18.4.38 tire on 4020

4020deereboy · Jul 14, 2013

Can somebody post pics of there 4020 with 18.4.38 rear tires thanks shaun

Tx Jim · Jul 15, 2013

Hugh McKinney · Jul 15, 2013

I don't have a pic handy but on our 1967 4020 with cab, we found that when we went from duals to 18.4 x 38's, that the larger tires would not clear the fenders on the cab. Had to go to 18.4 x 34's. Just sayin'.

rick deere · Jul 15, 2013

I think they are way too big, and I have a 4020 lp with them on it and 20s on the front but you can see were your going good.

4020deereboy · Jul 15, 2013

Jim thanks for the pic what size fronts are you running ?

larryanderson · Jul 15, 2013

I dont have a picture handy but they were an option in 71/72 along with the 4320 type fender.The plus is they will run well over 20MPH the minus is they are taller to get on and fender clearance is minimal but will work.My personal preference is 16.9x38 or 18.4x34 but both sizes are hard to find excellent used and 18.4x38 seem to be easy to find .

Tx Jim · Jul 15, 2013

(quoted from post at 15:14:45 07/15/13) Jim thanks for the pic what size fronts are you running ?

The tractor in photo is my neighbors and I think it has 10.00X16 frt tires.

4020deereboy · Jul 15, 2013

How much does it change the working speed of the other gears? Will I lose any horsepower?
Thanks Shaun.

4020deereboy · Jul 16, 2013

Thanks for the reply almost looks like a guy could run 1100
16 tires with the 18.4.38 ?

Tx Jim · Jul 16, 2013

(quoted from post at 22:41:51 07/15/13) How much does it change the working speed of the other gears? Will I lose any horsepower?
Thanks Shaun.

Larger diameter tires will require more engine torque when pulling hard. Back when 4020's were new a lot of 4020's in my area were sold new with 18.4X38's to peanut farmers operating in sugar sand.

18.4.38 tire on 4020

4020deereboy

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