Originally Posted by
KidTruth
Bring: 2 tubes for long rides, 1 tube for short rides. 2 CO2 cartridges for long, 1 for short. One multi-tool. One set of patches (these are pretty much useless but so light that you might as well. I prefer to just change the tube if I get a flat, so unless you get more than you planned for...)
I'd also throw in some levers or a tire-stick - unless you know that your tires are easy on/off with just your hands. I pretty much leave what you had recommended for long rides in my bag at all times and I carry 3 CO2s just in case of a mis-thread and you blow a cartridge.