Stepping in it.......

I cannot tell "what kind", but 13 is the rim/tire size. E and J are related to
.............my guess is................width of rim and maybe bolt pattern.........the relavance may not matter..........if you like the rims, that is what matters.

E and J will probably interchange with other rims marked E and J.

I have 6X14J BMW wheels on my Accord. They are 6" wide, 14" diameter
and I really don't know what the J stands for.-Bob

You might try emailing a wheel manufacturer with your question.
and post up what you find so we can all get smarter