8070 tire size
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=188296
Printed Date: 05 May 2024 at 10:46am
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Topic: 8070 tire size
Posted By: 2ndTime
Subject: 8070 tire size
Date Posted: 16 May 2022 at 8:07pm
I swear I performed a search before posting this. I'm pretty sure I've seen this info on here somewhere so I'm sorry if this is a repeat.  I purchased an 8070 FWA with 20.8x38 rear and 18.4x26 fronts. I purchased this tractor to pull a haylage baler and with this combination, the tractor rides nose high, puts the drawbar at a funky angle and too close to the ground. The fronts need to be replaced so now is the time to fix this situation. The rear rims are on their last go round as well (calcium chloride has eaten them up) so a change all the way around is not out of the question. Anybody have a better tire combination? Thanks for the help.
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Replies:
Posted By: Leon B MO
Date Posted: 16 May 2022 at 8:42pm
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You should have a 16.9 x 28 front tire on your tractor to match up to the 20.8 38 on the back. Right now your ratio is not correct. Leon B Mo ------------- Uncle always said "Fill the back of the shovel and the front will take care of itself". |
Posted By: Ron(AB)
Date Posted: 16 May 2022 at 8:59pm
20.8x42 on the back and leave that 18.4 on the front. It will be straight! Then mount 3 steps.  ------------- 405, 7000, 7050, 8050, 8070, L3, 2300 & 2600 disk |
Posted By: Ron(AB)
Date Posted: 16 May 2022 at 9:01pm
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Now you will have a good haying tractor... ------------- 405, 7000, 7050, 8050, 8070, L3, 2300 & 2600 disk |
Posted By: Lynn Marshall
Date Posted: 17 May 2022 at 8:07am
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Posted By: AC7060IL
Date Posted: 17 May 2022 at 8:30am
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Ron(AB) Thats a great looking 8070. |
Posted By: Ron(AB)
Date Posted: 17 May 2022 at 9:01am
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Note that radials are different heights. They are taller. I have bias front 10 ply and radial rears. If you look at Lynn's tire chart, radials are specifically noted with a "R". That's why my tire combination works ------------- 405, 7000, 7050, 8050, 8070, L3, 2300 & 2600 disk |
Posted By: soggybottomboy
Date Posted: 17 May 2022 at 7:59pm
| Our 8050 has 20.8R 38s on the back, and 18.4R-26 firestone fwa tires on the front. They are to big. They are slipping constantly, even with no load. Tractor sits with it's nose up like you said. They say 16.9s can be put on the same rims that the 18.4s are on, but we have not done that yet because the old tires are still going. Some have 14.9-28s on the front, and I think they are a little smaller in circumference than the 18.4-26s. Just my penny's worth. |
Posted By: ajl
Date Posted: 19 May 2022 at 12:52pm
| Mine has the 16.9 x 26 fronts with the 20.8 R38 on rear and is fairly level. But as Ron has pointed out, if you already have 18.4 fronts, get the 20.8 x R42 for the rear. I would do that. |
Posted By: 2ndTime
Date Posted: 09 Jul 2022 at 4:32pm
| Thanks Ron (AB), I like the idea of going up instead of down in height. This may be a stupid question, but I will need the 42" centers (I have a sliding axle) won't I? |
Posted By: 200Tom1
Date Posted: 09 Jul 2022 at 8:24pm
| Put fwd tires back on the front, otherwise you will be buying another set soon. |
Posted By: PaulB
Date Posted: 10 Jul 2022 at 6:47am
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Rims rotted from calcium solution: imagine that. As I've said many times to those that just have to fill tires with calcium solution, it's not IF the rims will rust out, but WHEN. ------------- If it was fun to pull in LOW gear, I could have a John Deere. If you can't make it GO... make it SHINY |
Posted By: Ron(AB)
Date Posted: 10 Jul 2022 at 1:15pm
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I used step up rims for the rears, so the centre is the same... ------------- 405, 7000, 7050, 8050, 8070, L3, 2300 & 2600 disk |
Posted By: 2ndTime
Date Posted: 11 Jul 2022 at 9:27am
| As you have probably figured out, I have no idea what I'm doing. Do you know of a wheel supplier that could help me out? I'm not familiar with a stepup rim. Thanks |
Posted By: Allis dave
Date Posted: 11 Jul 2022 at 10:06am
| You currently have 38" rims and 38" centers. A step up rim has a large "bulge" in the center so you can use your existing 38" centers. Sorry it's kind of a weird explanation. Your 38" rim has a shallow bulge where the wedge's go. A step up rim has a much deeper buldge. |
Posted By: Unit3
Date Posted: 11 Jul 2022 at 4:44pm
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Wold Rim and Wheel at Saint Ansgar, Iowa has 18.4 x 42’s spin out rims. I have pictures of them on my phone. I’ll try and‘s to get them posted. ------------- 2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C |