I also carry a multi-tool (that takes care of the basic needs I would have) and a mini pump and tire levers…..I also carry two co2 cartridges (my lbs recycles them) a co2 inflator, patches, ID, cell phone and money, all of it in my seat bag. I have handlebar bags for all my bikes that usually holds a camera, tube and nutrition. I’ll also easily 2nd the need for the visibility of a blinky on road rides!!!!

I’ll take a couple more tubes on long more isolated rides along with a spare brake and derailleur cable, replacement chain links, some spare spokes and maybe a spare tire depending on the route.