The standard turf tyres on my B7200 are showing signs of age. The treads are not too bad but the sidewalls have loads of cracks. The standard tyres are:
- Front 20.5x8-10
- Rear 31x13.5-15
When I first bought the tractor a few months ago I knew the tyres weren't great, and I imagined I would rock up to a tyre shop and have a choice of tyres to replace them. Wrong. I can find rear tyres but they are expensive, but couldn't find front tyres.
I wanted something with more grip than turf tyres, but not as aggressive as ag tyres so I settled on skidsteer tyres. Also wanted a good load rating for the loader.
I've ended up with the following tyres:
- Front 23x8.5-12 (RC 68.3")
- Rear 12-16.5 (RC approx 98.9")
It's 4WD so the rolling circumference ratio matters - rear/front = 98.9/68.3 = 1.45. I think I've seen somewhere here that the spec for this tractor is 1.46.
These are both readily available skidsteer tyres here for $200 (rear) and $160 (front).
The next challenge is the rims. I may be able to buy them from Kubota if I sell the house, so I needed another option.
I found two good used 16.5x9.75 bobcat rims for the rear on Facebook marketplace and bought two new bare 12x7 rims for the front. These sizes match the new tyres.
On the rear I'll need to make an adaptor to go from the current hub to match the bobcat rims - this might also double as a wheel weight as I want to keep the tyre width about what it is now.
On the front I'll just need to make a centre to match the front hub and weld it into the bare rim, keeping the tyre centreline the same.
You can never have too many projects. When you get stuck on one there's always something else to work on.
- Front 20.5x8-10
- Rear 31x13.5-15
When I first bought the tractor a few months ago I knew the tyres weren't great, and I imagined I would rock up to a tyre shop and have a choice of tyres to replace them. Wrong. I can find rear tyres but they are expensive, but couldn't find front tyres.
I wanted something with more grip than turf tyres, but not as aggressive as ag tyres so I settled on skidsteer tyres. Also wanted a good load rating for the loader.
I've ended up with the following tyres:
- Front 23x8.5-12 (RC 68.3")
- Rear 12-16.5 (RC approx 98.9")
It's 4WD so the rolling circumference ratio matters - rear/front = 98.9/68.3 = 1.45. I think I've seen somewhere here that the spec for this tractor is 1.46.
These are both readily available skidsteer tyres here for $200 (rear) and $160 (front).
The next challenge is the rims. I may be able to buy them from Kubota if I sell the house, so I needed another option.
I found two good used 16.5x9.75 bobcat rims for the rear on Facebook marketplace and bought two new bare 12x7 rims for the front. These sizes match the new tyres.
On the rear I'll need to make an adaptor to go from the current hub to match the bobcat rims - this might also double as a wheel weight as I want to keep the tyre width about what it is now.
On the front I'll just need to make a centre to match the front hub and weld it into the bare rim, keeping the tyre centreline the same.
You can never have too many projects. When you get stuck on one there's always something else to work on.
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