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PB Marauder
09-29-2014, 05:02 PM
If I was to purchase aftermarket wheels, would the offset have to match the stock wheel offset of 50mm? What kind of wiggle room is there if any? Maybe 40mm offset? I do know that the bolt pattern must match haha! Thanks for any help!

lifespeed
09-29-2014, 06:53 PM
10mm is nearly half an inch. Ideally you will use the same offset, although a larger offset (https://www.google.com/#q=wheel+offset+diagram) can be compensated with a spacer to make up the difference.

Altering the offset will change the scrub radius (https://www.google.com/#q=scrub+radius), which can have an adverse effect on handling and braking forces on the suspension. Randomly changing the wheel offset is not something I would do if you care about how the car handles and behaves under braking.

ctrlraven
09-30-2014, 07:06 AM
I use 2010 Mustang GT 18x8 wheels for winter use, offset is 44mm.

PB Marauder
09-30-2014, 07:46 AM
Ok thanks for the input. I was looking at those American Racing Torqthrust M's. I think they would look awesome but the offset is 0mm so I'm guessing I couldn't make them work.

ChiTownMaraud3r
09-30-2014, 08:21 AM
I think anything above +35mm, you're fine without them sticking out too far.

There's several calculators out there that will tell you how much over stock a wheel will stick out even with tires, then just go out and measure roughly where the new setup will be. Just search wheel size calculator online.

PB Marauder
09-30-2014, 09:05 AM
Ok so am I correct in assuming that a wheel with these specifications will fit?: Details:
Size: 18x8
Bolt Pattern: 5x120
Offset: +40mm
Backspace: 6.07"
Hub Bore: 72.6mm

lifespeed
09-30-2014, 09:38 AM
Ok so am I correct in assuming that a wheel with these specifications will fit?: Details:
Size: 18x8
Bolt Pattern: 5x120
Offset: +40mm
Backspace: 6.07"
Hub Bore: 72.6mm

That will shift your scrub radius and wheel 10mm outboard.

ChiTownMaraud3r
09-30-2014, 09:39 AM
Negative. You need 5x114.3 as a bolt patern. Otherwise I would say everything else looks good.

PB Marauder
09-30-2014, 10:55 AM
Thanks for the help!

Embassy
10-01-2014, 06:33 AM
http://www.1010tires.com/Tools/Wheel-Offset-Calculator

Logizyme
10-01-2014, 06:07 PM
Ok so am I correct in assuming that a wheel with these specifications will fit?: Details:
Size: 18x8
Bolt Pattern: 5x120
Offset: +40mm
Backspace: 6.07"
Hub Bore: 72.6mm

+1 on the wrong bolt pattern

5X4.5 / 5X114.3 is correct.

Exact offset you are going for will change with wheel width. A wider wheel will require a more positive offset for correct fitment.

You're looking for wheels that are considered "high positive offset" for proper fitment.

If you shop for wheels for a 2005-2009 mustang you'll find the wheels sized to fit ideally.