Re: Tire size on a 400?s rear

Brendon-KS

Well-known Member
Location
Goessel, KS
I'd vote for the 14.9's for a 400. This was the tire size used for the Nebraska test so could be
considered "correct". Back then they also ran the tests with the smallest available tires and
these are listed as 11-38 which is the modern 12.4. I agree with you that these would look very
out of place on a 400. My 350 has 13.6's and they look just right for that tractor.
 
I have a Super H. When the original 12.4s gave up I put 11.2s on. They were $200 each cheaper. I hated then,they looked like crap.Almost sent them back. Wish I had....Should have spent the 'extra' $200
 
Have to agree, 11-38/12.4x38 on an H/SuperH; 12-38/13.6x38 on an M/Super M, 13.6x38 or 14.9x38 on a 400,
although I understand the 14.9x38's are VERY expensive. 450 looks right with 15.5x38, they're cheaper
than 14.9's too.
We had 12-38/13.6x38 duals that matched up properly with other 12-38/13.6x38 and 15.5x38 tires. 14.9x38,
the old 13-38 were a taller tire and didn't match up with anything except other 13-38/14.9x38 for duals,
plus 16.9x34 and 15.5x38's match up according to my tire books with some inflation pressure adjustment.
 
we use 18.4's on both an 806 and 856 for planting and spraying. The 806 I can't get them down to center on 30's, so they are a bit wide for them.
 
You should have tons of room with a 16.9 tire on 36" rows. Move the wheels in or out. May have to reverse the rims on the wheels
to get the row clearance you're looking for.
 
With the 560 and double bevel rims you may have to relocate the rims to the other bevels to get the width you need. Swapping them from side to side produces an extreme change of width that you don't get with the older letter series wheels.
 
Don't worry about your tire with on your rows! Most people around here have 30 inch rows and about all the tractors have 18.4s on them. You are good with them tires.
 

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