I own a bx1870. Which I now know should have tire sizes as follows...16x7.50-8 fronts and 24x12-12 rears, but it was sold to me with 18x8.50-8 fronts and 26x12-12 rears. No big deal except that the fronts contact the fel mounts when turning. I tolerated the issue but now one of the fronts has failed (unrelated to the contact issue). So my question is can I put 16's on the front and keep the 26's on the rear without destroying the drive train? I know it's a big no no on 4x4 automobiles but what I don't know is how it relates to these tractors. It is never operated on asphalt so there will always be slippage. Anyways I am fairly sure what the consensus will be, but I thought I would ask. This is my first post on here. Thanks to all in advance.