Depends on how worn they are, check the old chain for stretch by measuring pin to pin with a tape measure. A new chain will line up at 12"bikerboyj17 said:So I broke my chain in a race yesterday but managed to use the powerlink to finish the race. Now my chain is a little short since I had to take out a couple links when fixing it yesterday.
If I buy a new chain should I also replace the cassette and chainrings? I already have some new chainrings sitting around.
-12 1/16" just replace chain
-12 1/8" probably need to replace cassette
-12 1/4" replace chainrings too