L3600 DT - what wheel size?

[Nickk]

When I look on Tractor data (usually a pretty reliable site) I see my rim size to be 16" front and 24 inch rears.
The tractor has 15" front and 20" rears on it.
I know older tractors can some times have the wrong rims on them.
Messick has options of 16" and 15".

Questions:
-Being 4 wheel drive I believe the front and rear have to be matched so one engine revolution means the same distance moved on the front and rear?
-I am not sure of the differential gear reductions though.

- What size should my tractor have on it?
-The transmission has such low gears I do not think tire size will impact my power?




Thanks,
The people here are always great and helpful!

 

[North Idaho Wolfman]

The 15" / 20" was offered in 2 tire size sets.
27x 8.50 -15" and 41x14.00-20"
Are a matched set for turf tires, so was
29 x 12.5-15 and 355/80-D20

What tires are you running or want to run?

R1 7.2-16 and 12.4-24

R4 8.3 - 16 and 14.9 - 24
R4 10 - 16.5 and 17.5L - 24

R3 27 x 8.50-15 and 41 x 14.00 - 20
R3 27 x 10.5-15 and 21.5L - 16.1
R3 29 x 12.5 - 15 and 355/80 - D20

 

[Nickk]

The 15" / 20" was offered in 2 tire size sets.
27x 8.50 -15" and 41x14.00-20"
Are a matched set for turf tires, so was
29 x 12.5-15 and 355/80-D20

What tires are you running or want to run?

R1 7.2-16 and 12.4-24

R4 8.3 - 16 and 14.9 - 24
R4 10 - 16.5 and 17.5L - 24

R3 27 x 8.50-15 and 41 x 14.00 - 20
R3 27 x 10.5-15 and 21.5L - 16.1
R3 29 x 12.5 - 15 and 355/80 - D20

I would like to run R4 tread and a 16" rim. I am having a little tougher time finding a 15" tractor rim with the an offset of 3.5". 3.5" is what the rim currently on the tractor measures.

 

[Nickk]

27/8.5-R15 vs 29/12.5-R15 Tire Comparison - Tire Size Calculator | Tacoma World

29/12.5-R15 tires are 1.95 inches (49.44 mm) larger in diameter than 27/8.5-R15 tires and the speedometer difference is 6.7%

www.tacomaworld.com

This site (even though it is for autos) helped me understand the proportional size of front to rear wheels. North Idaho Wolfman's great help it looks like a ratio of 1.5 to 1.45 would be good.

 

[Nickk]

27/8.5-R15 vs 29/12.5-R15 Tire Comparison - Tire Size Calculator | Tacoma World

29/12.5-R15 tires are 1.95 inches (49.44 mm) larger in diameter than 27/8.5-R15 tires and the speedometer difference is 6.7%

www.tacomaworld.com

This site (even though it is for autos) helped me understand the proportional size of front to rear wheels. North Idaho Wolfman's great help it looks like a ratio of 1.5 to 1.45 would be good.

My current set up is not factory the 27-8.50 with the 355-80. These give me a ratio of 1.56. I did see slippage at times with only the front which seemed odd to me. Being direct drive both wheels should be wanting to move the same distance.