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John Deere Tractors Discussion Forum
Show Parts for Model:

1941 John Deere B Tire size

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cogger

12-28-2008 14:49:56
69.19.14.43



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What size tires belong on a 41 B? It presently has 12.4 x 38 I have a chance to get a set of rims and tires with 11 x 38 Are these correct. The tires are like new and the rims and hubs are in good shape. HE wants 500 for both Thanks, Paul




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cogger

12-29-2008 08:42:17
66.82.9.58



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 Re: 1941 John Deere B Tire size in reply to cogger, 12-28-2008 14:49:56  
WOW! Now that's a reply. Thanks guys.



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johndeereman

12-28-2008 17:42:15
74.36.221.222



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 Re: 1941 John Deere B Tire size in reply to cogger, 12-28-2008 14:49:56  
i just went back and looked at the parts book they list rims pressed steel and rims for cast wheels 8,9,10,11 inch 38's the bn and bw had a 42 inch tire



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jd40an

12-28-2008 16:53:44
208.126.1.172



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 Re: 1941 John Deere B Tire size in reply to cogger, 12-28-2008 14:49:56  
My Dad bought a new "B" in Oct of '41. It came from the factory on 9x38 tires. When we had to replace them, we bought 10x38's & later needed still another set. They were 11.2x38 (same as old size 10x38) and are still on this tractor--it sets in one of my barns. In my opinion, 11.2x38's "look right" for this size tractor. Anything larger appears as "overkill" to me.



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frmr96

12-28-2008 16:00:43
66.254.197.90



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 Re: 1941 John Deere B Tire size in reply to jdjerry, 12-28-2008 14:49:56  
I have a 1941 B, and my tire sizes as 13.6x38 and she moves down the road. Governor wide open, she'll top out at 22mph.

Tim



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gtx1967jewison

12-28-2008 17:00:13
72.18.120.252



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 Re: 1941 John Deere B Tire size in reply to frmr96, 12-28-2008 16:00:43  
u must have overdrive on it cuz aint no b without it goin 22 even with 18.4-38's on it & governor bypassed.



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johndeereman

12-28-2008 17:34:33
74.36.221.222



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 Re: 1941 John Deere B Tire size in reply to gtx1967jewison, 12-28-2008 17:00:13  
with 13 on mine would go about 25 the handstart as well as the unstyled had faster gears i assume you are thinking about the late models i got a cyclone a with the early gears in it and 14.'s on it that will go well over 30 wife said i was going 30 and i told her i was only half throttle so im guessing she will top out around 35 pretty fast on a 2 cyl with tricycle frontend



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johndeereman

12-28-2008 15:39:26
74.36.221.222



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 Re: 1941 John Deere B Tire size in reply to cogger, 12-28-2008 14:49:56  
there was a few options new you could get 11's 12's or 13's imo theyt look funny with 11's i call em bycicle tires my b (43) came with 13's from factory but they look too big i put 12.4's on it looks right for it with pressed steel wheels also came factory with these this is an oddball tractor as far as standards go but i guess with the war going on then they used what they had i saw a 43 b last summer that came factory with steel wheels they cut the spokes off and welded a rim on them since it was new but just goes to show you that you cant always believe what people think are the way all tractors came fropm the factory if you go to JDPARTS and download the book for a b it will list all available options them you can pic and choose from there

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Skyhawk Greg

12-28-2008 15:35:37
64.109.2.78



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 Re: 1941 John Deere B Tire size in reply to cogger, 12-28-2008 14:49:56  
"The Standard Book of John Deer Tractors" By Robert Pripps, lists the wheel size for a 1940-1947 Model B as being either a 7.50 - 36 or 9.00 - 36.

1941 Model B tractors are supposed to start with s/n 96000 and end with 126345 according to the above book. Using the JD parts catalog PC-330, page 99, I don't see any differentiation from year to year that clearly says what you are to use. However, for the regular Model B, I only see choices of pressed steel rims for 8 - 38, 9 - 38, 10 - 38, and 11 - 38 tires. There is an AB1452R rim for a B1545R cast wheel and 7.50 - 36 and 9.0 - 36 tires on the same page. This is the only reference to 36" rims that I see.

"John Deere Model B Restoration Guide", by Robert Pripps, calls for a 7.50 - 36 for the 1941 Model B.

Maybe this hodge-podge of information did not help much. Hopefully someone like DL will chime in.

Good luck!
Greg

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Skyhawk Greg

12-28-2008 15:46:37
64.109.2.83



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 Re: 1941 John Deere B Tire size in reply to Skyhawk Greg, 12-28-2008 15:35:37  
Just for kicks, I looked at the Nebraska Tractor Test for the 1940 Model B (Test 366) to see what was used for a rear tire. The test states that a 10 - 38 rear tire was standard. In one of the tests though (a special test K), they used a cast iron wheel and used a 9 - 38 tire.



