Tire options D12
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=205285
Printed Date: 16 Jul 2025 at 8:57pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Tire options D12
Posted By: AveryD12
Subject: Tire options D12
Date Posted: 05 Feb 2025 at 8:55am
Since repairing the front wheel on my D12 series 3 I have decided to replace the tires instead of reinstalling the old ones. In the post a few days ago about wheel repair options Gary posted a reply that included a link (thanks again) with info and a picture of a D12 series 3. I like the looks of the tires in the picture much better than the tires on my D12. I have been trying to find out the tire size…with no luck. I found a couple of pictures online of D12’s and the tire size is obviously different. I will try to post both pictures. If anyone can help identify the larger tire size … many thanks. Currently I have 5:00-15  
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Replies:
Posted By: DrAllis
Date Posted: 05 Feb 2025 at 9:20am
| The picture on the right are 14.9 x 24's, which was an OPTION on the later series. D-10-12. I just installed a set of 13.6 x 24's on my D-10 which replaced a pair of 11.2 x 24's. A big difference for sure. The larger tires may cause you to run the wheels out from the fender one setting (2 inches) to avoid contact. |
Posted By: AveryD12
Date Posted: 05 Feb 2025 at 10:19am
| Thanks Dr. But I was referring to the front tires. I have 14.9-24 on the rear but like the looks of the larger front tires |
Posted By: DrAllis
Date Posted: 05 Feb 2025 at 10:23am
| I'll have to look in my book when I get home. I'm thinking at 7.50 x 15 or 16 ?? |
Posted By: plummerscarin
Date Posted: 05 Feb 2025 at 11:42am
| I have similar GM rims on my WD project as seen on the right photo. Tire size is 7.50x15 |
Posted By: AveryD12
Date Posted: 05 Feb 2025 at 1:54pm
| I have 15” wheels. Would like to know if 7:50-15 would be ok before buying them. |
Posted By: Gary
Date Posted: 05 Feb 2025 at 2:15pm
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Avery My D-12 Series III has 14-9 X 24 on the Rear and 7:50-16 on the 'car style' Rims on the front. I believe that was the size available from the Factory. G |
Posted By: AveryD12
Date Posted: 05 Feb 2025 at 3:19pm
| I’ve read somewhere there were tire size options from the factory. All the specifics I can find about the front tire option sizes were the 5:00-15 and something smaller (I can’t remember the smaller size). I would like to go with the larger size but don’t want to buy something that won’t fit. |
Posted By: steve(ill)
Date Posted: 05 Feb 2025 at 3:23pm
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look at the clearance between your present tire and the vertical spindle tube.. That can vary depending on what RIMS you have and the tire size... going from 5 inch to 7.5 inch will put you about 1.25 inch CLOSER to the spindle tube..... Do you have enough clearance ?
------------- Like them all, but love the "B"s. |
Posted By: DrAllis
Date Posted: 05 Feb 2025 at 3:27pm
| A good tire man can tell you what WIDTH of rim you need for a 6:50 x 15 or 7:50 x 15 tire to go on your existing wheel. You should be able to measure the rim width with a piece of wire bending it to measure like a calipers and remember if it measures 4 1/4" outside it is a 4 inch rim as you are measuring from the outside. |
Posted By: AveryD12
Date Posted: 05 Feb 2025 at 4:22pm
| Thanks. I’m about 75 miles from the tractor now. Will be back home first part of next week. I will check it out then |
Posted By: Gary
Date Posted: 05 Feb 2025 at 4:48pm
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Avery .There were a large number of front Tire sizes for the D-10 and D-12. Here are most of them: 4.00 X 15, 5.00 X 15, 5.50 X 15, 6.40 X 15, 7.60 X 15 5.50 X 16, 6.00 X 16. Of course every body knows you have to use the appropriate Rim ( similar to what would have been supplied by the Factory EG. the Car Style Rim ) That way the Tire won't rub on the Steering Spindle. G |
Posted By: DrAllis
Date Posted: 05 Feb 2025 at 6:59pm
| I looked at my literature and they call out a 7:60 x 15 for that balloon type tire. The wheel offset has to be different I guess to keep the tire from rubbing on the spindle. |
Posted By: steve(ill)
Date Posted: 05 Feb 2025 at 7:26pm
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i think he is trying to get the BIGGEST tire he can, and use the 15 inch RIMS that he has now... ------------- Like them all, but love the "B"s. |
Posted By: Gary
Date Posted: 05 Feb 2025 at 8:09pm
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Here is a link to a similar Front Wheel discussion on this Forum. PaulB mentions an Old Chrysler 15" is a good match. G https://www.allischalmers.com/forum/wanted-d10-d12-series-3-front-rims_topic202289.html" rel="nofollow - https://www.allischalmers.com/forum/wanted-d10-d12-series-3-front-rims_topic202289.html |
Posted By: bozrae
Date Posted: 07 Feb 2025 at 7:57am
Here's a pic for a D12 series 3 operators manual. ------------- D15D, D17G, 170G, 175D, and two 5050FWA |
Posted By: AveryD12
Date Posted: 07 Feb 2025 at 8:45am
| Thanks everyone. After seeing the info I looked at AGCO site for D12….. I guess I should have started there. I see the larger tire size calls for a wider wheel but also found on the AGCO parts site for D12 calls for a different hub for the wider wheel. I don’t want to get into all that change just for the looks of a bigger tire. Like Steve said just looking for a bigger tire that would work with the wheel I have and not rub the spindle. |
Posted By: steve(ill)
Date Posted: 07 Feb 2025 at 12:18pm
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you have a 5 x 15 tire now... I would think you could go to 5.5 or 6 inch without problems..( if such a size is even available)... 7.5 might be a little big for the rim..
------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 07 Feb 2025 at 12:32pm
multi rib, not 3 rib ------------- Like them all, but love the "B"s. |
Posted By: AveryD12
Date Posted: 07 Feb 2025 at 1:37pm
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I’ll ask at the tire shop before I buy. I’m not even sure what the next available tire size is above 5:00-15 Thanks Avery |