Which size of dual wheels would fit this tractor?

[jackrussell101]

Hi all,

I would like to be able to dual up our JD 3040 and just wondering what size dual wheels would fit it? Would 16.9/R38 be ok? Thank you in advance...

 

[Skimmer]

16.9 would be too small

 

[atlas]

Some 18.4 x 38 stocks or opicos the eyes are there ready for the clamps to hook on to