Offset for the 05 mustang?

 

The AFS Mach I's which were made for the 05/06's have a +40mm offset (6.58 backspace).

 

Here are the specs for the Black DD bullitts I just put on:

Wheel Specifications for the 18x9:
Wheel Style:Bullitt
Wheel Size:18x9"
Wheel Backspacing:6.34" (161mm)
Wheel Offset:+34mm (1.34")
Tire Size:255/45-18
Bolt Pattern:5 x 4.5 inch (5x114.3mm)
Fitment:05-07 V6, GT

Wheel Specifications for the 18x10:
Wheel Style:Bullitt
Wheel Size:18x10"
Wheel Backspacing:7.27" (185mm)
Wheel Offset:+45mm (1.77")
Tire Size:285/40-18
Bolt Pattern:5 x 4.5 inch (4 x 114.3mm)
Fitment:2005+ V6 and GT

Maybe that helps.

 

Here is a link to the Tire Rack on line and the Factory Fan Blade wheel specs, they are showing the 18x8.5 Fan Blades as having a 50mm offset as I tried to show you using the calculations in the thread you made the other day.

Finish Shown: Polished w/Clearcoat
Other Available Finishes:
Silver Painted

Size Selected: 18x8.5
Price: $209 (each)
Estimated Availability: In Stock
Recommended Tire Size: 255/45-18
Wheel Offset: +50mm
** Lightweight: 26.5 lbs. **


Additional Specs
Bolt Pattern: 5-114
Finish Warranty: None
Country of Origin: USA
Construction Type: 1pc. LPcast




http://www.tirerack.com/index.jsp