Anything less than 20mi I dont need anything on the bike except my cell phone in case of a flat. The 20mi course is for my innermost racing desires and is my personal time trial. Other than that I'm carry everything for a flat, a mini-pump and water bottle on the frame. It's far too easy to get carried away with stuff you think you'll need and seemingly never do.....until you get a flat or need a snack or run low on water 30mi from the nearest nowhere.