Originally Posted by
JMT114
I am getting a new wheelset and instead of swapping the casette from my old wheel to my new wheel I am going to buy a new one. If i switch from a 12-26 to a 12- 25 or a 12-27, would i need to change the length of my chain?
You should always replace the chain when replacing the cluster.
See:
http://sheldonbrown.com/chains
It will probably be the same length, if your original chain was correctly sized for your bike.
See:
http://sheldonbrown.com/derailer-adjustment for instructions on chain length.
Sheldon "Match The Wear" Brown