Dual Fixed Cog 18/16
CNC machined 1-piece dual rear cog (18T and 16T) allows a gearing choice without removing the rear wheel. Just loosen the axle nuts, slide the wheel, move the chain to the other cog, set the chain tension, and re-tighten the rear axle nuts.
It's lighter than 2 separate cogs, and don't worry about alignment. It can only be used with a 3/32" chain, which has plenty of flexibility to handle a few mm of lateral positioning.
Another nice feature is that it allows yet another option for the other side of the hub, assuming it's a flip-flop hub.
Supplied with its own lock ring.
I like the dual sprocket a lot. I ride in the 16 cog most of the time, but I have the 18 as an insurance policy of I get tired or come up against a big set of hills. The fit in finish on this cog is fantastic. Very well made.
This cog works great for
"This cog works great for me. It's gives an extra option, which helps in hilly east TN. were I live. It's well made and will last the life of the bike from what I can tell"