Just ordered Aventon Pace 500 ebike. Debating between a smaller trunk bag on bike rack to carry tire pump (need recomendation for up to 50psi), which size slime can (tubed 27.5x2.2 tires), what size trunk bag to carry those items plus small lunch, jacket, cell phone, maybe another water bottle? Do some of you have a larger trunk bag to hold your helmet when off the bike?? Thinking of getting a chain type lock. Appreciate your recomendatons!