Trek7k…I carry a tube, CO2, multi-tool. I am not sure how big your mini-pump is. I would just bring your stuff to where you are going to buy it (unless you are buying on line of course). I will say I was initially concerned that the clip would not hold on the trails but it has not been a problem. I ride a hard tail and with all the bumps it takes I am still confident enough to put in my cell phone in it without fear of it coming off. I know another post said they lost theirs but like anything on a bike…make sure that screw stays tight. Mine has never loosened up at all. This is also water proof and it cleans relativly easier than I expected. I rode the left loop twice and right loop once at Tsali on Sunday and it was covered in mud and did clean up nice.