Offsets, Backspace, and other wheel info

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

EricNorton

New Member
Joined
Oct 26, 2021
Messages
18
Reaction score
6
Location
Mi
When you say 4 inches of backspacing what does that mean in relation to offset on rims? I watched a few videos and can't figure out how to convert it but found a chart and it seems like it shows you have 0 mm offset would that be correct? https://www.wheelspecialists.com/wheel-specs
 

JRB

Full Access Member
Joined
May 27, 2021
Messages
263
Reaction score
263
Location
WPB, Florida
Look through the drop down menu's on this site, it has both an offset calculator and offset converter, aside from the tire calculator

 

1ino

Member
Joined
Nov 9, 2023
Messages
31
Reaction score
16
I would like to get an offset to make the tires at least line up with the outside of fender flares
My liberty is a 2002, stock height I have no intention of lifting, mayb a slightly larger tire, a little wider.
Does anyone know what offset I should look for that will work for me?
 

Liberty For All

New Member
Joined
Dec 19, 2008
Messages
25
Reaction score
9
Location
NORCAL, USA
I would like to get an offset to make the tires at least line up with the outside of fender flares
My liberty is a 2002, stock height I have no intention of lifting, mayb a slightly larger tire, a little wider.
Does anyone know what offset I should look for that will work for me?
I use steel wheels from 4WheelDriveParts online. I recall they may be 3/4inch offset and they look great.
 

edward678

New Member
Joined
Oct 14, 2021
Messages
14
Reaction score
2
Backspace to Offset Conversion Chart

The table below is a quick reference for finding offset- pick the rim width and follow the row over to the backspace of your wheel.
offset.gif


Bolt pattern or lug pattern or bolt circle is determined by the number of bolt holes and the bolt circle diameter.

Hub Diameter or center bore is the hole at the center of the wheel.

Rear spacing or back spacing is the distance from the backside of the wheel mounting pad to the outside of the rim flange.

Offset: The distance from the centerline of the wheel to the mounting surface of the wheel.

Negative offset: When the back of the bolt pad is closer to the inside of the wheel; when mounting surface is inboard of the rim centerline.

Positive offset: When the back of the bolt pad is closer to the street side of the wheel; when the mounting surface is outboard of the rim centerline.

Bead-Loc A device which captures the tire bead between it's flanges, usually secured by bolts to keep tire bead from dismounting. Usually used in dirt circle track or off road applications where low tire pressures are used and hitting ruts or other vehicles are common. Left: An example of a Bead-Loc wheel

Info on Stock Wheels:

Bolt Pattern: 5x4.5" or 5-114mm
Backspace: 5.5" (might be a hair larger than this actually)
Offset is 41mm ( I know the chart says 38, but I found 41 from a tire vendor that said the factory wheels are 41 )
Wheel size is 16 x 7
Stock Tire Size ranges, but 235/70R16 is most common.


If anything seems wrong please correct me.

Bennett
Will 2005 5x4.5 high offset from 2005 Mitsubishi Endeavor fit my 2005 Liberty with stock suspension?
 

AngriezJeep

O noes! Jeep haz major ANGRIEZ!!1
Joined
Mar 22, 2024
Messages
21
Reaction score
10
Location
Denver, co
....:favorites68:
Just when I thought I had this stuff all figured out



now I'm really confused.
:emotions122:
If the "backside of the wheel mounting pad" is the center that mounts against the hub.
The "oustide of the rim flange" is the curb side of the wheel.

Doesn't the wheel spacer (between the hub and wheel) increase the distance?

.........Maybe I'm just overthinking this....
If I under stand correctly: the offset for visualization is how far it sticks out towards the inside of your vehicle from a certain point (let's just say the hub for this example). So if the backspace is 4.5 inches, the edge of the rim sits 4.5 inches INSIDE the wheel well after the hub, making it closer to the vehicle. Hence the term Backspacing (it's at the back of the rim). Putting a wheel spacer pushes the rim towards the OUTSIDE, therefore REMOVING backspacing.

Make sense?

Visual:
4.5" backspace
|
|/
[Edge of rim]<----------[hub]

3" backspace 1.5" spacer =4.5"total
|. |
|/. |/
[Edge of rim]<-------[hub]{---}
 
Last edited:

edward678

New Member
Joined
Oct 14, 2021
Messages
14
Reaction score
2
If I under stand correctly: the offset for visualization is how far it sticks out towards the inside of your vehicle from a certain point (let's just say the hub for this example). So if the backspace is 4.5 inches, the edge of the rim sits 4.5 inches INSIDE the wheel well after the hub, making it closer to the vehicle. Hence the term Backspacing (it's at the back of the rim). Putting a wheel spacer pushes the rim towards the OUTSIDE, therefore REMOVING backspacing.

Make sense?

Visual:
4.5" backspace
|
|/
[Edge of rim]<----------[hub]

3" backspace 1.5" spacer =4.5"total
|. |
|/. |/
[Edge of rim]<-------[hub]{---}
Absolutely, thanks
 
Top