and probable not like the extra flexing for a long time.
So that book says 20.8 shouldn't be on 16 inch wide rims. Other tire makers may have a different opinion.
Gerald J.
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Unit3
Orange Level
Joined: 17 Oct 2009
Location: NC Iowa
Points: 5532
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Posted: 03 Jan 2016 at 8:24pm |
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ILGleaner, next time you have a camera around your 8070, snap a picture or two of your 42's please.
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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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Joe(IA)
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Joined: 12 Sep 2009
Location: United States
Points: 99
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Posted: 03 Jan 2016 at 9:16pm |
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Unit 3 i have 18.4x42 on my 8050 two wheel drive just a mile from you. I bought it with butt ugly step up rims as you say, but in my opinion look pretty natural compared to some you see!
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Unit3
Orange Level
Joined: 17 Oct 2009
Location: NC Iowa
Points: 5532
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Posted: 03 Jan 2016 at 9:28pm |
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Well Joe, I can't do better then that. LOL. When did you get an 8050. I only see the 7000 series when I drive by.
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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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Joe(IA)
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Joined: 12 Sep 2009
Location: United States
Points: 99
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Posted: 03 Jan 2016 at 9:46pm |
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I told you I bought a 8050 with 3700 hours when we were waiting in line at Maxyield. Its not at the home place. In my shed west of you at my hog site. Even tho my brother runs a case store you still can't get the orange out of your blood.
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Joe(IA)
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Joined: 12 Sep 2009
Location: United States
Points: 99
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Posted: 03 Jan 2016 at 9:47pm |
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Im sorry east of you
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ILGLEANER
Orange Level Access
Joined: 13 Sep 2009
Location: Willow Hill,ILL
Points: 6448
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Posted: 03 Jan 2016 at 11:46pm |
 Unit3 wrote:
ILGleaner, next time you have a camera around your 8070, snap a picture or two of your 42's please. |
Yes I will. I will sell you the cast centers and rims and tires and throw in the tractor for free !!!! IG
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Education doesn't make you smart, it makes you educated.
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Unit3
Orange Level
Joined: 17 Oct 2009
Location: NC Iowa
Points: 5532
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Posted: 04 Jan 2016 at 4:34pm |
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Well, I would, but, ahhh, well, you see, I, ahhh, well, ----- its its its the ahhh whole money thing.
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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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michiganmarty
Silver Level
Joined: 19 Feb 2012
Location: central mi
Points: 69
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Posted: 04 Jan 2016 at 5:34pm |
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So, does anybody know what a difference the no spin axle would make with ratios. I didn't see this chart when I put the 14.9 with the 18.4x42. There wasn't a lot of difference between the 20.8x38 and the 42's, and I see a lot of 20.8's with 14.9's. I think the manufactuer has a lot to do with it also.
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