Aftermarket offset

Z

Zacks Marauder

New member
How many of yall have run a 20x8.5 40mm rim on the front?
Is there any srubing or issues?
I have looked through many threads and cant seem to find out about this offset.
I have put a 38mm on and it seemed to stick out about a quarter of a inch so i sent the rims back 2mm cant be that big of a difference.
 
I have 20X10 wheels on a +40mm offset , ideally +45mm offset would be perfect on a 20X10 wheel , not sure about a 20X8 , and yes 2mm is a big difference.
 
A 40mm offset on a 20 x 8 wheel is not the same as a 40 mm offset on a 20 x 9 wheel nor a 20 x 10 wheel. Member Lifespeed here knows all about 20's and offsets
 
Zacks Marauder said:
U have 10s on the front with 40mm? But how seems like that would be way out there
Click to expand...

I think you have it backwards , the higher the number on a positive offset wheel , the farther inboard it will sit, just fyi the oem Marauder wheels have a +50mm offset.
 
MOTOWN said:
I think you have it backwards , the higher the number on a positive offset wheel , the farther inboard it will sit, just fyi the oem Marauder wheels have a +50mm offset.
Click to expand...

Yea i know about how + and - work and oem is 50 it says on the rim its just i didnt know a mm had that much of a difference iv tried measuring but i guess i suck at it.
 
RubberCtyRauder said:
If you add say a half inch to each side then it changes the offset
Click to expand...

Remember offset , and wheel back spacing are two different measurements , adding material to the inside of a wheel does not change the offset , it changes the backspacing.
 
MOTOWN said:
I think you have it backwards , the higher the number on a positive offset wheel , the farther inboard it will sit, just fyi the oem Marauder wheels have a +50mm offset.
Click to expand...
I was calculating some stuffs a couple days ago, and found the "OEM" wheel specs to be interesting..
Using the specs that have been going around for the stock MM wheel for years, and using 8" for wheel width, and the supposed backspacing of 6.295.

Offset can be calculated using wheel centerline and backspacing.
8/2 = 4
and
6.295 - 4 = 2.295 = 58.293mm???

frppmmrim.jpg


Of course, this is assuming the backspacing is correct, but for a +50mm offset, and keeping the width at 8" the backspacing would have to be 5.9685in. Something doesn't quite add up.
 
Last edited:
ChiTownMaraud3r said:
I was calculating some stuffs a couple days ago, and found the "OEM" wheel specs to be interesting..
Using the specs that have been going around for the stock MM wheel for years, and using 8" for wheel width, and the supposed backspacing of 6.295.

Offset can be calculated using wheel centerline and backspacing.
8/2 = 4
and
6.295 - 4 = 2.295 = 58.293mm???

frppmmrim.jpg


Of course, this is assuming the backspacing is correct, but for a +50mm offset, and keeping the width at 8" the backspacing would have to be 5.9685in.
Click to expand...

That is incorrect , wheel offset is the measurement between the wheel center , and the mounting surface.
 
ChiTownMaraud3r said:
I was calculating some stuffs a couple days ago, and found the "OEM" wheel specs to be interesting..
Using the specs that have been going around for the stock MM wheel for years, and using 8" for wheel width, and the supposed backspacing of 6.295.

Offset can be calculated using wheel centerline and backspacing.
8/2 = 4
and
6.295 - 4 = 2.295 = 58.293mm???

frppmmrim.jpg


Of course, this is assuming the backspacing is correct, but for a +50mm offset, and keeping the width at 8" the backspacing would have to be 5.9685in. Something doesn't quite add up.
Click to expand...

Maybe the rim is a lil larger than 8 inchs but it was easier for them to just put 8inchs instead of 8 point whatever?
 
I didn't determine backspacing. I'm using the value given on that info pic which has been around since forever to determine offset. Look at it again.

Sent from my VS985 4G using Tapatalk
 
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