SA rear tire sizes and benefits

Farmall Super A, AV, 100, 130, & 140 1939 - 1973

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lwhiway
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SA rear tire sizes and benefits

Postby lwhiway » Mon Jan 15, 2018 12:05 pm

On the SA that I have owned since the late 50's it came with 9x24's on the rear.

I've seen and heard of others putting 11.5x24's on the rear and was wondering just how much of a difference this might actually make for the tractor rather than just for looks as most prefer.

I do know that when the tractor is plowing and pulling a bit of slippage is normal running the smaller sized tire, but would this make that big of a difference with respect to the governor abilities?

Just curious if anyone is using the larger sizes and getting good results in actual use in the field etc.?

LW

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Re: SA rear tire sizes and benefits

Postby Super A » Mon Jan 15, 2018 1:02 pm

The majority of Super As were sold new with 11.2-24 rear tires (old size was 10-24) in my area. I think sometimes tire size was a regional thing. I believe IH recommended this size for using the A-295 two bottom plow. To me it is the best all-around, general use size.

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Re: SA rear tire sizes and benefits

Postby twotone » Mon Jan 15, 2018 3:37 pm

I have 12.4x24 on the rear of my SA. I haven't used it in 5 years, but I used to pull a 8 foot disc with it and it worked well.
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lwhiway
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Tractors Owned: 1 69 Cub, 3 1951 SA's and tooling for all 4
Location: Indian Bayou, La. and Lake Charles, La.

Re: SA rear tire sizes and benefits

Postby lwhiway » Mon Jan 15, 2018 3:45 pm

Ok then. That settles my issues with rear tire size nicely. I'll probably look at 12's and 11's both and make a decision.

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Re: SA rear tire sizes and benefits

Postby twotone » Mon Jan 15, 2018 5:01 pm

This is what the 12.4's look like
Attachments
IMG_0551.JPG
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Re: SA rear tire sizes and benefits

Postby Super A » Mon Jan 15, 2018 7:57 pm

12.4s were more common on the 140s. IMO they look too big on a Super A, but that's strictly opinion.

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Re: SA rear tire sizes and benefits

Postby Lt.Mike » Tue Jan 16, 2018 10:01 am

Over the years I had picked up two A’s, one with 9.5s and the other had 8.3s. The 9.5s look and work ok on the A but 8.3s belong on a Cub not an A IMO although the first A’s I believe came with them. On my working A I mounted 11.2s and they do provide added traction and float better over the soft ground in the woods behind my home. I also like the look of them.
That tractor presently has 4.00x15 fronts which seem small / mismatched visually with the larger rears. Being thinner they also cause performance problems on softer ground digging in. If I’ve gotten stuck it’s because the fronts sink in not the rear. I have plans to replace them with 5.00x15s. Should I go bigger?
Also going to the larger rear tires with the larger diameter it did affect the speed of the tractor.
That didn’t affect its ability to pull heavy loads. The tractor has plenty of torque to spare. As for top speed 4th is definitely a traveling gear now if it wasn’t before, capable of going too fast if you ask me. Half throttle moves it along pretty well.
I put the matched set of 8.3s on my Cub. Could have mounted the 9.5s on it but I wanted to give the Cub what torque advantage I could for plowing snow.
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lwhiway
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Re: SA rear tire sizes and benefits

Postby lwhiway » Tue Jan 16, 2018 5:14 pm

Thanks Mike.

Thanks to all the others for chiming in for the info.

In particular, the last thing I need is faster ground speed and in fact do wish that first and second were slower still. I've not seen or read any info on changing gear sets for slower speeds, but one can hope.

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Re: SA rear tire sizes and benefits

Postby Super A » Tue Jan 16, 2018 5:35 pm

lwhiway wrote:Thanks Mike.



In particular, the last thing I need is faster ground speed and in fact do wish that first and second were slower still. I've not seen or read any info on changing gear sets for slower speeds, but one can hope.


In that case I would stick with your 9.5s. Do you have rear wheel weights?

Al
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Let us pray for farmers and all who prepare the soil for planting, that the seeds they sow may lead to a bountiful harvest.
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lwhiway
Posts: 32
Joined: Fri Jul 19, 2013 1:17 am
Zip Code: 70578
Tractors Owned: 1 69 Cub, 3 1951 SA's and tooling for all 4
Location: Indian Bayou, La. and Lake Charles, La.

Re: SA rear tire sizes and benefits

Postby lwhiway » Wed Jan 17, 2018 1:05 am

Do you have rear wheel weights?
As a matter of fact I've got rear wts on both rears and fronts for both tractors which has an additional pair of 100 lb wts for the light sides(which bolt to the massives.. These extra wts have IH markings but doubt they were for an A or SA. but fit the outer areas of the factory wts nicely and look as if they were an option (if one did not know)

As well I have another full set of wts bought in a farm auction.

I'll probably stick with the 9's with deep lugs on my #1 SA and go with 11's on the other. I can always swap rears to try both sizes for specific chores.

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Re: SA rear tire sizes and benefits

Postby Lt.Mike » Wed Jan 17, 2018 8:53 am

One other point is that if you go from a 9.5 tire to an 11.2 or 12.4 your going to need the wider 10” rims.
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Re: SA rear tire sizes and benefits

Postby Matt Kirsch » Thu Jan 18, 2018 12:54 pm

My Super A has 11.2x24's on it and I've never noticed it lacking for power pulling a 1-bottom plow. It does do a little bit better than manual ratings as far as speed is concerned, at least in 4th gear.

lwhiway
Posts: 32
Joined: Fri Jul 19, 2013 1:17 am
Zip Code: 70578
Tractors Owned: 1 69 Cub, 3 1951 SA's and tooling for all 4
Location: Indian Bayou, La. and Lake Charles, La.

Re: SA rear tire sizes and benefits

Postby lwhiway » Sun Feb 11, 2018 9:25 pm

Thanks for the reply's gents.


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