i have never paid anyone to do my tires. i do them all myself. just take out the valve core and push down on the tire until it breaks the bead, then use a flat screwdriver or something and take off the tire, then spray the new tire with soapy water then slip it on the rim, then put the valve stem back in and air it up till the bead sets, (no more than like 20psi) and then set the tire pressure. saves you money but can be dangerous