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  1. #1
    Gold Member JMER817's Avatar
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    Jul 2008
    Posts
    458
    Location
    Grass Lake, Michigan
    Tractor
    John Deere 4120

    Default Loaded tires on 3x20

    For the 3000 series tractor owners that loaded their tires... How much stability has this added to the tractor? Do you notice a lack of power or more difficulty going up inclines due to the added weight?

  2. #2
    Super Member greg_g's Avatar
    Join Date
    Dec 2003
    Posts
    6,086
    Location
    Western Kentucky
    Tractor
    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: Loaded tires on 3x20

    Filling all four tires to the 70% mark with RimGuard was a big help; ~400# to each rear, ~85# to each front. But it still felt like I needed more stability. So I added a pair of 4" MotorSport machined aluminum spacers on the rears, which made a profound difference. The improvement was such that I've ordered a pair of 2.5" spacers for the front.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

  3. #3
    Veteran Member sunnyside360's Avatar
    Join Date
    Aug 2006
    Posts
    1,469
    Location
    Central PA
    Tractor
    JD 3720 Cab, JD 4320, Kubota M110X Cab, Kubota ZD331-72, Kubota RTV-X1100C

    Default Re: Loaded tires on 3x20

    My 3720 rears were filled with RimGuard since new/delivery so I can't compare with and without the added weight. However, with several hundred pounds in each rear tire stability has to be greatly increased. Since I have a number of steep inclines (some very steep) I also added the 2" wheel spacers on each rear side after about a year of use and these spacers do greatly reduce the "pucker factor" for me. I doubt very much if you could see any difference in power going up hills with the added weight. The tractor almost always loses traction before bogging down for power.

  4. #4
    Gold Member jjmarotz's Avatar
    Join Date
    Oct 2007
    Posts
    370
    Location
    Ashton, Idaho
    Tractor
    JD 3720 cab

    Default Re: Loaded tires on 3x20

    All 4 tires loaded with CC. The difference in traction was night and day!!!!!! Didn't change power that I could notice. If anything it "seems" to have more..... ie the traction you gain feels like it can do more than before. Hope that makes sense.

  5. #5
    Gold Member Cocre's Avatar
    Join Date
    Aug 2008
    Posts
    424
    Location
    Sandy Run, SC
    Tractor
    '06 John Deere 3320

    Default Re: Loaded tires on 3x20

    Loaded the R4 rears with water and a gallon or two of antifreeze each. It turned my 3320 into a beast. It does strain the tractor a bit more going up a nearby steep asphalt road incline, but I do not notice a power difference in normal operation.
    '06 John Deere 3320

  6. #6
    Elite Member foggy1111's Avatar
    Join Date
    Dec 2008
    Posts
    2,512
    Location
    Nisswa, MN
    Tractor
    JD 3320 eHydro w/ 300CX Loader

    Default Re: Loaded tires on 3x20

    I have loaded R4's on my 3320 and a heavy box blade with weights for rear ballast. No reduction in power.

    My BIL has the same 3320 and a CL loader like mine without loaded tires and light wieght box. I was using his the other day to help him with some down trees. PFFFFT. His tractor sucks. Spin the tires very easily.....and when I tried to lift a light section of tree trunk...the rear end went airborne. Dumb.....and unsafe. Same tractor models....but night and day difference between his tractor and mine in operation.

    I don't understand why folks refuse to load their rears.....especially if you have a loader.
    3320 eHydro, 300CX Loader & 15 + great attachments

    You gotta mine allot of dirt to find a diamond.

  7. #7
    New Member
    Join Date
    Nov 2013
    Posts
    19
    Location
    KY
    Tractor
    John deere 1020

    Default Re: Loaded tires on 3x20

    Thought I'd revive this thread to pick knowledgeable brains

    What is the center to center width with the R4 tires in the wide position before spacers

    Is anyone using R1's?

