I think they are basically training. I have two pairs left. I bought the first one in Miami in '95; every guy there was wearing these (RD Aviator) 76mm wheels so I didn't resist
Now I use Rollerblade XTV with 82 and 76mm wheels (rockering issues

) for slalom and I like them
Sorry if I am a little off topic... it was just a break, now back to the challenge