I have an old 3020 gas model John Deere I was wondering if it's worth to put dual rear wheels on it and if so what do I need to put dual tires on the back?
Need for dual wheels is determined by the implement that your intending to pull. There are 2 different types of dual wheels(axle & clamp-on). Back when I plowed I put axle mount dual wheels on my JD 4255 when I utilized a 22' 3 pt field cultivator mainly for added tractor stability when raising cultivator in turns.