Tires and 4wd Lead/Lag - B2150hst/B8200

[NorCalOrange]

The rear tires are the originals from around 1995 and are looking very old with lots of cracks and splits. Despite no cords showing, I'd feel better/safer replacing them given the tractor is used on very steep slopes and hills.

After hours of research and learning about Lead/Lag, I "think" I found what rear tire will make a positive Lead/Lag with the almost new Carlisle front tires.

The B2150 4wd uses the same tires as the B8200 4wd. Kubota supplied a forum member the mechanical ratio specs for the B8200. Since these two tractors use the same tires they must share the 4wd mechanical ratio.

Using the Kubota supplied ratio of 1.691 with the Titan Lead/Lag calculator allowed me to verify if the currently installed Carlisle 6-12 front tires will work with the much needed Titan 12.4x16's.

Per the Lead/Lag Program:

Mechanical Ratio: 1.691
Carlisle 6-12 RC = 68.9
Titan 12x4 RC = 115
Lead/Lag = + 1.31%

Depending on what you read, the lead should be 0 to 3% or 0 to 5% positive.

Please tell me if this is flawed before buying tires. The price of rear tires is insane!!


https://www.titan-intl.com/resources/Lead-Lag-Calculator#

http://www.orangetractortalks.com/forums/showthread.php?t=971&page=2

 

[Dayswon]

Looks good to me. I just did something simular but went with R4's instead. Carlisle 12.4-16 track chief I-3 rear with a Carlisle 5.70-12 track chief front. It gives me a 5.4% lead, which will be fine for my applications. There are several people who have posted a 7% lead with no problems.

 

[SDT]

The rear tires are the originals from around 1995 and are looking very old with lots of cracks and splits. Despite no cords showing, I'd feel better/safer replacing them given the tractor is used on very steep slopes and hills.

After hours of research and learning about Lead/Lag, I "think" I found what rear tire will make a positive Lead/Lag with the almost new Carlisle front tires.

The B2150 4wd uses the same tires as the B8200 4wd. Kubota supplied a forum member the mechanical ratio specs for the B8200. Since these two tractors use the same tires they must share the 4wd mechanical ratio.

Using the Kubota supplied ratio of 1.691 with the Titan Lead/Lag calculator allowed me to verify if the currently installed Carlisle 6-12 front tires will work with the much needed Titan 12.4x16's.

Per the Lead/Lag Program:

Mechanical Ratio: 1.691
Carlisle 6-12 RC = 68.9
Titan 12x4 RC = 115
Lead/Lag = + 1.31%

Depending on what you read, the lead should be 0 to 3% or 0 to 5% positive.

Please tell me if this is flawed before buying tires. The price of rear tires is insane!!


https://www.titan-intl.com/resources/Lead-Lag-Calculator#

http://www.orangetractortalks.com/forums/showthread.php?t=971&page=2

Not sure why one would need to go to such extent to replace tires.

The B2150 HSD was equipped with 24X8.50-12 F and 13.6-16 R Turf tires or 8.3-24 R and 6-12 F R1 tires.

SDT

 

[NorCalOrange]

Nl

Not sure why one would need to go to such extent to replace tires.

The B2150 HSD was equipped with 24X8.50-12 F and 13.6-16 R Turf tires or 8.3-24 R and 6-12 F R1 tires.

SDT

Sounds easy but not all 6-12 F R1's are the same diameter or circumferance. Same with Rears. Cant by the Firestone rears anymore and the Titans are a different cirumferance. One front set of 6-12 R1's I bought were a couple inches taller then the originals. That makes a big differance in circumference and a problem for the drive train. Rather be cautious and correct then break something.

 

[Dayswon]

Not sure why one would need to go to such extent to replace tires.

The B2150 HSD was equipped with 24X8.50-12 F and 13.6-16 R Turf tires or 8.3-24 R and 6-12 F R1 tires.

SDT

Norcal is correct on this, you have to build your tire configuration by the rolling circumstance paired with rim size. My configuration with R4's, the Carlisle 12.4-16 has a rolling circumference of 108.1" while the exact same size goodyears R4 12.4-16 has a rolling circumference of 109.8. The difference of those two adds 1% to my lead/lag ratio. (for the better, would have given me 4.2% lead) however the Goodyear R4 is $175 more ($325 total for 2)

Another variable is our front hubs are 6x115mm while new Kubotas are 6x120mm. So to run current configurations, we would need a 2" spacer/adapter while at the same time keeping the cost down.
Lots of factors when older tires sizes are no longer manufactured, or one tire is the price of a whole set, or radials are now an option for tractors, or the introduction of a new tread (R4's) that meets the gap between AG and turf. 70's-80's only had those two options.

 

[Butch]

The rear tires are the originals from around 1995 and are looking very old with lots of cracks and splits. Despite no cords showing, I'd feel better/safer replacing them given the tractor is used on very steep slopes and hills.

After hours of research and learning about Lead/Lag, I "think" I found what rear tire will make a positive Lead/Lag with the almost new Carlisle front tires.

The B2150 4wd uses the same tires as the B8200 4wd. Kubota supplied a forum member the mechanical ratio specs for the B8200. Since these two tractors use the same tires they must share the 4wd mechanical ratio.

Using the Kubota supplied ratio of 1.691 with the Titan Lead/Lag calculator allowed me to verify if the currently installed Carlisle 6-12 front tires will work with the much needed Titan 12.4x16's.

Per the Lead/Lag Program:

Mechanical Ratio: 1.691
Carlisle 6-12 RC = 68.9
Titan 12x4 RC = 115
Lead/Lag = + 1.31%

Depending on what you read, the lead should be 0 to 3% or 0 to 5% positive.

Please tell me if this is flawed before buying tires. The price of rear tires is insane!!


https://www.titan-intl.com/resources/Lead-Lag-Calculator#

http://www.orangetractortalks.com/forums/showthread.php?t=971&page=2

You are very lucky in finding Lead/lag tires for your machine. When I went to replace the front tires on my 1999 B2410 I quickly found out this size was not readily available from any tire manufacturer. When I went up the command chain at Kubota and they had absolutely were useless as tits on a boar hog. I ended up going with M. E. Miller Tire. They specialize in hard to find tires for just about anything. You can find them on Facebook.

Maybe this may help folks.