So, I have realized that my recently purchased bike has been regeared, with a 13/51 combo. It seems like this gearing will be perfect for the majority of my offroad riding, but, as the bike is plated, if I want to take a longer dual sport trip, this gearing will be a little low. I am thinking of buying a 15t countershaft sprocket, which will be slightly higher than stock, and should work well on longer trips with the 51t rear. Would swapping the 13t, and 15t sprockets back and forth be an easy matter? It seems like the chain should accomodate either one, just a matter of a slight tension adjustment? Thanks.