Backspacking for Idiots (me)????

[DrtyJack75]

Ok, Im looking at these wheels and confused just a bit....

20X9 6-139.7 18C


22x9 6-139.7 25c


Im assuming the 18 and 25 are the offset in MM.....how does that convert to Inches?


I have a 3 1/2 and 5" drop....will these work? And will that 22" with a 25c fill up the wheel well (width wise)

PLEASE HELP! I dont want to rely on some guy at a tire shop just trying to sell me something!

THANKS!!

[lolife99]

Here's a good offset (MM to inches) conversion chart.
I have no idea what the "c" stands for. Chrome wheel?

[OARNGESI]

Originally Posted by drtyjack75

ok, im looking at these wheels and confused just a bit....

20x9 6-139.7 18c


22x9 6-139.7 25c


im assuming the 18 and 25 are the offset in mm.....how does that convert to inches?


I have a 3 1/2 and 5" drop....will these work? And will that 22" with a 25c fill up the wheel well (width wise)

please help! I dont want to rely on some guy at a tire shop just trying to sell me something!

Thanks!!

i could be wrong but i think 6-139.7
is a ford pattern new f150s

[DrtyJack75]

So with that chart does it mean?

18=between a 5.5 and 5.75?
25=6inch back spacing?

Do that sound like it'd fit our trucks? I have a 67 but I have the disk brake conversion from (sh*t Im drawing a blank, great guys down in Central California....not CPP but ??).


yeah that didnt sound right to me either...it came up with the 6x5.5 then when I clicked on the picture that came up...???

[clos69]

Check here http://www.rims-n-tires.com/info_specs

I am showing that a 20x9 with 18mm is a 5.7in backspace and .07of an inch offset...on the 22x9 with 25mm is a 6in backspace with 1in offset. and also 6x139.7 is the same as 6x5.5 bolt pattern...hope this helps

[cerebus]

there is 25.4 millimeters per Inch so that is definately not right.