How does a Rocket sprocket work?

[JoKeR63]

Something else not obvious is that the peg on the crank arm keeps the chain ring from rotating, but the lock nut should be pretty tight on the chain ring, anyway. So this has to be put in loose or something so it can switch, which is liable to introduce some funky rattles and odd feelings as you ride.

One of those washers in the second pic is a bushing that goes thru the sprocket to let it float.

"See? It does exactly what was made to do.... expand the seller's wallet!" Right On!

 

[bikeriderx]

Neat bit of bike memorabilia...But $150... :roll: