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OKoffroad.com — 4x4 Editorial |
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by David O'Brien
reprinted with permission |
The offset (sometimes called backspacing) is the distance from the inside surface of
the dished center (B) to the inside rim lip (A). When you're ready to buy a new set of wheels,
measure the offset of the wheels that you know work - the ones on the vehicle. |
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reprinted with permission |
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HOW TO MEASURE OFFSET
1. Place the wheel (without tire) on a flat surface like a kitchen table with the valve stem up
toward the ceiling.
2. Put a ruler down through the center hub hole.
3. With the ruler touching the table notice where the bottom side of the center touches the
rule- That's what we call the wheel backspacing or offset.
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1. HUB
2. BRAKE ROTOR
3. BRAKE CALIPER
4. AXLE
5. STUD |
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A. INSIDE RIM LIP
B. DISHED CENTER
C. INSIDE VALLEY EDGE
D. CENTER WELD POINT
E. OUTSIDE VALLEY EDGE
F. OUTSIDE RIM LIP |
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G. INSIDE DIAMETER
H. OUTSIDE DIAMETER
I. CENTER OF AXLE TO OUTSIDE EDGE OF CALIPER
X. BACK BELL DEPTH
Z. FRONT BELL DEPTH
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Fourwheeling for me:
"Twenty-five years ago, it struck me that I'd rather be at 2mph on a rocky
trail, with half a tire hanging over a 2,000 foot drop, than in a sports car
on asphalt, cornering at 80 mph at the edge of tire adhesion."
Jim Allen
Author of "Jeep," "Chevy and GMC Pickup Performance Handbook,"
"Illustrated Jeep Buyers Guide," "Jeep 4x4 Performance Handbook," "Classic
4x4s Buyers Guide," and about a thousand magazine articles on four-wheel
drive topics since 1982.
(Thank you from OKoffroad.com)
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Froading for me:
"A great way to have fun with my family and become a part of the
scenery, not just drive down the hiway looking at it!!!"
Terry Pierce
Okmulgee, OK |
Froading for me:
"A way to think about stuff and have fun at the same time."
Froading for me:
"I fell head-over-heals for off-highway driving the first time I tried it. It wasn't enough to
show everybody pictures of where I'd been---I had to write an entire book about it. Five years
later, I'm working on book number five."
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