I don’t know about a 226, but my 224 has basically no room for more wheel offset toward the hydraulic motor, left rear wheel. Who ever had the chains on for snow blowing, before I got the tractor, wore a groove in the motor casting.
My tires are 23x8.50x12. Don’t know the width of the rim.
I put a set of wider rear rims and tires from a Simplicity found in a garden tractor scrapyard. Direct bolt on, just stick past the outside of the fenders a little. Plus bonus came with wheel weights and they were loaded with antifreeze.