Tire size on a 400?s rear

Son?s project 400 needs new rear tires. Not flush with cash, he?s looking at 11.5?s rather than 13.6?s. Is that large enough to use all the horsepower in the field? Thinking it?ll look a bit weird.

Anybody have 11.5?s & happy with your decision?
 
Way too small. Someone had put brand new 12.4 x 38 on my JD A. They were too small for that tractor and never looked right at all. I just pulled them off and those 12.4 size will go my Farmall h as that is a perfect size for an h.


My John Deere A now has 13.6 x38 and looks much better. My Farmall M also has 13.6 x 38 and that is a good size for it.


For a 400 which I always thinks looks even bigger than a Farmall M: I would go 13.6 at a minimum and consider 14.9 or 15.5 sizes also.
 
Way too small. Someone had put brand new 12.4 x 38 on my JD A. They were too small for that tractor and never looked right at all. I just pulled them off and those 12.4 size will go my Farmall h as that is a perfect size for an h.


My John Deere A now has 13.6 x38 and looks much better. My Farmall M also has 13.6 x 38 and that is a good size for it.


For a 400 which I always thinks looks even bigger than a Farmall M: I would go 13.6 at a minimum and consider 14.9 or 15.5 sizes also.
 
Way too small. Someone had put brand new 12.4 x 38 on my JD A. They were too small for that tractor and never looked right at all. I just pulled them off and those 12.4 size will go my Farmall h as that is a perfect size for an h.


My John Deere A now has 13.6 x38 and looks much better. My Farmall M also has 13.6 x 38 and that is a good size for it.


For a 400 which I always thinks looks even bigger than a Farmall M: I would go 13.6 at a minimum and consider 14.9 or 15.5 sizes also.
 
No way. It will look like it has pizza cutters for wheels, and it will run slower, and it won't be able to put the power to the ground, and if you weight it down so it will, it will tear the tires up.

Save a little while and put the bigger tires on. Even 13.6's are a little small for a 400, but better than 11.2's.
 

i run 13.6/38 on my M and they center up good on a 36" row. my planter and cultivators are all set up on 36"; however, my 460 has 16.9/38 and there is not much room to spare on a 36" row.

go with the 13.6/38

bass
 
That's why the tread widths are adjustable. There should be a good 8-9" of clearance on each side of a 16.9 tire in 36" rows of corn. A 16.9 tire isn't hardly 16" wide, and you've got 34" of open ground between the rows of corn assuming the stalks are 2" in diameter, which they aren't.

If you're tight on the outside, slide the wheels in. If you're tight on the inside, slide the wheels out.
 

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