Joined: Oct 2011
Posts: 10,036
Likes: 2,495
From: Fairplay Co
Bikes: Current 79 Nishiki Custum Sport, Jeunet 620, notable previous bikes P.K. Ripper loop tail, Kawahara Laser Lite, Paramount Track full chrome, Raliegh Internatioanl, Motobecan Super Mirage. 59 Crown royak 3 speed
I'm pretty sure those chainrings aren't rivoted just capped with hard pastic caps on the outside. You should be able to get the caps off with a knife or screwdriver and a little effort revealing the bolts.