pull your wheels off, remove the centre cap and they are sat their, most models are adjustable so a quick turn and they nip up well. put it back together and your done, about 30 mins to do both sides.
however if you need to change them it takes a bit longer but its easy to do grab your self a haynes manuel, cup of coffee and your toolbox and send a few hours having a play.
frontera man can do the can can, July 2011