Hoping to spend more time riding my Legnano Gran Premio, I decided to do some upgrades, swapping the Stronglight cottered crank for a 49d. Since doing so, my chain is too loose...


When cutting chain, the chain is threaded through the derailleurs, set to big ring and big cog, then I cut the chain as short as possible. This has always worked well, however...

The Gran Sport on the bike does not take up enough chain slack. The derailleur is rated for 14-26 teeth and I am with-in that range. So, any special tips I should be aware of to get the chain to remain properly tensioned?