Question about tire sizing. My new-to-me 4WD Satoh Buck has 8-18 rear tires and 5-12 front tires, and those seem to be incredibly rare sizes, especially the rear. There is very little information about them and there seems to be not a lot of options in that size - even Rimguard's ballast fill calculator which claims to have over 2200 sizes in the database does not have 8-18.
I understand that due to the 4wd system I need to keep the ratio of front to rear size the same. But I am just wondering if there is another size that is equivalent (with a modern naming scheme or something), or if there is something else I'm missing, or if these are just truly a very rare and weird size.
The reason I ask is that I would ideally like to upgrade to either an R4 or R14 style. I need more traction than turf tires provide, but would like to be able to gently drive around on my flat lawn without tearing it up. If anyone is able to point me in the right direction, it would be much appreciated, and thanks in advance.
I understand that due to the 4wd system I need to keep the ratio of front to rear size the same. But I am just wondering if there is another size that is equivalent (with a modern naming scheme or something), or if there is something else I'm missing, or if these are just truly a very rare and weird size.
The reason I ask is that I would ideally like to upgrade to either an R4 or R14 style. I need more traction than turf tires provide, but would like to be able to gently drive around on my flat lawn without tearing it up. If anyone is able to point me in the right direction, it would be much appreciated, and thanks in advance.
