W-30 rear tires ?

banjoman09

Well-known Member
Just noticed my W-30 has a 16.9 x 28 on one side; and a 14 x 28 on the other; can you tell me which is right? Thanks.
 
The tire that is a 14X28 is the old tire number system and the 16.9X28 is the new number system. Both are In fact the same size tire. I ran into the same thing this summer on my Oliver S88 and it had a bad 14X38 on it and the new tire I replaced it with is a 16.9X38 because back years ago they changed the way tires where numbered
 
You know me I am always happy to help if and when I can. I saw who posted this and figured I would at least look at your post. If you had asked about the tractor it self I would not have answered your post LOL
 
Hey - dont be that way! I thought we were "good" ? I will try not to use "restore" anymore...better? Thanks.
 
Well in this area we almost never see a W-30 so it is a tractor that I know very little of since I do not even remember seeing one even at a show
 
I did not say that. From what I understand and I could be wrong the W stands for Wheatland and well where I live there is no wheat land. I still remember when I lived in Winfield KS there was a lot of wheat fields and a Wheatland tractor would have been common in that area
 
There is a difference between the 14x28 and the 16.9x28. The 16.9x28 inch put 30 square inches more rubber on ground over 14x28's. It's the same with your 14x38's verses 16.9x38's. The 16.9x38's put 52 square inches more rubber on the ground over the 14x38's.
 
The W on the W30 through the W9 tractors stood for the standard series tractors of Mc-cormick Deering.
 
There is a pullers chart that tells the square inches of rubber on ground for the different sizes and the 16.9x38 puts more square inches of rubber on the ground than a a 14x38 tire.
 
There are several charts out there on how many square inches of rubber is put on ground. Firestones chart is different than the NTPA chart but Firestone bases theirs on running on plowed gruond and NTPA bases theirs on a hard clay track. A 14.x38 rear tractor tire has a larger square inch foot print than a 15.5x38. The 15.5x38 is actually small in diameter than a the 14.9x38.
 

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