Chains ???
 

have here stock chain on mine Trek 4300 would it be big diff if i put another one on it ,better one??

thxalot

wtf

zomg

i wouldn't change your chain until it is necessary. there is not going to be any performance gain that you would notice.

more or less, a chain is a chain. when you do get a new one, i would get the kind that has a quick link that allows you to remove the chain with no tools

That's why I bought a new chain to replace the Shimano HG73 that came on my Pirahna. I didn't like the whole pin deal so I got a SRAM PC991 instead.

Replacing a chain for the sake of upgrading is a waste of time and money. If you keep riding you'll need one soon enough as they wear quickly. You should change your chain more often to keep from wearing out your cassette (which is more expensive). I chain my chain 3 times for every one change of my cassette.

Your LBS has a chain wear measuring tool. It's cheap and I recommend getting one. I think they are about $15.00. I check my chain wear often and as soon as it gets close, I get a new chain.

There is no need for a special tool to do that. A simple ruler will do the trick, every other pin should be 1 inch apart. Here is a link to better describe the chain measuring process.
http://sheldonbrown.com/chains.html