38s vs 34s
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Forum Name: Pulling Forum
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=117734
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Topic: 38s vs 34s
Posted By: Bob C IL
Subject: 38s vs 34s
Date Posted: 18 Jan 2016 at 7:27pm
| Anyone off hand know the circumference difference between a 18.4x38 vs 18.4x34? |
Replies:
Posted By: den/southern illinoi
Date Posted: 18 Jan 2016 at 8:39pm
|
Since I do not know the actual diameter of the two tires, I cannot figure the difference. At the outside of the rim it is 12.56 inches difference. You take the diameter times (multiply) by 3.14. At least I think that is what my math teacher taught me. Den ------------- Own 4 wheel 20, 2-5015, 5020 and associated equipment and 2 electric forklifts. |
Posted By: Bob C IL
Date Posted: 18 Jan 2016 at 8:55pm
| I can do the 38s but no 34s available for scientific research!! |
Posted By: ILGLEANER
Date Posted: 18 Jan 2016 at 9:53pm
|
Bob are you thinking 34s to change your gear ratio to the ground ????? IG ------------- Education doesn't make you smart, it makes you educated. |
Posted By: patrickmull
Date Posted: 19 Jan 2016 at 1:22am
| setting side by side 18.4 x 34 on 20" wheels firestone f/r are the same height as my 15.5 x 38 f/r on 16" wheels |
Posted By: bradley6874
Date Posted: 19 Jan 2016 at 11:44am
What bradn tire if there fireston google firestone tire data ar callthe dealer they can tell ya I walked in and started asking quetions he got tired of looking stuff up and gave me an old catoulg and said take it find what you want just leave ealone  ------------- You can wash the dirt off the body but you can’t wash the farmer out of the heart and soul |
Posted By: O.P.S. Heads
Date Posted: 19 Jan 2016 at 12:39pm
|
How about if you look at speed charts for the same tractor at the same RPM. One speed chart with 34's and the other with 38's. Figure the percentage difference of speed and use that. Or use these: http://commercial.firestone.com/content/dam/bcs-sites/firestone/PDF/RCI.pdf http://www.petestirestore.com/184x34-Firestone-Super-All-Traction-II-Tractor-Tire-8-Ply-TL_p_7149.html |
Posted By: Bob C IL
Date Posted: 19 Jan 2016 at 1:52pm
| Thanks for the advice guys! all I needed was a measurement last night. My son and a buddy borrowed a calculator and think we have it figured out. My sons best idea was to buy a red or green tractor cause they have all the fancy store bought parts. Well that won't work with my situation because of a 8 to 5 job, wife, and rasing a granddaughter. And no farm ground to sell ( shouldna said that ). Oh well if all else fails it's one impressive lawn chair to drink beer out of. Later! |