14 X 5.5J Rims - What does the J represent?

[DRSMPS]

Hi!
I want to order new rims on line. My manual states that I am supposed to run ST205 75 R 14 LR C tires on 14 X 5.5 J rims. I understand all the coding, but don't know what the "J" represents. I just want to make sure I'm ordering the proper rims and not neglecting something important.

Thanks for any help you can provide.

[coolbreeze01]

J.......Size of the rim flange.