CA Tire Size Question
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=194094
Printed Date: 18 Jul 2025 at 3:29pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: CA Tire Size Question
Posted By: dfwallis
Subject: CA Tire Size Question
Date 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. |
Replies:
Posted By: DrAllis
Date 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. |
Posted By: TomC
Date Posted: 15 Mar 2023 at 8:39pm
| I've got 12.4 X 24s on my CA on 10x24 rims, they work fine |
Posted By: dfwallis
Date Posted: 15 Mar 2023 at 9:08pm
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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TomC wrote:Posted By: HudCo
Date Posted: 15 Mar 2023 at 10:52pm
| 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 |
Posted By: dfwallis
Date Posted: 16 Mar 2023 at 7:52am
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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Posted By: DrAllis
Date Posted: 16 Mar 2023 at 8:19am
| Bouncing ?? sounds like no fluid in the tires. Won't pull nothing and bounce like a basketball. |
Posted By: dfwallis
Date Posted: 16 Mar 2023 at 1:06pm
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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Posted By: dfwallis
Date Posted: 16 Mar 2023 at 8:05pm
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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Posted By: dfwallis
Date Posted: 16 Mar 2023 at 8:06pm
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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