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Skyhawk Greg

12-28-2008 16:27:21
64.109.2.88



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 Re: 1941 John Deere B Tire size in reply to Skyhawk Greg, 12-28-2008 15:46:37  
OK, one last post before I beat this to death with conflicting information. The Model B Operators Manual OMR2005, for S/N's B60000 to B201000, indicates that pressed steel wheels would have 10 - 38's, spoke type would have 9 - 40's, and cast wheels would have 10 - 38's.

If I am interpreting FIT's chart properly, this would indicate that a modern day 11.2 - 38 would be correct.



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F-I-T

12-28-2008 15:09:48
67.233.184.57



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 Re: 1941 John Deere B Tire size in reply to cogger, 12-28-2008 14:49:56  

Can't say as to the "correct" tire size without doing some research, but 11-38's are the same width as 12.4-38's. They changed the width sizing on tires in the late fifties from the width on the rim to the footprint width where the tire sits on the ground. 12's became 13.6's, 13's beacame 14.9's, etc.

Chart courtesy of Miller Tire.

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blinwmi

12-28-2008 16:07:28
75.129.101.40



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 Re: 1941 John Deere B Tire size in reply to F-I-T, 12-28-2008 15:09:48  
I don't mean to hi jack the post but on this line of thinking, I had a question. On my 720 standard I have rims that are 21" bead to bead. It has 18.4 on it now but one sidewall blew out so tryimg to figure next move. 18.4 doesn't seem correct but it doesn't look to odd. Would these 18.4s have a shorter life on these rims or would I be better to go to a 23.1 or so?



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Wilamayb

12-28-2008 17:51:33
70.223.15.166



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 Re: 1941 John Deere B Tire size in reply to blinwmi, 12-28-2008 16:07:28  
If thats the 720 from TN I think someone did some cutting and pasting to make those rims wider for some reason which we'll never know.

I'm too lazy to get the PC out, but many of the standards had 16" rims which looks good with an 18.4X30.

All three of the 70/720 standards at my house are equipped as such. Seems as it's as Frank said that some of the rice tractors have the 23.1X26 tires. I have a 70 std. from rice country, but it is equipped with 16X30 rims. The 26" are in somewhat less supply. It seems as most have the 30" rims.

If you like the fat rubber there may be a tire to fit on your rim as it is. Miller tire web site if you need to know how to measure your rim (you may know already)...

If you plan to do any plowing with this tractor you may not want anything wider than an 18.4X30, or it may become difficult to get the tire to fit in the furrow unless you use 18" bottoms. My 18.4 just almost doesnt fit in a 16" furrow. It mashes the plowed portion just a bit.

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blinwmi

12-28-2008 18:21:03
75.129.101.40



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 Re: 1941 John Deere B Tire size in reply to Wilamayb, 12-28-2008 17:51:33  
Hey Will, yea I wondered about the tire fitting in the furrow if I went bigger than 18. I don't know how much difference it would make, heck I pulled a plow with the 5020 with the duals on, I was to lazy to take the loaded duals off. I am not sure what way to go, I have tire chains for it now that probably won't fit 23.1, But not sure if I want to buy new rims and tires or maybe just put new 18.4's back on. I just wondered if the odd fit to a 21" wide rim might weaken the life of new tires. Any suggestions?

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Wilamayb

12-28-2008 19:20:26
70.223.15.166



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 Re: 1941 John Deere B Tire size in reply to blinwmi, 12-28-2008 18:21:03  
No suggestions on tires but a suggestion to move somewhere where you dont need those chains. LOL. I hate winter in TN. I cant even imagine winter in MI! It's not for me. I've thought of moving farther south myself......

On the tire rim situation... You may want to let the price of new tires be the deciding factor. One may be much more expensive than the other, or then again maybe not. I wouldnt think that 16X30 rims for a standard would be difficult to find or very expensive. I do think that you may like the look of the tires better on factory rim to get rid of that "bulged" look of a skinny tire on a fat rim.

So many decisions.......

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F-I-T

12-28-2008 17:27:21
67.233.184.57



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 Re: 1941 John Deere B Tire size in reply to blinwmi, 12-28-2008 16:07:28  
Not sure where you are measuring, as it should be from inside edge to inside edge. Factory did not offer a 21", but they did offer a 20" wide rim at 26" diameter. Not sure what diameter you have. That rim is listed for use with a 18-26 tire. I'm not sure what that size would be in modern day lingo. I've seen 23.1 before, but that seems wide for a an 18" tire. Sorry I can't offer more to you on this.

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blinwmi

12-28-2008 17:43:30
75.129.101.40



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 Re: 1941 John Deere B Tire size in reply to F-I-T, 12-28-2008 17:27:21  
Sorry I didn't give more details, it is a 30" rim. Someone cut and welded in strips to widen it. It measures 21" inside bead to inside bead, about 22 out to out. It didn't look terrible with the 18.4x30 but I just wondered if that stance would weaken the tire.



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