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John Deere Tractors Discussion Forum
Show Parts for Model:

Re: 18.4.38 tire on 4020

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larryanderson

07-15-2013 12:16:54
184.21.172.50



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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 .




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4020deereboy

07-15-2013 19:41:51
174.253.160.61



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 Re: 18.4.38 tire on 4020 in reply to larryanderson, 07-15-2013 12:16:54  
How much does it change the working speed of the other gears? Will I lose any horsepower?
Thanks Shaun.



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Tx Jim

07-16-2013 03:21:08
69.35.160.119



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 Re: 18.4.38 tire on 4020 in reply to 4020deereboy, 07-15-2013 19:41:51  
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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.



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