6200 vs 7200 tires AGAIN: Kubota Review  -- Kubota Tractors Discussion Forum and Review 6200 vs 7200 tires AGAIN: Kubota Review -- Kubota Tractors Discussion Forum

  parts   |   manuals   |   discussion   |   photos   |   podcast   |   reviews   |   specs   |   dealers   |   classifieds   |   contact   |   faq   |   myProfile   |   home          Login Now | Sign Up


FAQ:   What is a tractor?

Forum Index

Kubota Tractors
  Kubota News
  Kubota Price
  Kubota Review
John Deere Tractors
  John Deere News
  John Deere Price
  John Deere Review
New Holland Tractors
  New Holland Tractor Price
  New Holland Tractor Revie
Other Tractor Brands
  Articulated Tractors
  Belarus
  Bobcat Tractors
  Case
  Cub Cadet
  Hinomoto
  Kioti Tractor
  Long
  Massey Ferguson
  Mitsubishi
  Other Tractor Brands
  Other Tractor News
  Shibaura
  Yanmar Tractors
Lawn and Garden Tractors
  Craftsman
  Cub Cadet Garden
  John Deere Garden
  Kubota Lawn Garden
  Other Garden Tractors
  Simplicity
  Toro Wheelhorse
  Ventrac Lawn Tractors
Antique Tractors
  Allis Chalmers
  Case David Brown
  Farmall IHC
  Ford
  Ford 9N 2N 8N
  Fordson
  Harry Ferguson
  John Deere Older
  Massey-Harris Ferguson
  Minneapolis Moline
  Oliver Cletrac Cockshutt
  Restoration
  Tractor Pulling
Tractor Attachments Implements 3ph
  Back Hoe
  Field Mowers Brush Cutter
  Grooming Mowers Finish Mo
  Loaders
  Snowblowers / Snow Plows
  Tillers and Ploughs
  Tractor Implements
  Trenchers
  Wood Chippers 3PH
Tractor Maintenance
  Diesel Fuel Lubrication E
  Tractor Engine Repair Reb
  Tractor Tires
Utility ATV
  All Terrain Vehicles
  John Deere Gator
  Mule Utility Vehicles
General Tractor
  Farming Ranching Agricult
  Photo Contest
  Size Tractor Needed
  Tractor Projects
  Tractor Safety
  Welding
Chinese Tractors
  Jinma Farmpro Agracat
  NorTrac Tractors
  Other Chinese Tractors
Cars
  All Brands
  Audi VW
  BMW
  Car Tires and Maintenance
  Chrysler
  Exotic, Sports, Racing
  Ford Cars
  General Motors
  Honda
  Hyundai
  Mercedes
  News
  Nissan
  Subaru
  SUV and Trucks
  Toyota Cars
Trucks Trailers
  Chevy Pickup Trucks
  Dodge Pickup Trucks
  Ford Pickup Trucks
  Toyota Pickup Trucks
  Chevy Pickup Trucks
  Dodge Pickup Trucks
  Ford Pickup Trucks
  Toyota Pickup Trucks
Home Building
  Alternate Electric Energy
  Barns Pole Barns
  Buying Ranch Farm Acreage
  Carpentry
  Contractors
  Electric
  Excavation
  Moldings Finish Trim
  Other Home Building
  Pellet Stoves
  Plumbing
  Wood Stoves
Tools
  Electirc Power Tools
  Gas Power Tools
  Generators
  Shop Tools
  Techniques Howto
Landscape
  Flowers Shrubs Garden
  Golf Course Maintenance
  Irrigation Systems
  Landscape Design
  Landscape Lighting
  Landscape Maintenance
  Lawn, Turf, and Grass
  Vegetable Gardening
Construction
  Caterpillar
  Komatsu
  Wheel Loaders
Current Events Health Happiness
  Current Events
  Dogs and other Pets
  Electronics And Computers
  Food
  Health
  Just For Fun Off Topic
  Movies Music Games
  Personal Finance Investme
  Sports Outdoors
Tractorpoint Site
  Member Photos
  Site Members
  Website Operations Howto


New As Posted | Active Subjects



Click to Post a New Message!

Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

Page [ 1 ] | 2 | | Next >>
Reply | Pop Up Window Reply | Add PhotoAdd Photo
 04-09-2003, 15:00 Post: 52859
John Fundy
2003-04-09 15:00:50
Post: 52859
 6200 vs 7200 tires AGAIN

Gentlemen,

Thanks for all the expertise. What I don't understand is this. The B6200 manual list the correct turf tires as front 20.5X8-10 and rear as 29x12-15. However, the same manual lists two sizes of turf tires for the 7200 as either (1) front 20.5X8-10/rear 29X12-15 OR (2) front 20.5X8-10/rear31X13.5-15. Note in both cases the fronts are the same, but the 7200 supposedly can handle two different rear sizes. My question: Why is it okay for the factory to list two different rear tire sizes for the B7200, but not the B6200? Apparently I'm missing something, hence, your help. One more point: As an ag tire wears, it is very likely to lose 2" on the diameter (one inch per side-this would be a bald tire) Why is this okay?


PS: Hey murf,good to hear from ya! Hows the "L"?

John Fundy






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-09-2003, 16:32 Post: 52861
WillieH



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: New England
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 543

5
Filter by User
 6200 vs 7200 tires AGAIN

John -
This is why I was able to bump up from a 20.5 to a 23 on the front...and up on the rears abit. Staying in the ratio window allows you to do just that. I have said for many years already, exactly what you just questioned...the tire wears down hence losing circumference size...what happens to the ratio? Some will argue that the rears and fronts will wear at the same rate. Not necessarily. Hence the ability to have different sized tires, still matching within a design window of size acceptability.

I believe that the 31's in the rear, and the 20.5's in the front, will be noticeable on the engagement in and out of 4wd. This will, I believe create a difficulty on the fly for engagement as well as disengagement. Your gonna be operating at the far end of the front size spectrum, matched with the 31 rears.

Willie H.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-09-2003, 19:18 Post: 52874
DRankin



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Northern Nevada
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5105

4
Filter by User
 6200 vs 7200 tires AGAIN

Man, you guys are really making me do my homework.

Here is the answer.

By roughly doing some of the math on this web site, it is theoretically possible to match up the same 20.5 inch tire to a "big" 29 inch rear or a "small" 31 inch tire and not get out of the ratio window.

My 4100, with it present tires, gets 1.45 front tire rotations to 1 rear wheel rotation in two wheel drive.

In 4wd, with the diff/lock engaged the ratio goes up to 1.495 to 1, or about a three percent "overdrive" for my front tires. Firestone says anywhere between 0 and 5 percent is acceptable, so I am right within range.

I think I have a lock on this concept, so holler if you have questions.






Link:   Click Here 

Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-09-2003, 20:41 Post: 52886
WillieH



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: New England
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 543

5
Filter by User
 6200 vs 7200 tires AGAIN

This is starting to sound a lot like the B vs. BX dilemma a few weeks back...

Mark, I agree with what you have posted from Firestone, however, I would think that the real critical element would not be from what appears to be a tire wear standpoint as much as a mechanical standpoint that Kubota designed into the gear ratios for proper operations. Maybe I am looking at something totally different than everyone else is, but how can any tire maker stand firm and tell a consumer how to set up a tractor, or any other vehicle, for proper mechanical function?

We have already established, and proven that the revolution ratio between front and rear, must fall into a particular window...that's a given, or damage will be had to the drive line. The confusing element, in which I think we all will agree, is the ambiguity that, in this case, orange applies from one unit's text to another. If, as John has pointed out, all of these tractors in question utilize the same tire sizes, front and rear, with or without a wear off factor, they "should" all work on any or all of the tractors in doubt, relative to what orange writes.

In the past, I have sat down with the calculations, and sized out tires/wheel sets for fronts and rears to work properly on 4wd's. Still doing it the same today as I did many years ago - The problem...potentially a slanted eye on the other side of the pond, that fell asleep while documenting text to cause confusion.

Willie H.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-09-2003, 22:18 Post: 52889
Morgan



Join Date: Jul 2003
Location: Albany, NY
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 126
 6200 vs 7200 tires AGAIN

Hey if your front/rear diameter ratio is not exactly to specs and you're going to be working in loose soil or mud or gravel it won't matter, the tires will slip in the dirt and make up the slack. Just don't go on asphalt. No interstate travel. Off road only.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-10-2003, 08:03 Post: 52910
DRankin



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Northern Nevada
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5105

4
Filter by User
 6200 vs 7200 tires AGAIN

Willie, I have documentation from Deere and Kubota that they set the gear/tire ratios to run fast on the front axle.

