# 10 grain drill tire size

jacks

Member
I have a McCormick International 10 grain drill which I believe is from the 1960's. It is 16x7 with hydraulic lift, fertilizer and small seed boxes. I would like to find out what the original tire size was. I need to use it to plant a pasture grass seed mix this fall and the tires are in poor condition. Thanks for any help.
 
I can't find that model on the IH or Messick's websites, but a dealer parts department should be able to access it, and, likely, it will list tire size.
 
Looks like that drill could have had 6.70-15, 7.60-15, or 7.5-20 tires. Back then it wasn't uncommon to buy a new drill with just bare rims and then mount used car or truck tires so probably anything with the right rim diameter that is reasonably close to these factory sizes should work fine.
 
Mine,same size drill , has 14", 4 bolt rims to use the car tires popular in the 60's . I use whatever high profile tires available free.
 
(quoted from post at 20:50:17 06/09/19) Looks like that drill could have had 6.70-15, 7.60-15, or 7.5-20 tires. Back then it wasn't uncommon to buy a new drill with just bare rims and then mount used car or truck tires so probably anything with the right rim diameter that is reasonably close to these factory sizes should work fine.

Yes. That is exactly how it was done. Very few farm implements came with tires installed. The dealer would specify the size of the wheel based on the most popular tire size for cars at that time, which meant that USED car tires were in abundance.
 
what size is on it now? they had 750x20 inch tires. special tires to prevent compaction. has one rib on each outside of tire. flat inbetween. most have old truck tires on them.
 

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