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  1. #1
    Veteran Member TSO's Avatar
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    Massey 1648 HST Cab

    Default QUESTION: any problem adding larger front tires?

    Just picked up a new Massey 1648. It came standard with 10x16.5 R4's. I prefer the 12x16.5's that are on my LS. The wider/taller tires helped with stability and floated better.

    We're only talking a couple inches difference. Would that cause any harmful problems to the driveline? If so, what?




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    Massey 1648 Cab - Hustler Z Diesel 66" mower
    2007 F450 Crew - 20' PJ Equipt Trailer
    QA 6ft bucket * 5ft Custom Grapple Bucket * QA Forks * 8ft Rhino Back Blade
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    WorkSaver SG-26 Stump Grinder * Wallenstein BX42s Chipper * 8ft Ford Brush-Mower
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    345 flawless hrs @ 11/5/14

  2. #2
    Platinum Member bdog's Avatar
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    Texas
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    John Deere 4440

    Default Re: QUESTION: any problem adding larger front tires?

    If it is four wheel drive yes it will be problem. The tire sizes are matched to the gear ratios of the front and rear drive lines so that they work in sync. If you put larger front tires than stock they will try to make you go faster than the rear tires will which means either the fronts or rears are going to be constantly slipping. I would not recommend it
    1980 John Deere 4440 with duals
    2006 John Deere 322 compact track loader

  3. #3
    Veteran Member TSO's Avatar
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    Massey 1648 HST Cab

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    Quote Originally Posted by bdog View Post
    If it is four wheel drive yes it will be problem. The tire sizes are matched to the gear ratios of the front and rear drive lines so that they work in sync. If you put larger front tires than stock they will try to make you go faster than the rear tires will which means either the fronts or rears are going to be constantly slipping. I would not recommend it
    It is 4wd, and I thought about that, but what makes me wonder is that you can get different sized rear tires as an option, with the same size fronts.
    Massey 1648 Cab - Hustler Z Diesel 66" mower
    2007 F450 Crew - 20' PJ Equipt Trailer
    QA 6ft bucket * 5ft Custom Grapple Bucket * QA Forks * 8ft Rhino Back Blade
    7ft Rhino Box Blade * 7ft LandPride Rake * 6.5ft KK HD Box Disc * Middle buster plow
    WorkSaver SG-26 Stump Grinder * Wallenstein BX42s Chipper * 8ft Ford Brush-Mower
    7.5ft QA snow plow (still under construction)

    345 flawless hrs @ 11/5/14

  4. #4
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    Up State S.C.
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    AC WD 34 hp/3500 lbs MF 261 60 hp/5380 lbs

    Default Re: QUESTION: any problem adding larger front tires?

    Your bucket might not go low enough for optimum digging and a vertical muffler/exhaust pipe might be tilted back a bit. I noticed this when I put used aircraft tires on the front of my 2WD MF. I was able to lower the bucket a notch by moving a pair of pins. Couldn't do anything about the exhaust, I hope it's only cosmetic.
    Last edited by stuckmotor; 02-06-2014 at 05:33 AM.

  5. #5
    Super Star Member RoyJackson's Avatar
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    John Deere 4400 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: QUESTION: any problem adding larger front tires?

    Quote Originally Posted by TSO View Post
    It is 4wd, and I thought about that, but what makes me wonder is that you can get different sized rear tires as an option, with the same size fronts.
    Are you sure the front tires would be the same size?
    The tire options (for MFWD machines) on the Deere site indicate specific tire sizes (depending on the type of tire) for their tractors.

    You could check with a dealer...but I do think you'd cause drive train problems.
    Roy Jackson

    "Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one."
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  6. #6
    Elite Member
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    East Coast of Lake Huron
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    Deere, several

    Default Re: QUESTION: any problem adding larger front tires?

    If the front of the tractor is raised higher than the rear. The tractor will be rolling uphill and will therefore use extra fuel.

  7. #7
    Gold Member Recoveryhill's Avatar
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    St. Croix, Virgin Islands
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    Kubota L3700SU

    Default Re: QUESTION: any problem adding larger front tires?

    The distance covered in one complete revolution of front and rear tires on a Four Wheel Dive vehicle needs to remain as specified when the front drive gears were engineered. Go smaller and the drive line will be in a bind trying to skid the front rubber forward. Go larger and the front rubber will be trying to outpace the rear rubber and result in a bind with opposite forces.

    For Example:
    3.1416 x Diameter = Circumference
    Circumference (rolling distance of one revolution) on a 24" tire is: 75.4"
    Circumference on a 26" tire is: 81.7"

    Adding 2" to the diameter would result in the tire traveling 6.3" further for each revolution too much for a drive line that requires a fixed ratio of circumference between rears and fronts. Tire width doesn't matter....within reason.

  8. #8
    Veteran Member
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    Default Re: QUESTION: any problem adding larger front tires?

    Quote Originally Posted by buickanddeere View Post
    If the front of the tractor is raised higher than the rear. The tractor will be rolling uphill and will therefore use extra fuel.
    So, if the rear is higher than the front, could you get by with no fuel?

  9. #9
    Veteran Member TSO's Avatar
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    Quote Originally Posted by RoyJackson View Post

    Are you sure the front tires would be the same size?
    The tire options (for MFWD machines) on the Deere site indicate specific tire sizes (depending on the type of tire) for their tractors.

    You could check with a dealer...but I do think you'd cause drive train problems.
    Yeah, you can also get the rears in 17.5Lx24, which are wider but slightly shorter than the stock 14.9x24. But the front tire size remains the same.
    Massey 1648 Cab - Hustler Z Diesel 66" mower
    2007 F450 Crew - 20' PJ Equipt Trailer
    QA 6ft bucket * 5ft Custom Grapple Bucket * QA Forks * 8ft Rhino Back Blade
    7ft Rhino Box Blade * 7ft LandPride Rake * 6.5ft KK HD Box Disc * Middle buster plow
    WorkSaver SG-26 Stump Grinder * Wallenstein BX42s Chipper * 8ft Ford Brush-Mower
    7.5ft QA snow plow (still under construction)

    345 flawless hrs @ 11/5/14

  10. #10
    Super Member Gary Fowler's Avatar
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    Bismarck Arkansas
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    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: QUESTION: any problem adding larger front tires?

    Quote Originally Posted by TSO View Post
    Yeah, you can also get the rears in 17.5Lx24, which are wider but slightly shorter than the stock 14.9x24. But the front tire size remains the same.
    Since you have both tractor there now, why not measure the rolling distance on both fronts and verify that they are the same or nearly same. They may be wider but no difference in OD. If they are the same, you could even swap them out between the tractors
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

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