planning some cycling trips this year, but first need to do some remedial/planing work. don't want to buy a new bike, so need to modify (temporarily) my existing mountain/trail bike for road use. obvious thing is a change of tires is needed, but my rims are quite wide, so a complete change of wheels maybe? I have hydraulic disc brakes front and rear, so not sure if that makes any difference or not. maybe a slightly comfier saddle? current one is quite thin and hard. fitting rear panniers shouldn't be a problem front suspension might need stiffened, but it's already fairly stiff as it is. one other thing to consider, keeping mobile devices charged. i have a nexus 5 (so no removable battery) and that (along with the other persons iphone 5s) will be the only devices in use (for navigation when required, photos, etc etc). so need a way to keep the charged - any suggestions? (we're talking a couple of days max).