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CA Tire Size Question
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dfwallis View Drop Down
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Joined: 09 Mar 2023
Location: DFW
Points: 676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Topic: CA Tire Size Question
    Posted: 15 Mar 2023 at 8:30pm
CA service manual says correct tire is 10x24.  Actual tire is 11x24 (i.e. old an crumbly).  What is it likely say about tire and rim size in current nomenclature?  Is this an 11.2x24 or 12.6x24? likely on a ten inch rim or an 11 inch rim?  I guess most importantly what's it say about the tire size.  I'll adjust the rim I get if needed.  I researched some "nomenclature conversion" web sites but several made conflicting statements.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21426 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2023 at 8:32pm
10 x 24 (before 1957) turned into 11.2 x 24.      11 x 24 (before 1957) became 12.4 x 24.
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TomC View Drop Down
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Joined: 24 Nov 2017
Location: Hillsboro, MO
Points: 1549 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TomC Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2023 at 8:39pm
I've got 12.4 X 24s on my CA on 10x24 rims, they work fine
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dfwallis View Drop Down
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Originally posted by TomC TomC wrote:

I've got 12.4 X 24s on my CA on 10x24 rims, they work fine

I hope to increase 1 size due to complaints from my dad about getting stuck a lot.  So, I guess I'll consider 12 inch rims and 13.6 for the new configuration.  I don't find 11 inch rims, only 10 and 12.
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Joined: 29 Jan 2013
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i put two brand new fire stone super all tracton 23 * 12.6 x 24 on new 10 inch rims on my c last summer  i cant believe how much better than the old mismatched 11.2  between the hight  and width i think they look better any ways
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Joined: 09 Mar 2023
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Points: 676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2023 at 7:52am
Originally posted by HudCo HudCo wrote:

i put two brand new fire stone super all tracton 23 * 12.6 x 24 on new 10 inch rims on my c last summer  i cant believe how much better than the old mismatched 11.2  between the hight  and width i think they look better any ways

I'm pretty sure these 11x24s are matched US Royals.  Grandpa was pretty particular.  But I remember driving it max speed down the road in the 60s and there was a serious bouncing up and down from side to side :)
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Points: 21426 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2023 at 8:19am
Bouncing ?? sounds like no fluid in the tires. Won't pull nothing and bounce like a basketball.
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dfwallis View Drop Down
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Joined: 09 Mar 2023
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Points: 676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2023 at 1:06pm
Originally posted by dfwallis dfwallis wrote:

CA service manual says correct tire is 10x24.  Actual tire is 11x24 (i.e. old an crumbly).  What is it likely say about tire and rim size in current nomenclature?  Is this an 11.2x24 or 12.6x24? likely on a ten inch rim or an 11 inch rim?  I guess most importantly what's it say about the tire size.  I'll adjust the rim I get if needed.  I researched some "nomenclature conversion" web sites but several made conflicting statements.

My initial starter purchase content: 

Two Front Tires and Tubes
Two Rear Tubes
Primer (gray)
Manifold and Gaskets
Wheel Spray Paint
Persian Orange Paint
Muffler and Rain Cap
Two 12 Inch Rims
Two 13.6x24 Tires (Titan Traction Lug R-1)

That's before we even get to the motor...there goes my tax refund :(
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dfwallis View Drop Down
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Points: 676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2023 at 8:05pm
Originally posted by DrAllis DrAllis wrote:

Bouncing ?? sounds like no fluid in the tires. Won't pull nothing and bounce like a basketball.

Possible, but I doubt it, grandpa was really particular and by the book.  Had every manual for every implement neatly cataloged and followed the instructions to the letter.  He was a machinist at Cummins, if he had to do or make something, it was top notch quality.
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Joined: 09 Mar 2023
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Points: 676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2023 at 8:06pm
Originally posted by HudCo HudCo wrote:

i put two brand new fire stone super all tracton 23 * 12.6 x 24 on new 10 inch rims on my c last summer  i cant believe how much better than the old mismatched 11.2  between the hight  and width i think they look better any ways

I tried and tried to get some firestones, but every place I tried was out of stock :(  It's like there's a run on tires (that I want)...:(
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