I tried on a pair once. They have rolling metal bars in place of grind plates for "faster, better grinds" and "a cooler noise while grinding." Yeah, well, they're UGLY :P

Dont get all technical on us, lol. They are sposed to be amazing to grind on (better than plates ) I think they look sweeeet !

Hey, Check it out, i found some pix of these things....i dunno if they're these cause these are TGS....the ones im showing u were on ebay....anwyayz, u be the judge:

The RB shoes were junk. The metal rollers either rusted or bent in rendering them useless. That and it was near impossible to form a groove in the damn plates.

uhhhh.....stupid question....what were the rollers for?

hmm....i thought the idea here was that all u needed was the plate....i thought that was the idea there.....and if they're gonna bend like Dario said, they must be a useless annoyance.....rollers...hehe

Rollers are for grandma's hair. Not for grind shoes.

http://cgi.ebay.com/RollerBlade-Grind-shoes-Mens-sz-6-US-NEW-IN-BOX_W0QQitemZ270069107004QQihZ017QQcategoryZ137011QQssPageNameZWDVWQQrdZ1QQcmdZViewItem?hash=item270069107004

different colours of them here

i jus got a pair of these today, really comfortable and grinds really smoothe but there is no lock on what so ever...over all they are good, especially just to play around with

How are they replaceable? From every picture I have seen, they appear fixed, with no way of removing them.

ehh, those shoes are whacko, ugly, and they suck

those are awesome
cant find any on ebay though
what do you search?

I sure they would be good to "try" new but from what the comments are i don't think you'd want to own these for your grinding.
I think the rollers are there for when its a rough surface that would destroy plates. But if the rollers have a problem it would mess up regular grinds I'd think.