all my hpi 2.2wheels get boiled regularly some have had 5/6 wheels on em ive found useing PROPPER zap ca means you get a decent glued tyre and it doesnt take much boiling either.
what i do is:
deep side frying pan
stick atleast two wheels in and SQUEEZE the air out and suck the water in
leave it to propperly start boiling
the get a wheel out chuck a teatowel on it and with the end of a wooden spoon i massage the tyre off the rim
its worked for me everytime
