I am going to replace my chain. I am also going to replace my biggest chainring with a bashguard. In terms of length, should I just measure my new chain ( in terms of number of links - I know that it needs replacing based upon >1/8 etc ) relative to the old one? The old chain shifts o.k. now but could stand some improvments ( and I got XMas $ ) but I only use 2 chainrings ( b/c the big one is bent hence my decision to go bashguard ) and with it shifting okay should I take the chance and cut the new chain way down? Any advice would be much appreciated.