Rim Offset

[Billy Bob]

Ok I plan on ordering some new 10X8 douglas red labels from onlineparts.com and dont know the difference between the 3NX5B and 3BX5N offsets. What does the B and N stand for?

Thanks, BOB

[SWIGIN]

my guess would be that b stands for back space or the inside offset....no idea what n would be.

id call and make sure

[350Xhilaration]

n=nose -- outside of rim where lug nuts go
b=bell -- inside of rim where wheel mounts to hub

In your first example 3Nx5B
The 3 is the offset on the outside (nose) of the rim
The 5 is the offset on the inside (bell) of the rim

On an 8" rim, with no offset it would be 4Nx4B - The weld down the center of the rim is the centerline

http://www.psep.biz/images/atv/tires/carlisle%20wheel.jpg

So the centerline of the rim (where the wheel meets the hub) is dead center down the middle of the rim.

With a 3Nx5B offset, you'll have more rim from the inner lip to the center than from the outer lip to the center.

With a 5Nx3B offset you'll have more rim from the outer lip to the center than from the inner lip to the center.