new cassette- do i need a new chain?

by ladeside09   December 30, 2012  

Hi guys,

I'm changing my cassette on my road bike from 12-25 to 11-28, my bike is new and i've only covered 70 miles so far...according to the tech docs I need an extra couple of links for the chain if changing to the 11-28 cassette

most sites recommend changing the chain when changing the cassette but my q is would I get away with just adding a couple of links to the existing chain since it's pretty much new anyway or would I be best buying a new chain too?

any advice appreciated
cheers