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post #1 of 21 Old 07-27-2015, 06:43 PM Thread Starter
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646 tires

I just purchased a Case 646. The rear tires are not in horrible shape, but are starting to crack around the sides. They are passenger tires 215/75R15. Is this normal? If so I was thinking about replacing them with some inexpensive used snow tires for added traction in the winter. What do you think?

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post #2 of 21 Old 07-27-2015, 08:43 PM
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Re: 646 tires

That's the same size tires I have on my 1991 Geo Tracker ... ... Definitely not what you want on there. At the very least you will need chains and a lot of weight in the back. I'm sure members here will suggest what is the best way to go depending on your intended use. I would think you would want something like this for an all around tire: Skid Loader Tires - 27x 8.50-15 - m. e. MILLER tire



Last edited by RestMyCase; 07-27-2015 at 10:33 PM.
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post #3 of 21 Old 07-27-2015, 10:39 PM
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Re: 646 tires

Car tires are less expensive than tractor tires.
Especially if you can find them used.
Weights and chains are what give you traction!
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post #4 of 21 Old 07-28-2015, 05:07 AM
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Re: 646 tires

If you're looking for an R1 (farm tractor) tread, good luck. They are not made anymore. I have been working with a couple different tire manufacturers to build 27x8.50-15 (the correct tire for your Case) and actually almost succeeded until budget cuts shut it down.

Anyway, you have turf tires or a skid steer tire in that size available. Skid steer tires are okay, but some will say they suck on the Case. In reality, unless you want to build spacers, get new wheels and buy 29" true powers, skid steer tires are your best option. Try to find one in a 4 ply though, rather than 6 or 8 ply as they dont have any give on a machine as small and relatively light as the 646.

2007 John Deere X748
1991 John Deere 332
1973 John Deere 140 H3
1973 John Deere 110

1974 Case 646
1961 Cub Cadet Original
1979 Sears LT10 36 (restored, it was my first tractor)

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post #5 of 21 Old 07-30-2015, 09:37 AM Thread Starter
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Re: 646 tires

Thanks for the info. I thought passenger tires weren't the correct thing! Money is right right now so I'll leave them and see how they do with chains which I have.
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post #6 of 21 Old 09-13-2019, 10:59 PM Thread Starter
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Re: 646 tires

I realize this is a really old thread, but I thought I would write an update about the tires on my Case. I ended up getting Carlisle R-1 7-14 tires, with new 6 lug 14"x6" rims. Although they are a little smaller than the proper tires, they work well and have provided a great deal of traction in soft soil. I've got them filled with windshield washer fluid and was able to mount the Case wheel weights on the new rims. They don't fit perfectly but they do fit.
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post #7 of 21 Old 09-14-2019, 02:25 AM
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Re: 646 tires

Thanks for the update! I ended up with the skid steer tires and loaded them with rimgard at 130lbs per side, plus 60lbs of cast weights on each side. They have been great for me.

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2007 John Deere X748
1991 John Deere 332
1973 John Deere 140 H3
1973 John Deere 110

1974 Case 646
1961 Cub Cadet Original
1979 Sears LT10 36 (restored, it was my first tractor)

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post #8 of 21 Old 09-14-2019, 10:24 AM
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Re: 646 tires

I picked up 15x10 6 hole rims and 29x12.50-15 turf tires with logger 2 link chains. When you chain a tire whether they are loader or turf tire tread, it does not matter much.

They each have 150 lbs of RimGuard and 160 lbs combine weights. I built the spacers.

Something I learned, 15x10 rims do fit the combine weights. where the stock 15x7 rims do not.

I will post pictures when I get them mounted. Or actually test fitted.
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post #9 of 21 Old 09-16-2019, 11:47 AM
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Re: 646 tires

I've had AMERICAN FARMER TRACTION IMPLEMENT I-3 7.60 x 15's on my 646 and they are good tires.. I wanted to go to the 160 pound combine weights, so I put 16 inch rims from a 446 on my tractor and used 7-16 Trupowers:

To follow up on tires for the 646 (or what I am running this season).

With the loader we are always looking for more ballast. it's like an obsession.. The little squirt can lift more than it can move.. AKA it lifts the rear wheels off the ground..

