I'm not sure what size (thickness) chain those come with but I'm sure a simple google search would answer that. That number would be something like 520, 525 etc. As far as the number of links, that would also depend on the sprockets on the bike- obviously a larger rear sprocket would require more links. If you're asking these questions, then I'm assuming you don't have any chain tools, so I would seriously suggest taking it to a shop or having someone that knows what they're doing help you out.