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What tire size do I have?

H

HappyJack

Member
I'm looking for tire chains for my tractor and pricing out future replacement of the tires (the previous owner cut them up somewhat, resulting in a great selling price to me....). Tractor Data says the IH 444 (364) should have 12.4-32 tires on it. The tires on my tractor say 16.9-28/14-28.

My research says I have 16.9 inch bias ply wide tires on 28 inch rims. But I'm confused what the second series of numbers means?

Anybody familiar with this?


Scotty
 
The 16.9X28 is the new tire sizing numbers and the 14X28 is the old style of tire sizing so you have a 16.9X28 tire
 
The second size is the old(14x28) designation.It corresponds with the new/current sizes(16.9x28). Most likely omeone has put oversize tires on it. Either they simply mounted big tires on the standard rims,or they put on wide rims as well. Measure the rim's width to get the correct size. One size over is OK,not 2 or 3 sizes too big.
 

Thanks for the replies - it appears that 14-28 was the measurement convention between 1938 and 1960 (thanks Miller Tire).

I also dug up the specs for the tires I have (16.9-28) and the ones that Tractor Data says should be on it (12.4-32). The rolling circumference is the same for both but my tires are wider. They seem to fit the rims correctly, so can I presume that a previous owner swapped rims and tires for something wider? Is there an issue with having wider tires (that fit their rims)?

Thanks again
 
No issues with wider tires on correct rims. However the bigger (16.9) tires are taller than the smaller (12.4) tires. Your ground speed will be increased some with bigger tires. But no issues there either.
 

14.9-28 were the common size new on the (UK) 444 here.

32" sounds like a UK market size.
 
a person never knows how many time the tire could have been changed. 14x28 is the old 16.9 x28. I don't think that newer tires would have such a marking. its only 16.9x 28 nowadays. look for 16.9x 28 chains.
 
(quoted from post at 19:00:44 03/22/19) a person never knows how many time the tire could have been changed. 14x28 is the old 16.9 x28. I don't think that newer tires would have such a marking. its only 16.9x 28 nowadays. look for 16.9x 28 chains.
Click to expand...

Thanks Rusted. The reason I was confused is because the writing on the tire is exactly as I wrote it. Maybe the tires were manufactured soon after the format change.......
 
Yes the 16.9 is a taller tire but take into account they are on a 28 inch certainly rim and not a 32 like the 12.4 he mentioned so my guess is height would be close and without the two tires mounted and inflated and standing side by side it may be hard to know the difference.
 
16.9x28 was an optional size for your tractor. Nothing odd to
worry about. Buy your chains, make sure you have enough
clearence to run them.
 
Tractordata is not the end-all, be-all of tractor data. It's better than nothing but is incomplete, and sometimes wrong. Take everything you read there with a grain of salt.

Your 16.9x28 tires have the same loaded radius and circumference as 13.6x32's, but are wider and give you better traction and flotation. Plus, good luck finding any 13.6x32's for sale, or 32" tractor tires in general. They're an oddball size like 40", not used on many machines, and are obsolete.
 
(quoted from post at 05:13:15 03/28/19) Tractordata is not the end-all, be-all of tractor data. It's better than nothing but is incomplete, and sometimes wrong. Take everything you read there with a grain of salt.

Your 16.9x28 tires have the same loaded radius and circumference as 13.6x32's, but are wider and give you better traction and flotation. Plus, good luck finding any 13.6x32's for sale, or 32" tractor tires in general. They're an oddball size like 40", not used on many machines, and are obsolete.
Click to expand...

Thanks. That's what I was finding, that's why this forum is such a great place to come to......
 
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