Tire size on the A

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

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Capnball
Cub Star
Cub Star
Posts: 72
Joined: Tue Jul 08, 2014 4:10 pm
Zip Code: 37097
Tractors Owned: 1941 Farmall A, serial #FAA 79827
Location: Lobelville, Tennessee

Tire size on the A

Postby Capnball » Tue Jun 16, 2015 8:52 am

Hey guys, here's something that's bugging me: I will be buying tires for the A asap, and all the manuals and such specify 8x24s as standard equipment, and larger and smaller sizes as optional. I always see 9.5s and larger on A's, and I was wondering about 8.3's. I realize those look really small, and that I would need the proper size rims, but I was curious to know what y'all think. Have tire sizes changed much? Which size is closer to the original 8x24 specified in the manuals? Supposedly tire size can make a slight difference in transfer of power to the ground, as well as speed, and I sure would mind lower speeds while doing things like cultivating. How about looks? Anybody got pics of an A with 8.3s on it? Thanks ahead of time!
Jordan Goodwin
1941 Farmall A


Micah 6:8

Our blog: http://www.home-at-winshaw.com/

Super A Farms
Posts: 1
Joined: Wed Jun 10, 2015 10:49 am
Zip Code: 08302
eBay ID: oldihtractor
Tractors Owned: 2010 farmall 95
2000 case ih 3220
1916 IH motor cultivator
1918 IH 8-16
1919 IH 10-20 titan
1950 SA
100 HC
130 HC
140HC
Super Av
1066 HC
504 HC
39 40 41 A
240 340 wf
f-12 wf
f-14 wf
f-20 wf
1066 hydro
Location: Bridgeton NJ

Re: Tire size on the A

Postby Super A Farms » Thu Jun 18, 2015 11:15 am

Here is my 1940 with original 8.3x24 rears
Attachments
DSC03723.JPG

User avatar
havoc1482
5+ Years
5+ Years
Posts: 987
Joined: Fri Sep 20, 2013 11:17 am
Zip Code: 01034
eBay ID: havoc1482
Tractors Owned: _______ 1948 Farmall Super A
Circle of Safety: Y
Twitter ID: @havoc1482
Location: Granville, MA

Re: Tire size on the A

Postby havoc1482 » Thu Jun 18, 2015 11:55 am

Edit: I actually think I have 9.5s but I cant remember because it always seems to me that my tires are smaller than every other A\Super A I've seen

I will say that tire size isn't going to have much effect on ground speed in anything less than 4th. Just Look at the AV and Super AVs, wheels were huge.
Attachments
10463904_10204466310672441_507899461270136655_n.jpg
Mike
Image

I bleed Black & Gold

IH Collectors Club New England (Chapter 18)

Western Mass. (The 413)

User avatar
Boss Hog
Cub Pro
Cub Pro
Posts: 10241
Joined: Mon Oct 24, 2005 8:35 pm
Zip Code: 23962
eBay ID: dmb2613
Circle of Safety: Y
Location: VA. Randolph

Re: Tire size on the A

Postby Boss Hog » Thu Jun 18, 2015 5:09 pm

I would not consider anything smaller than 11.2s just my opinion, if you plan on using it for anything other than riding it
IN GOD WE TRUST
All others pay cash
Boss Hog
Power corrupts; absolute power corrupts absolutely byJohn Emerich Edward Dalberg

User avatar
Dale Finch
5+ Years
5+ Years
Posts: 3191
Joined: Tue Apr 27, 2010 11:34 am
Zip Code: 27517
Tractors Owned: '55 Cub "Bertha"
'55 Cub "Ben"
'56 Cub "Boris"
'48 Super A "Bubba"
Circle of Safety: Y
Location: NC, Chapel Hill

Re: Tire size on the A

Postby Dale Finch » Thu Jun 18, 2015 6:15 pm

I ended up with the 11.2's. They REALLY look big by comparison here: :shock:
P8015604 (Small).JPG


but they actually are proportional once installed! :D
IMG_0065 (Small).JPG

Matt Kirsch
10+ Years
10+ Years
Posts: 4604
Joined: Tue Jun 08, 2004 3:04 pm
Zip Code: 14559
Circle of Safety: Y
Location: Rochester, NY

Re: Tire size on the A

Postby Matt Kirsch » Sat Jun 20, 2015 6:58 am

I usually get the dashes and exxes mixed up, but there are two ways of denoting tire size.

A tractor as old as a Farmall A would have originally used the old way, which was 8-24, using a whole number to indicate width. Some time in the 1950's, tire manufacturers switched to a decimal number to show width, with the number often being much larger than the old whole number width.

AFAIK, old size 8-24 is equivalent to 9.5x24 in a modern tire.

User avatar
Denny Clayton
10+ Years
10+ Years
Posts: 4336
Joined: Wed Feb 05, 2003 1:18 pm
Zip Code: 45365
Tractors Owned: Home to "Rusty", the 2007 and 2009 Cub Tug Champion.
Circle of Safety: Y
Location: OH, Sidney

Re: Tire size on the A

Postby Denny Clayton » Sat Jun 20, 2015 9:26 am

The 8-24 size became 8.3-24.
'61 Lo-Boy
'60 FH Lo-Boy
'60 Lo-Boy
'57 FH Cub "Rusty"
FH Woods 42F, 54A blade, 194 plow, FH L-38 disk, FH Lo-Boy disk, FH platform carrier
Image
Circle of Safety

User avatar
twotone
5+ Years
5+ Years
Posts: 1185
Joined: Sat May 14, 2011 6:09 pm
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety: Y
Location: Versailles,Pa.

