235/80R22.5 is a Michelin size. Equivalent size is 245/75R22.5, however, the 275/70R22.5 is also close.
Look at Load Rating, diameter, revolutions per mile and minimum dual spacing as well as rim size. You can compare various sizes here:
Tire Size CalculatorDual spacing is determined by rim offset, if you measure between the centerline of each of the tires it will give you the dual spacing. (Extend the dashed lines to the tread to see the offset) HDS is half Dual Spacing or rim offset...

Another factor is wheel well clearance...