hmm, i guess i could squeeze everything i carry into pockets and saddle bags, and strap things to my frame.
but i regularly ride different bikes: rigid singlespeed/hardtail/bouncy Xc bike/downhill bike with a granny gear.
and i wash my clothes.
having all my stuff in a bag means all i have to do i pick up my bag, and i’m ready to go.
i don’t want to spend time moving my pump/saddlebag from one bike to another.
i don’t want to spend time emptying pockets after a ride, and then reloading pockets before a ride.
putting everything in 1 bag is a much better idea.
but in case you’re still curious what i put in my backpack:
water
pump
2 tubes
tyre levers
puncture repair kit
inhaler
multi tool
shoe laces
leccy tape.
quick links
mech hangers
snack
cash
and often:
house keys
car keys
phone
extra layer
buff