24.5 x 32 Tires for 7000lb Mod Farm Class  
       
      Printed From: Unofficial Allis
        Category:  Other Topics
       Forum Name:  Pulling Forum
       Forum Description:  Forum dedicated to Tractor and Garden Pulling
       URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=150545
       Printed Date: 04 Nov 2025 at 5:21am Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
      
 
  
      Topic: 24.5 x 32 Tires for 7000lb Mod Farm Class
       
      Posted By: KevinON
       Subject: 24.5 x 32 Tires for 7000lb Mod Farm Class
       Date Posted: 17 May 2018 at 8:27am
       
      
        
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I am building a 190XT for a Super Light 7000lb Mod Farm Class.  Cube limit is 330 with a 2.3 charger and 3100rpms.  Max tire size is 18.4x38, but I own a set of 24.5 x 32 tires.  I always was a fan of the 38's and thought they were a better all around tire, but what are your thoughts on the 24.5's???  Thanks for the input!
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  Replies: 
       
      Posted By: injpumpEd
       
      Date Posted: 17 May 2018 at 1:00pm
       
      
        
          
	
Big tires take more HP to turn, in these lower hp classes. 
  ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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      Posted By: KevinON
       
      Date Posted: 17 May 2018 at 1:08pm
       
      
        
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That is true.  I'm not going to get rid of them, though.  I may step up to light pro stock in the future, so they would work well there.  Just wondering if the footprint is much bigger than on the 18.4x38?
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      Posted By: ACFarmer
       
      Date Posted: 18 May 2018 at 8:21am
       
      
        
          
	
Foot print is closer to a 20.8x38. 
  ------------- Making a living farming with and working on Allis Equipment
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      Posted By: KevinON
       
      Date Posted: 18 May 2018 at 8:34am
       
      
        
       
      
      Posted By: PaulB
       
      Date Posted: 21 May 2018 at 12:24am
       
      
        
          
	
If your class has a limit of an 18.4X38, why are you even asking about 24.5X32s😳
  ------------- If it was fun to pull in LOW gear, I could have a John Deere.  Real pullers don't have speed limits. If you can't make it GO... make it SHINY
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      Posted By: DrAllis
       
      Date Posted: 21 May 2018 at 7:12am
       
      
        
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As per the Firestone tire footprint chart, a 20.8 x 38 has a flat plate area of 380 square inches and a 24.5 x 32 has 430 square inches.  Looks to me like more than 10% difference between the two tires.
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      Posted By: ACFarmer
       
      Date Posted: 21 May 2018 at 7:45pm
       
      
        
          
	
They aren't exactly the same, but they are close. Any given night a tractor on 20.8 can get by a tractor on 24.5 in the hot farm class around here. Then factor in the new cast just for pulling 20.8s that are out now and they get even closer on footprint.
  ------------- Making a living farming with and working on Allis Equipment
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