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Hello everyone.  I am sure that I am not the only one that goes through 'wheel and tyre dimension anxiety' each time they are putting a new project together, but in an effort to hopefully ease my 'wheel and tyre dimension anxiety' a bit (HA - hopefully), I am ordering a tool that I have found online that can be used to calculate offset and also check tyre clearance.  I have no personal experience with using such a tool, but as soon as I figure out how to use it (HA - my 'weakness' is never reading instructions properly), I will post my experience with it.  There are multiple manufacturers of such devices, but until I receive mine and gain some experience with it, I prefer not mention the brand I am going to use.  I do not expect any 'surprises' with it as all the different brands seem to do the same thing, and all seem to do it successfully.  CHEERS from AUSTRALIA.

@MikeSchill posted:

Hi all. New to the Pantera world. Looking to have custom wheels made for my 74 that has gts style fairings on it. I’ve read all 4 pages of info and feel dumber than when I started! Lol. The wheels would be 18x8 and 18x12. I need help with backspacing. Want the deep recessed look in the rear. 0DA0C0A2-6CFC-44ED-9C50-31912EB79720781EC0FE-235E-4306-9777-EAC7DD27E352

Your car has a great stance and those wheels are really nice. What size are they?  

These are made by SIMMONS in AUSTRALIA (simmonswheels.com.au) - this is a 17" version.  They make them in a range of diameter, width and colors.  SIMMONS has been around for many decades and make quality products. I purchased my first set of SIMMONS near on 35-years ago, and they are still going strong on the car I sold.   They also have other designs.

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So I finally had time to pull the wheels and do some measurements. Current setup is 17x9 with 6” backspace (+1” offset)

17x11 with 6” backspace (-1/2” offset).  I’m thinking of upping the to 18x9 and keeping same dimensions due to the 245/35-18 being a little wider tire. The existing setup is pretty close to full turn fender rub about 1/2”    The rears 18x12 with 6” backspace would push the tire closer to flush of fender lip. Can’t really go wider or pull wheel in more because it’s already close to exhaust pipe and 335/30-18 should work. The car has adjustable coil overs on all corners and wilwood disk brake conversion all around.
Do my calculations look correct?

To be clear with builder 62 mm bore and 5x4.50 bolt pattern?

Thanks

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