backspacing, befor i order from B.A.D.

offset is esay to calculate...


fisrt take the width of the rim and add an inch.

then take the offset (+20 for example) and convert it to inches. 20mm=0.787"

then you add that to the first value you calculated( if its a 9" rim you would add an inch to make it 10" and when divided by 2 you would end up with 5) if your half rim value was 5 then your back spacing would be 5.787"


if you have yout back spacing and you want to calculate your offset you can work backwards
and find the difference between your back sapcing and the half rim value ( ex. if you had 6" BS and half of the rims was 5" your offset would be 1" )


you can then take the inch value and go to google and type this as a search

1 in to mm
and it will convert it

you can also type 20 mm to in and it will do that as well.