One good accessory to have with your bike
is a small saddle bag or the light container to carry a few important bits them being number
one; an extra tube that’s appropriate for the bike you’re riding, pair of tire levers,
a patch kit for the unfortunate of having 2 flats in one ride. One option is a CO2 inflator.
A lot of people like them because they’re so small. 1/16 gram inflator is usually enough
for a road bike tire to be inflated up to a pressure that can get you home. I, myself
prefer frame pumps, but a lot of people don’t want them on their bike. This is a small and
useable substitute for a frame pump. There’s usually some room for keys, a small wallet,
and usually these saddle bags are also equipped to hang a blinking light from.