offset and j size

[cra1gy1989]

Hi all,
I am selling a set of wheels and I've been asked what is the offset and j size? I understand offset, but where does it say this on the wheel? Or do I have to measure myself? And I don't really understand 'j size' any help would be much appreciated!
Cheers

[Marf]

It'll be stamped on the rear of the wheel somewhere, usually with ET in front of it. Could be on a label too.

J refers to width. 8J is 8" wide, 9J for 9" wide. No idea why J is used.



These are 6.5" wide with an offset of 37

[anonymous-user]

Look for a stamp on the wheel that may say ET something.

The J number is the width of the rim, measured in inches between the flanges.

EDIT: Marf beat me to it.

[cra1gy1989]

Brilliant, thanks a lot guys!

[xRIEx]

Marf said:

No idea why J is used.

http://www.carbibles.com/tyre_bible_pg4.html said:

The "J" symbolises the shape of the tyre bead profile.

[cra1gy1989]

I just checked the wheels

They say :- 17x7.5jj 38

So the 7.5 is the j and the 38 is the offset?
Cheers

[cra1gy1989]

Brilliant, thanks a lot guys!

[Captain Muppet]

cra1gy1989 said:

I just checked the wheels

They say :- 17x7.5jj 38

So the 7.5 is the j and the 38 is the offset?
Cheers

No, 7.5 is the width. The j (or in this case jj) bit isn't anything to do with the width it's just one of several tyre bead profiles that no one cares about.

Please lets not start calling wheel width "j" - there is too much stuff on the internet that's wrong already.

[Dr Mike Oxgreen]

Breadvan72 said:

the width of the rim, measured in inches between the flanges.

[anonymous-user]

You took your time!