I have two bicycles I use to commute: a 1993 Cannondale H400 and a 2014 Fuji Absolute 3.0 LE. The Fuji has a gear set of 48/38/28. The Cannondale has 50/40/30. I am not yet able to take full advantage of the top end of either but was just wondering if I could change my Fuji to have a 50 tooth gear to match the Cannondale. The Cannondale has a Shimano Altus A10 Derailleur. They are cheap. I understand there is a Shimano R453 that I might be able to use also. If it involves anything more, I would not consider it. Could anyone give an opinion?