I bought a gotrax and switched to solid tires (bought the solid tires on amazon).
Getting the new solid tires on was super, super difficult and strenuous. You basically have to pour boiling water on the tires to heat them up and then use dish soap, clamps and pry bars to get the tire on. Very difficult. Probably worth it but still...
Also, side note the gotrax is pretty decent but it wasn't really designed to be taken apart. The bolts for the front wheel (for example) are hidden under a glued reflector on the fork. You basically have to break the plastic to get to the bolts.