I've seen questions concerning tube size but I haven't found anything matching what I'm trying to accomplish. I want to buy a few tubes to keep around for trails-side emergencies when mountain biking.
My mountain bike setups (3 of them):
- 27.5, 27mm inner-width rims running up to 2.3" tires.
- 27.5, 30mm inner-width rims running up to 2.5" tires.
- 29er, 25mm inner-width rims running up to 2.35" tires.
So I'm aware that I can use as small as 26" tubes for all of these but how narrow is too narrow? Would 1.1"-1.3" rated tubes suffice? Keep in mind that I run tubeless and I just want to have a tube in my pack that will allow me to get back to my car if I run into more trouble than a tubeless repair kit can handle.