You'll have a ~1.65% underspeed on your speedo and odo--probably not worth worrying about. This is based on 205/55R16=838revs/mi and 215/50R16=852revs/mi (using Ford formula).
1999 Contour SE Sport MTX75 T-Red/Grey
Audio: Pioneer DEH-7400MP (MP3 CD), Pioneer TS-A6857 front & rear, PPI PCX-250, Infinity Perfect 10.1
Other: cup holders, cargo net, Blizzaks, Potenza RE950s
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