hey guys........working on replacing old chain and front /rear spockets...hit a snag on rear spocket, cant undo, there seems to be something like moon clips inserted near top of bolt.... anyone know what I am talking about? special tool maybe? thanks for any info...

 

sorry, I was HOT and tired when I sent note... i checked a little more and took some advise.... layed the wheel flat on some cardboard, so not to mess with brake disc, then put when in a corner, got my 19 inch 1/2 in breaker bar... wham bam, ka-zing, all 5 nuts off in less than 5 minutes..geez....... gotta love the breaker bars!!!

 

lol you had to use a breaker bar? that **** was on there hella tight!