Re: Tire size on the A

Postby twotone » Sun Jun 21, 2015 8:43 am

I put 12.4's on my super A.
Attachments
001 (640x480) (2).jpg
Know Your Cub, And Your Cub Will Know You.

Tom

Capnball
Cub Star
Cub Star
Posts: 72
Joined: Tue Jul 08, 2014 4:10 pm
Zip Code: 37097
Tractors Owned: 1941 Farmall A, serial #FAA 79827
Location: Lobelville, Tennessee

Re: Tire size on the A

Postby Capnball » Tue Jun 23, 2015 12:17 pm

Thanks guys! Especially for the pix. Wonder how those original 8s actually compare to new tires in measurements. I did find some interesting info in this FAQ page on Miller Tire's website: http://www.millertire.com/faqs/ Check it out, and tell me what you think. If they're right and I'm reading them right, then a 40s era 8x24 would be more like a modern 9.5x24.
Jordan Goodwin
1941 Farmall A


Micah 6:8

Our blog: http://www.home-at-winshaw.com/

Capnball
Cub Star
Cub Star
Posts: 72
Joined: Tue Jul 08, 2014 4:10 pm
Zip Code: 37097
Tractors Owned: 1941 Farmall A, serial #FAA 79827
Location: Lobelville, Tennessee

Re: Tire size on the A

Postby Capnball » Tue Jun 23, 2015 12:20 pm

My A has a set of modern 11.2s that are ruined from sitting too long without air in them. They would have been great tires; not much wear at all. I think I'm leaning towards the 9.5s now.
Jordan Goodwin
1941 Farmall A


Micah 6:8

Our blog: http://www.home-at-winshaw.com/

Gordon1121
Posts: 10
Joined: Fri Apr 03, 2015 8:30 am
Zip Code: 40475

Re: Tire size on the A

Postby Gordon1121 » Wed Jun 24, 2015 7:15 am

I've was reading this post and thought I'd share my experience with the new tire sizes. The first pic is our 100 with 10.5 Firestone field and road which were worn down pretty good and the next is with new Titan 11.2 although a little different angle you can see cover a lot more fender. I have a 130 with the 9.5 and the 100 with the 11.2 Titan. I don't know if it makes a difference or not but it did make it harder to get on by some bit and if you plan on using it you cant run as narrow a row. To me the new 11'S are more like the old 12'S.

Image


Image

Capnball
Cub Star
Cub Star
Posts: 72
Joined: Tue Jul 08, 2014 4:10 pm
Zip Code: 37097
Tractors Owned: 1941 Farmall A, serial #FAA 79827
Location: Lobelville, Tennessee

Re: Tire size on the A

Postby Capnball » Mon Jul 06, 2015 5:38 pm

Thanks for all the input, guys. I'm really liking the looks of the new 9.5s, but I'm not sure how they'll mount up on my rims...

I had the old tires taken off today, and the rims are 9" rims. Can I mount a 9.5 on these rims, or will I be forced to go with an 11.2? Does anyone have pics of 9.5s mounted on 9" rims? What do y'all think? I see modern 9.5s are normally mounted on 8" rims, and 11.2s on 10" rims- but I can't find anything on 9" rims.

Also, what about fronts? Have front tire sizes changed over the years too? Assuming they haven't, I was planning to mount 4x15 tires on my original 3x15 rims- or do I need 5x15 tires? Really confusing.
Jordan Goodwin
1941 Farmall A


Micah 6:8

Our blog: http://www.home-at-winshaw.com/

Matt Kirsch
10+ Years
10+ Years
Posts: 4604
Joined: Tue Jun 08, 2004 3:04 pm
Zip Code: 14559
Circle of Safety: Y
Location: Rochester, NY

Re: Tire size on the A

Postby Matt Kirsch » Tue Jul 07, 2015 6:48 am

Where did you measure the width of the rim? IIRC, the rim width is measured BETWEEN the beads, not to the outside of the flange.

Odds are you have 8" rims, but even if you somehow ended up with the only two 9x24 rims in the known universe, your new tires will stretch slightly to fit them just fine. As a rule of thumb you can go up or down one size of tire on a given rim with no issues either in looks or functionality.

Jim Becker
Team Cub
Team Cub
Posts: 13797
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: Tire size on the A

Postby Jim Becker » Tue Jul 07, 2015 8:37 am

The As and Super As originally equipped with 10-24 tires had W9-24 rims. The replacement for that size tire is 11.2-24 which is now usually put on a W10-24 rim. 9-24 tires came on a W8-24 rim. I would not hesitate to put 9.5-24 tires on either size rim.

The original 8-24 tire (now 8.3) was on a W7-24 rim. I would not put that size tire on a 9-inch rim.


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall A, Super A, AV, 100, 130 & 140”

Who is online

Users browsing this forum: No registered users and 2 guests