Originally Posted by
FBinNY
every bike has it's own unique tool needs, though there are a number of common elements. Though I've never been a fan of tool kits per se, except maybe socket sets, the differing needs of my various bikes clinches my decision to forgo kits. On my good road bike all I carry is a combination 5/6mm hex key, tire levers, spare tube and a pump. One of my other bikes has no hex keys, so I need to a wrench for axle nuts.
These are just examples, but I hope you see the point. Decide what emergency repairs you want to be prepared for, and carry on each bike, it's specific tool requirements. BTW- I ride fairly far form home, so each bike has $50 emergency cash hidden on it.
I agree wholeheartedly with this about figuring out exactly what you need and carrying exactly that. I might suggest a refinement based on your "family" situation. In my family, every tube and every tool for everyone's bike rides together in a "family" tool kit. No need for everyone to carry their own, especially when stuff is duplicated.
Also, if you are worried about saddles being stolen, give a thought to any attached tool bag also being stolen.