D15 Tires
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=207403
Printed Date: 14 Jul 2025 at 6:15pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D15 Tires
Posted By: Travis2766
Subject: D15 Tires
Date Posted: 08 Jul 2025 at 10:44am
I have 14.9-26 tires on my D15 that are defiantly on barrowed time! Neighbor has a used set of 16.9-26 radials with some tread left off his 4wd that he'd give to me. The current rims are 12" or 13" width and I have no fluid in the tires. I realized the tires may bulge some due to the narrow rims, which I'm fine with. I'm hoping lowering the air pressure can help this issue some. I don't use the D15 for heavy work just pulling the sickle and hay rake. The info I've found online says this can be done but I've found little to no info about doing it with radial tires. Thoughts????
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190XT Series III, D17 Series IV, D15 Series II, All Crop 66 and a whole mess of equipment.
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Replies:
Posted By: DrAllis
Date Posted: 08 Jul 2025 at 3:06pm
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Go for it. You can try and run lower air pressure (like 8 to 10 lbs) to make them wear more evenly, but they're used tires, so the wear isn't that big of deal.
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Posted By: WF owner
Date Posted: 08 Jul 2025 at 7:08pm
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I bought a pair of 24" tires off the front of a 4wd tractor that I mounted on one of my D-10's. They ride terribly rough. Tread was worn unevenly.
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Posted By: Calvin Schmidt
Date Posted: 08 Jul 2025 at 8:10pm
I'm told that tires built for the front of a MFD tractor are built different then the same size tire intended for the rear of a smaller tractor. Likely why they are rough. 16.9 radials on a D-15 could be as low a 6 psi if they are tubeless
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Nothing is impossible if it is properly financed
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Posted By: DrAllis
Date Posted: 08 Jul 2025 at 10:34pm
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FWA tires are likely 10 or 12 ply sidewalls.
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Posted By: coggonobrien
Date Posted: 09 Jul 2025 at 11:55am
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unfortunately I think I ended up with the last pair of 16.9x26 firestone rear tires in the country. They do look better on a d15 then a 14.9
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Posted By: DrAllis
Date Posted: 09 Jul 2025 at 12:53pm
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One thing for sure with 16.9 x 26's on a D-15, it makes the drawbar higher, the PTO higher and the lift arms/snap coupler bell higher. On some implements, that doesn't seem to make much difference, but to other implements it does.
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Posted By: Travis2766
Date Posted: 09 Jul 2025 at 6:00pm
16.9’s are 2.4” taller than 14.9’s. Hence raising the drawbar about 1-1/4”, I can live with that.
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190XT Series III, D17 Series IV, D15 Series II, All Crop 66 and a whole mess of equipment.
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Posted By: Dave (Mid-MI)
Date Posted: 09 Jul 2025 at 8:00pm
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With a narrower rim the 16.9s will have a more rounded tread shape, so will probably be even taller.
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