Casey,
If you have 8.25 x 20" tires the exact replacemant in width and diameter is a 9.00 x 22.5" tire. The Tubeless 22.5's were made to be the replacements for the Tube Type 20".
You won't have any speedometer issues as long as the rear tires stay close to the same diameter.
Does the LCF Hood still have the emblem attached...what year is it?
Mike B
