DIY: Quick 'n Easy Wheel Offset Measurement
#1
04-21-2012, 09:29 PM
DIY: Quick 'n Easy Wheel Offset Measurement
Another installment to the gShack.org Quick 'n Easy series 
For full post with photos, please visit the site:
http://gshack.org/?p=323
Many of us have come across threads online where people are selling wheels only to tell you they don’t know the offsets. Or, perhaps, you yourself are in that situation. This guide will make you a wheel offset measuring guru in practically no time at all!
Step 1:
Place your wheel on a clean flat surface, face down. I highly recommend a clean sheet here to protect your wheels face.
Step 2: (Note: You’ll get a more accurate measurement if the level sits on the lip, not the tires sidewall)
Measure the height (width) of your wheel from the floor (face/outer lip) to the top (inner lip.) An easy way to do this is to rest a level at the top then measuring to the lowest point as shown in the picture.
Take down this #, label it as “A”
Step 3:
Measure the distance from the hub to the same point on the level. Jot this # down as “B”
Step 4:
Using the formula Offset=B-(A/2), we can now determine the offset.
In the photo samples:
A = 295
B = 186
Offset = 185-(295/2)
Offset = 37.5mm
*Numbers are rounded off, the sample is not meant to be an accurate #, but to demonstrate how to perform the measurement.
For full post with photos, please visit the site:
http://gshack.org/?p=323
Many of us have come across threads online where people are selling wheels only to tell you they don’t know the offsets. Or, perhaps, you yourself are in that situation. This guide will make you a wheel offset measuring guru in practically no time at all!
Step 1:
Place your wheel on a clean flat surface, face down. I highly recommend a clean sheet here to protect your wheels face.
Step 2: (Note: You’ll get a more accurate measurement if the level sits on the lip, not the tires sidewall)
Measure the height (width) of your wheel from the floor (face/outer lip) to the top (inner lip.) An easy way to do this is to rest a level at the top then measuring to the lowest point as shown in the picture.
Take down this #, label it as “A”
Step 3:
Measure the distance from the hub to the same point on the level. Jot this # down as “B”
Step 4:
Using the formula Offset=B-(A/2), we can now determine the offset.
In the photo samples:
A = 295
B = 186
Offset = 185-(295/2)
Offset = 37.5mm
*Numbers are rounded off, the sample is not meant to be an accurate #, but to demonstrate how to perform the measurement.
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