The only difference between them and Firestone is Firestone says how fast the front axle should run and they describe how to calculate it.

My 4100 came with Firestone/Bridgestone tires, and the numbers I am crunching are right in line with what Deere posts. I feel much more comfortable now matching tires front and back and having a way to see if I am doing it correctly.

BTW, I do believe the front tires would wear down faster and change the ratio, but I have also noticed that the front tires are set up toward the high end,(+5 percent)when new. As they wear down that percentage drifts down, toward zero.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-10-2003, 08:26 Post: 52912
WillieH



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: New England
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 543

5
Filter by User
 6200 vs 7200 tires AGAIN

John Fundy -

This has gotten way off track...the fact is, as "great" as documentation is, and as much of it as there is, the bottom line is that the 31's in the rear would really be making the fronts spin at the higher end of the "designed" operating window. Realize the ease of engagement / disengagement now, then put the 31's on and realize the e / d then. You'll see the difference first hand. Point being as I have said earlier, as Morgan said earlier, and others will agree, if you have a situation where undue stress is applied from the slight mismatch of tire size ratio, so long as you are operating in slippery / greasy / loose surface, the stress will be absorbed in the slippage of traction. Just remember to disengage when back on the highway!

Willie H.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-10-2003, 09:46 Post: 52924
DRankin



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Northern Nevada
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5105

4
Filter by User
 6200 vs 7200 tires AGAIN

I don't want to start a urination olympics here, but I think Willie made a typo.

The taller rear tires would push the front tire rotation closer to a neutral balance and the smaller rear tires would tend to let the front tires run a little faster.

The disengage advice on hard surfaces is good advice for any 4wd tractor of any make and model with one exception: braking.

You may encounter a situation where keeping it in four wheel drive is the only way to achieve the braking power you need pulling a heavy load downhill or at transport speeds. That alone should give you the incentive to run the tests listed on the Firestone website to make sure everything is balanced.

It seems the overall gearing on your Kubota is very similar to my 4100. I have 20.5 inch tires on the front right now and 29.75 inch tires on the rear. Testing proves they are a +3 percent.

These are actual measurements, not numbers printed on the tire. In fact, my experience has been that tires are almost never the size printed on the sidewall.

I would bet that the 31 inch tires are shorter than advertised and may match up well with a "true" 20.5 inch front tire. The Firestone test and a tape measure applied to the proposed new tires will give you the info you need to make a quality decision.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-13-2003, 22:23 Post: 53089
WillieH



View my Photos

View my Photos  Pics
Join Date: Feb 2003
Location: New England
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 543

5
Filter by User
 6200 vs 7200 tires AGAIN

Hey John Fundy...

Are you ready for ONE more reply concerning the tires?
As YOU asked from the gitgo, tire size compatibility from a B7200 set vs. a B6200 that you have, and manuals for.

The B5200,6200,7200 all accept the same sizing, period.
Your questioning about the tire size 31x13.5x15, will it work? YES!!!! It will work just fine. I put a pair on the rear of my B5200 just to make sure. No mismatch at all. In fact as, I believe Art pointed out, most of the B series units, with exceptions such as the B20,21,22,4200,8200,9200, all make use of the same size chassis, same gearing, same tire sizing. To go one step farther, even some of the mechanicals are totally interchangeable of the drive line.

Turf sizes (fronts/rears): 20.5 X 8 X 10 / 29 X 12 X 15,
20.5 X 8 X 10 / 31 X 13.5 X 15,
R4 sizes (fronts/rears): 20.5 X 8.5 X 10 / 10 X 16.5,
21.5 X 8.5 X 10 / 10 X 16.5,
23 X 8.5 X 10 / 12 X 16.5 These are the most common. The R4 sizes are not listed in the manuals as you may have deduced. However all work with thier respective tire size "mate" and all have the same bolt pattern for rear wheels, from 1976 to present...six lug with six in. ctr's. The fronts changed from four lug to the six lug with your B5200/6200/7200 series orange, and are still in use today on various models.

Willie H.

