What does 7J Mean ?

[jon.od]

I understand offset, pcd, Rolling Radius, but the 7J bit of the 17x7J wheel equation stilll troubles me.

I assume the 7 is seven inches wide but was does the J do for you ? Had a quick look on the net but havent managed to come up with any real solutions !

[smartboost]

7J x 17H2

What does the J and H2 mean?

According to Bridgestone UK's technical department, the J refers to the flange profile and H2 means that the rim features a double hump.

For more information, go to www.chris-longhurst.com/carbibles and select "The Wheel and Tyre Bible". [:I]