The list of components that you can track on your bike is pretty extensive, and I find it really useful to track how many miles/months components like brake pads and chain have before replacing them. There's only one common/universal item missing that I can see - bar tape.
Other items that could be added include bottle cages, mudguards, lights etc but these are all "acessories" I guess - bar tape is something that literallly every dropbar bike has - maybe you could call it "bar tape/grips" to cover hybrids and MTBs too.
