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Black Red '90 · 02-10-2021

You description seems to match my understanding. Here's the math I used:

11" = 279.4 mm
center line = 139.7 mm
center line +36 = 175.7 mm (inside) 103.7 mm (outside)

12" = 304.8 mm
center line = 152.4 mm
center line +48 = 200.4 mm (inside) 104.4 mm (outside)

The +48 would "poke" out just 0.7 mm, or 0.03 inches.

02-10-2021	#3
Black Red '90 Join Date: May 2018 Location: Virginia Posts: 79	Re: Correct Offset for 18x12? You description seems to match my understanding. Here's the math I used: 11" = 279.4 mm center line = 139.7 mm center line +36 = 175.7 mm (inside) 103.7 mm (outside) 12" = 304.8 mm center line = 152.4 mm center line +48 = 200.4 mm (inside) 104.4 mm (outside) The +48 would "poke" out just 0.7 mm, or 0.03 inches.