Bottom side is child's play; stand tire up - use one tire iron, under edge of rim, pry until shaft is across the tread and then work your way around the rim "tapping" bead off the rim with a 3# hammer, takes 30 seconds or less for anything under 8 ply.

The mini sledge is invaluable; once the top side is off I rarely use more than one iron for the removal of the "back" side and reinstallation of both sides, the hammer takes most of the work out of it.

Jim

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2005 C240 4matic wagon (daily driver)
87 190D - 225K (on loan)
85 190D - 312K (on loan)
2011 Subaru Legacy AWD (Wife's)