Originally Posted by
noimagination
(Oops, forgot the most important: money and/or credit card - though many youngsters keep their payment method on their phones nowadays, or so I've heard.)
I'd be curious how well the phone-only method works these days, in convenience stores in particular. Out of habit I just hand the card when I am normally in one so don't really notice if they upgraded yet or not. I have not needed any replenishment on bike rides in a long time and I don't carry cash or cards any more.
Oh, in my bag I have a multi-tool with chain breaker, Stan's Darts, a Park TB-2 tire patch, and tire levers. I have a small pump on my frame. On trips further afield I include a tube as backup.
Hey if you are running aero rims tubeless, make sure your backup tube has a long enough stem. I did a couple rides with a likely-useless backup tube.