Go BottomWhat size turf tires to use on JD770 MFWD
 | reno605
Join Date: Feb 2004 Posts: 1 Redwood Falls, Minnesota 
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2004-12-05 101613
Currently have R1's, 6.00-12 on 12x4 rim and 12.4x16 on 11x16 rim. Like the R1's except on lawn. Would love to have set of turfs for summer use. Manual has too many choices without enough detail for me to determine what size turfs on which rims. Have also considered R4's but yet be able to find R4 for front in 6.00-12. Thanks in advance
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 | DRankin
Join Date: Jan 2000 Posts: 5116 Northern Nevada 
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2004-12-05 101633
You can't get there from here. The only tractor tire I have found that will fit a 12x4 inch rim is the Ag tire you already have. If you want to install turfs or R-4's you will need a much new, much wider front rim.
All is not lost though. I had the same issue with my first tractor, a JD 4100 GEAR. After careful study, I figured out how to use the existing rims with kinder and tires.
I ended up with an all season 155-12 radial on the front and a 245/75-16 radial M&S on the rear.
That said, I have a set of R-4s sitting in the shed from my 4115. The fronts are still mounted on rims. I don't know if your tractor has the same front bolt pattern as my 4115 though.
LATER ENTRY: I found a pic of a 770 on the net and we definitely do not have rims in common. The is some very good data on the Firestone Ag web site that tells you how to calculate the gear ratio between front and rear axles. Once you know that it is pretty easy to mach up a set of car/truck tires. ....
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| jphamel
Join Date: Jan 2011 Posts: 4 oklahoma
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2011-01-03 176187
When you figure out what is going to work for you and is cost effective, could you please let me know what you came up with. I just purchased a 770 with R-1 ag tires and they're tearing up my lawn just hauling wood to the house so I know that I'm going to have to change out my tires when it comes time to mow this summer. If I find something out I'll let you know too. My neighbor put a set of Chinese made turf tires on his, so I'm going to check on that price also. THANK YOU!!! ....
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| jphamel
Join Date: Jan 2011 Posts: 4 oklahoma
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2011-01-03 176188
When you figure out what is going to work for you and is cost effective, could you please let me know what you came up with. I just purchased a 770 with R-1 ag tires and they're tearing up my lawn just hauling wood to the house so I know that I'm going to have to change out my tires when it comes time to mow this summer. If I find something out I'll let you know too. My neighbor put a set of Chinese made turf tires on his, so I'm going to check on that price also. THANK YOU!!! ....
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 | kthompson
Join Date: Oct 2005 Posts: 5275 South Carolina
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2011-01-04 176202
JP, welcome to TP. No idea if you will get feedback as that was posted in 2004.
Not saying turf tires are not better for a lawn but I have used ag tires on lawn and had little issue with mine. Be sure you are not in four wheel drive, don't turn very sharp and if lawn is wet stay off. As to hauling wood were you pulling a trailer for that would also cause more need for the tires to dig in compared to driving over it with mower might. ....
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| jphamel
Join Date: Jan 2011 Posts: 4 oklahoma
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2011-01-04 176216
I'm not pulling a trailer, and even when I'm driving across the lawn with the loader off the tractor, the tires are making some pretty deep indentions in my lawn. If anyone has a 770 or 790 4x4 with turf tires and are looking for a tire that's more aggressive, I'd be interested in swapping my ag tires for a set of turf tires. My tractor only has 370 hours and is a 1998 model so my tires are in good condition and would like some in the same condition or better. If someone would have a new set on rims, I'd be interested in purchasing them also. THANKS!!! ....
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| No1Jackson
Join Date: Mar 2012 Posts: 2 Northern Illinois
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2012-03-02 182617
13.6x16 turf will fit on a 11x16 wheel ....
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