I had my new tire install on my E90 done at Vex Motorsports in San Jose, but that might be a bit far for you if you live in Sac.
2013 Black Sapphire 135is (526/586)
1995 Oxford Green 530iT + 1994 Alpine White 530i
2009 Monaco Blue 328i - Sold
1990 Calypso Red 325i - Died