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Old 01-06-2013, 11:04 AM   post #1 of 10
Z71Edge
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Icon2 Tire Question (R1 vs R4) for B series Kubota's

Hi all, I'm looking to buy a B2620/B2920 machine within the next year/two years tops. I will NOT be using the tractor for cutting grass. It will be used primarly for gardening, moving dirt, driveway grading/plowing, etc. My question is can you guys give me some realworld input as to if I would be better off with R1 style tires (like on the "narrow" B series) or would the R4's be ok? My grandfather has a B2320 with standard R4's and so does my buddy's L series. However they both have mentioned that they didn't really care much for the R4 style tires and wish they had narrower R1 tires for traction. This is exactly what I had suspected and gives me reason to think for my use of this tractor, the R1 tires would be a good choice. However, I do understand the R4's are wider and provide more stability.

So does anybody have experience with this issue and can provide me with some input? Advantages/Disadvantages to both for this machine?

Thanks guys!
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Old 01-06-2013, 12:43 PM   post #2 of 10
Gundoctor
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

I suggest R-1 only. You could not give anything but these where no mowing was being done. I have had many tractors in over 50 years and for "me" this is the only way to go.

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Old 01-06-2013, 01:25 PM   post #3 of 10
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

IMHO R4 tires are a compromise between R1 and R3 for the tractor who often run on a pave road therefore they wear out less quicker.




R1 AG, R3 TURF, R4 industrial-multi-purpose

In Dry HARD conditions the R4 and turf and ag do quite well, with the R4s doing best

In DAMP HARD conditions the R4 and ag do quite well, with the R4s doing best
When this soil is wet, it sticks to the turf tires.

In DAMP SOFT conditions the R4 and ag do quite well, with the R4s doing best

In WET Hard conditions the R4 and ag do quite well, with the R4s doing best

In WET SOFT and SLOPPY conditions the R4 and ag do quite well, with the AGs doing best

In ALL CONDITIONS where the primary function is using a LOADER -> the R4 do best of all.
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Last edited by stladrill; 01-06-2013 at 09:05 PM. Reason: spelling
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Old 01-06-2013, 07:35 PM   post #4 of 10
chaosracing
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

I have R4 on my B2620. I have run it thru everything. The only issues I have had with it are on ice or hard pack snow. But then any tire would have problems with that.
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Old 01-07-2013, 01:27 AM   post #5 of 10
TooManyGT
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

I prefer the R4's on my B2620, I only do loader/3pt work with it, if your working in muddy conditions all the time I would prob go with the R1's. If your working in the yard a lot and regrading roads/ working on pavment alot I would go with the R4's.

R1's can be harder on the lawn etc.
R4's most likely won't clean themselves in in really muddy conditions although I've never gotten mine stuck and have been in some pretty nasty mud pulling a 5ft box blade
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Old 01-07-2013, 12:15 PM   post #6 of 10
Z71Edge
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

Thanks guys for your inputs. My driveway is about 250ft long, all gravel. My garden is pretty good size for myself (80x120)..pretty much plant everything I know I'll go through in a year plus what my friends/family may want. I do alot of canning. Either way, most of the work will be for the garden (plowing, tilling, etc.), loader work when needed, and clearing the driveway in winter.

My house is on 3 acres, 2 of it is yard and the other is woods...down the road I plan to purchase a nice 40-50 acre wooded lot for a cabin/hunting...So, me being me and thinking ahead, I will be using the tractor down there for clearing a little bit and doing what I need it to do, while still maintaining my property at home. This is why I have been considering going with R1's instead of the R4's.

I saw some pictures on another website of a guy that is running a set of R1's that are actually about as wide as the R4's...I will try to post a picture in a few of this, as I would also be interested in these too.
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Old 01-07-2013, 12:19 PM   post #7 of 10
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

Does Kubota offer narrow R1s as an option? I thought their ag option was the same width as the turfs and R4s? That would be nice if the tires (not to mention the 3PH position control) from the B2320N were available on the other models.
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Old 01-07-2013, 12:42 PM   post #8 of 10
Z71Edge
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

They offer a "narrow" style B2320, but i havent seen the same offered for the B2620/2920...I am going to ask my dealer abou this and if i can still get these tires as an option
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Old 01-07-2013, 12:51 PM   post #9 of 10
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

Quote:
Originally Posted by Z71Edge View Post
They offer a "narrow" style B2320, but i havent seen the same offered for the B2620/2920...I am going to ask my dealer abou this and if i can still get these tires as an option
Yeah, there is no narrow version of the 2620 or 2920. Only the 2320N (offered with an HST or geared).

I guess the question is whether you can get the narrow R1 tires from the 2320N on any of the other models (2320/2620/2920)? My hunch is they will say no, so your options will be the turfs, ags, or R4s. The ags are the same width as the R4s and turfs.
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Old 01-07-2013, 07:46 PM   post #10 of 10
Z71Edge
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Default Re: Tire Question (R1 vs R4) for B series Kubota's

Yeah if I can get out of work early enough to get to the dealer before they close, I will find out about the tires. If I have a choice to be able to get something other than R4's on the 2620/2920, that will be great. If not, I will ask them about trading the new R4's towards a set of ag's. I just have a really good feeling that I will be better off for my use of the machine.

Well here is the picture I found of a JD with "wide" R1 ag tires...the other picture is one I found of a B2320 with ag's, not sure if this is the "narrow" version or not..

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