I understand that this is best left up to a LBS, but I do not like any around my area and do not feel like the LBSs in my area are friendly or fair. Also-- I got this bike with the intention of teaching myself.
Originally Posted by
Al1943
The chain width needs to match the number of cogs (gears) in the back, 9-speed, 10-speed, etc. The chain length needs to be cut to the correct length for your particular frame and drive train. If you have any doubt how to do this you should take the bike to a bike shop and let them sell you the chain and install it properly.