  8. #8
    Super Member greg_g's Avatar
    Join Date
    Dec 2003
    Posts
    6,086
    Location
    Western Kentucky
    Tractor
    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: Loaded tires on 3x20

    There's very little difference in reversing the rear R4s on a 3x20. Plus, the answer you're looking for depends upon which R4 wheel/tire combination is installed. The specification section of the owner manual lists the following;
    Overall Length w/ 3-Point Hitch 3.1 m (120.2 in.)
    Overall Width w/ R1 Tires (Minimum) 1.3 m (52.4 in.)
    Overall Width w/ R1 Tires (Maximum) 1.7 m (68.4 in.)
    Overall Width w/ R3 Tires (Minimum) 1.4 m (53.9 in.)
    Overall Width w/ R3 Tires (Maximum) 1.5 m (59.1 in.)
    Overall Width w/ 43 x 16.00-20 R4 Tires (Minimum) 1.5 m (58.1 in.)
    Overall Width w/ 43 x 16.00-20 R4 Tires (Maximum) 1.5 m (59.7 in.)
    Overall Width w/ 15.00-19.5 R4 Tires (Minimum) 1.4 m (57.3 in.)
    Overall Width w/ 15.00-19.5 R4 Tires (Maximum) 1.5 m (58.9 in.)
    Overall Width w/ Golf Tires (Minimum) 1.5 m (59.5 in.)
    Overall Width w/ Golf Tires (Maximum) 1.6 m (64.7 in.)
    Inside Width w/ R1 Tires (Minimum) 1.03 m (40.6 in.)
    Inside Width w/ R1 Tires (Maximum) 1.4 m (56.6 in.)
    Inside Width w/ R3 Tires (Minimum) 1.02 m (40.4 in.)
    Inside Width w/ R3 Tires (Maximum) 1.2 m (45.6 in.)
    Inside Width w/ 43 x 16.00-20 R4 Tires (Minimum) 1.1 m (42 in.)
    Inside Width w/ 43 x 16.00-20 R4 Tires (Maximum) 1.1 m (43.7 in.)
    Inside Width w/ Golf Tires (Minimum) 1.02 m (40.3 in.)
    Inside Width w/ Golf Tires (Maximum) 1.2 m (45.5 in.)
    Inside Width w/ 15.00-19.5 R4 Tires (Minimum) 1.1 m (42 in.)
    Inside Width w/ 15.00-19.5 R4 Tires (Maximum) 1.2 m (43.7 in.)

    So it would seem your answer would involve selecting which tires you have from the above, and splitting the difference between max and min width figures.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

  9. #9
    New Member
    Join Date
    Nov 2013
    Posts
    19
    Location
    KY
    Tractor
    John deere 1020

    Default Re: Loaded tires on 3x20

    Thanks greg_g

    I have the numbers from the owners manuals John Deere Ag - New Equipment: Technical Publications - Equipment Search
    but I'm trying to get real numbers from people with these tractor.

    68.4" tread width and R4 has 58.9 " These numbers must reflect 8 position wheels on the R1 and two position wheels on the R4
    According to the manual this is a center to center measurement

    Also the manual states that 8 position wheels are standard with R1 and I assume optional with other tire types. Does anyone have 8 position wheels and R4 tires?


    I have another thread here

    John Deere 8 position wheels

  10. #10
    Super Member greg_g's Avatar
    Join Date
    Dec 2003
    Posts
    6,086
    Location
    Western Kentucky
    Tractor
    JD3720 Cab, 300X loader with 4-in-1 bucket

    Default Re: Loaded tires on 3x20

    I'd be surprised if you get the response you're hoping for. The two R4 tire sizes spec'd for the 3x20 simply won't fit on the OE spec R1 rims. Neither size R4 tire has either a bead width or bead diameter compatible with the 3x20 R1 rim.

    //greg//
    USN (Ret)
    Former Chinese tractor owner (x4)
    Current John Deere owner

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