40mm is the offset for the stock 16 x 6.5" E1 wheel. The 17 x 7" Focus SVT wheel has a 49mm offset.
If the E1 wheel was 49mm I would have had no problems with my 18 x 7.5" wheels with a 42mm offset.
Martin
99 Silver Frost SVT
205/55x16 Goodyear Eagle F1 GS-D3's on stock E1's
EBC Sports front rotors
EBC GreenStuff all around
Pioneer DEH-P3000 AM/FM/CD
4 Pioneer TS-A6813
Sylvania SilverStar 9006 lows
Sylvania 885 50W fogs
DRLs
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