kawasaki rims

[RED IS 91]

I got these from a guy at the warehouse . He was going to throw them out .They look like new.
The numbers on the rim are
RK EXCEL J16XMT3.00 DOT JAPAN 1101-05
I also got the back rim .
Anyone know anything about these ???
http://i141.photobucket.com/albums/r73/bogeyman700/rims003.jpg
http://i141.photobucket.com/albums/r73/bogeyman700/rims001.jpg

[doucy2]

unique?
what kinda bolt are they?

[RED IS 91]

BOLTS?????????

motorcycle rims !