P.S. - Mark H.- Typo, not at all. If you apply a larger tire in the rear, without changing the tire size in the front, this change will force the front tire to engage in a higher number of revolutions than before to satisfy one revolution of the larger rear size tire. Hence spinning the front tire faster, (more revs), to achieve one full rev of the rear. This is a simple law of physics. In fact, the basis for achieving more power in low range gearing...one is essentially, changing the gear ratios by changing a mating gear size, whether it be larger or smaller than that of a given fixed gear size, to achieve either more power or less power.
'nuff said! Let's Move On!






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
 04-13-2003, 22:50 Post: 53091
DRankin



View my Photos

View my Photos  Pics
Join Date: Jan 2000
Location: Northern Nevada
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5105

4
Filter by User
 6200 vs 7200 tires AGAIN

I also think the tires as described will work.

I have a different physics book, apparently.

Maybe we are saying the same thing, Willie, in different words. Like you I have done a lot of research and experimentation.

I have just replaced the tires on my 4100 and the numbers I have used here are borne out in the real world.

But as you have pointed out, we have beat this to death.
See you on the next thread.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us |
Reply | Pop Up Window Reply | Add PhotoAdd Photo


Page [ 1 ] | 2 | | Next >>

Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

Thread 52859 Filter by Poster:
Art White 2 | DRankin 4 | John Fundy 1 | Morgan 1 | WillieH 5 |

 (advanced search)

Picture of the Day
ford15000

Cub Cadet - Cub Cadet 5254 4Wd Driveline Clunking Noise
Cub Cadet 5254 4Wd Driveline Clunking Noise


Unanswered Questions

Belarus 825 - needs a new clut
Drain Cock
Need more hydraulic flow for s
HINOMOTO HB 501
Belarus 420A - Problems bleed

Active Subjects

460 Long hyd leak
460 axle
Key will not start engine
6x4 engine rebuild vsHarbor Fr
Things we say and what do they
The Plus and Minus of Ignoring
Looking to buy a New Pickup Tr
Need more hydraulic flow for s


Hot Topics

Tractor Category 1 2 3 Hitch s
Duerr hp 678 Chipper replaceme
Gator 620i gas in engine oil
KUBOTA Tractor Trouble Free Qu
Gator 6x4 Overheating problem
Duerr hp 678 Chipper Manual
Adjusting 7308 Pressure Relief
Long 460 hydraulic problem


Featured Suppliers

Mountain Creek Labradoodles
      MountainCreekLabradoodles.com





New Forums on Gun Sport Shooting and Hunting -- BarrelPoint.com  New Forums on Horses ManePoint.com
Talk Horses at ManePoint
Hunting + Gun Sports at BarrelPoint



Most Viewed

+ Kubota AT70s Rear Tine Tiller
+ Kubota HST GST Shuttle or Gear Transmission
+ Best Boom Mower for Kubota B2710 Tractor
+ Definition of Tractor Loader Breakout force
+ Kubota B3200 vs JD 2720
+ New Kubota L3240 First Look Review
+ Kubota Transmission Fluid SUDT
+ Kubota BX2230 VS kIOTI CK20HST
+ KUBOTA Tractor Trouble Free Quality
+ kubota bx25 vs john deere 2720

Most Discussion

+ How to match Truck to Trailer
+ New Kubota L3240 First Look Re
+ Kubota Number 1 in Compact Tra
+ KUBOTA Tractor Trouble Free Qu
+ Source for after market produc
+ 3-Point Quick Hitch
+ B 7100 ST - Making the Leap
+ Kubota Transmission Fluid SUDT
+ Kubota vs John Deere Compact T
+ L3130HST vs JD4310Hydro HELP

Newest Topics

+ Kubota B2301 vs Deere 2025R vs Mahindra Max24
+ 5040 shear on my PTO shaft
+ Kubota B7100 HST Flipped Will Not Move
+ Kubota b7100-hst
+ B2601 vs bx1800
+ 2000 B2710 I need a loader dealer wants over 4K an
+ Upgrading the Factory 145amp Alternator to 40 Amp
+ Kubota BX2750 Snowblower Fan Shear Pin Alignment
+ Size Kubota for Homeowner Use
+ I need some OEM Quality decals for a B7500 DT-TLB
















Turbochargers for Tractors and Industrial Machines
Cab Glass for Tractors and Industrial Machines

Alternators for Tractors and Industrial Machines
Radiators for Tractors and Industrial Machines

Driveline Components for Tractors and Industrial Machines
Starter Motors for Tractors and Industrial Machines