So, I picked up a set of 'Combine' weights that tip the scales at 160 pounds each. Which would take 4 - Case D 10's weights in each side to come close. and of course you'd have to find the D-10's and pay $$$$ for them.

BUT, the combine weights won't fit in the 15" rims on the loaders (there is apparently a 10 inch wide 15 inch rim that they WILL fit into) but for the standard oem 7 x 15" rims the 160 pound weights don't fit. The weights were designed for and DO fit 16 in rims, like the 4xx and 40xx tractors have.. Hmm, I have a 446 that I am scrapping. Does anyone make a tire that I could put on a 16 inch 446 rim and still fit under the fenders on the loader?

The size chart from the Carlisle catalog has some interesting data in it.. The 7 -16 tires stand almost 2 inches shorter than the 8 - 16 tires. And at 29 inches the Carlisle 7 - 16's are actually shorter than the "American Farmer" 7.60 x 15:

Carlisle 7 -16 on 8" wide 16" rim from 446 on the right. American Farmer 7.60 x 15 on the 646's original 7" wide by 15 rims on the left. The 16" tire is actually a 1/2 to 1 inch shorter than the 15".

Width wise the lugs on the Carlisle measure just a tag short of 7" wide while the American Farmer measure 7 1/4" And the Carlisle has deeper lugs but fewer of them.
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1973 Case 646 (w/Custom Power Steering)
1968 Case 155
1958 JI Case 310 Terratrac Crawler Loader
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post #10 of 21 Old 09-16-2019, 11:55 AM
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Re: 646 tires

Patiently waiting for pictures.. Curious how wide of spacers did you need to build?

When I had my head under an Ingersoll 6020, which has the 15 x 10 rims on it from the factory. the Axles look similar to the extended axles the Backhoe models used with the floatation tires..

Quote:
Originally Posted by ssmewing View Post
I built the spacers. I will post pictures when I get them mounted. Or actually test fitted.

1973 Case 646 (w/Custom Power Steering)
1968 Case 155
1958 JI Case 310 Terratrac Crawler Loader
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post #11 of 21 Old 09-16-2019, 01:43 PM
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I built them 2 3/4 inches. I want them in as much as possible. So, I set it with what I thought was the least amount knowing that I could add plates if needed. Also, it's only the left side that may need more. I would add more on the left than the right if it didn't show as obvious.
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post #12 of 21 Old 09-16-2019, 07:51 PM
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Re: 646 tires



I have to do a test fit. Then paint and studs. I even splurged and bought a stud installer bearing.
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post #13 of 21 Old 09-16-2019, 08:02 PM
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Re: 646 tires



Here are my nearly bald tires. That does not matter once the 2 link chains are on. Not only is that cheaper than the awesome looking treads I could buy, but did not have the money for, but you cannot beat chains for year-round traction. I have some logger chains, meaning big chain links that are NOS I found on CL.

The guy I bought the chains from had a couple of Steiner tractors with the dump bed. I had one but lost it in the divorce. Those things are awesome. If I still had it I never would have become a Case guy. When You can push wet heavy snow with a 60" angled blade at full speed with bald tires and no chains, you are in tractor heaven. I had pretty much every attachment except for the front brush attachment and brush hog.
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post #14 of 21 Old 09-16-2019, 08:07 PM
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Re: 646 tires

Quote:
Originally Posted by ssmewing View Post


I have to do a test fit. Then paint and studs. I even splurged and bought a stud installer bearing.
Whenever I make things I usually make extra. I will have 1 extra set of spacers. I don't know what I will be asking for them yet. I can't finish the second set until the GM strike ends. Some of the work was a government job at a GM plant.
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post #15 of 21 Old 09-16-2019, 08:23 PM
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Re: 646 tires

If you guys want a different option I found a bunch of ATV tires that would work on your 15" rims. 27x9-15, 27x9.5-15, 26x10-15(which would squish up to be at least 27" tall) here.

https://www.chapmoto.com/atv-tires?d..._rim_size=3429

I run ATVs on both of my GTs and they grip like nothing else and don't need chains. Do not tear up my grass as they just flat out do not spin at all.
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