I have about a 10 year old Fuji road bike. The bike is in great condition, very light, looks like new and only gently used. My question is, as I am about to start putting in a great deal more mileage, should I look at upgrading my bike (new gears, other componenets, etc. to go from a 16 to 24 gears, if this can even be done) or look at buying new?

TJMAX