If you are planning on going on a multi-day ride or just riding a long distance in a day, you should have something for first aid, just in case. Unfortunately, almost everyone who cycles frequently will go down at least once in their life. This kit can be really small and compact and can include bandages, some gauze, and a small bottle of a disinfectant.
2) On my second day, the pannier bag fell off and got lost after I stopped for lunch, which required locking up the bike somewhere, so I took the bag into restaurant and re-attached it using the two velcro straps on the rear rack. I've used many panniers before, thought I did it correctly. But apparently I did not. So I paid $55 (cost) to replace everything in bag and bag. In hindsight, I wished I'd put a bungee around bag straps to really secure it to bike. PROBABLY MY FAULT.
Where to begin?! Long story made somewhat short. I bookmarked this place because I saw their dog Kaya and was sold. Lol. But they had 5 stars too so that helped. Amazing people. Very down-to-earth. Took the bikes down the path to Discovery Park. If you're in-shape and do mild cardio, then it should be an ok ride. I don't do cardio and I found myself trying to sell my soul like 15 times just to get to the top of some hills. Lol. Made it to the Ballard locks and actually got to see a boat pass through! This is the off-season so not much boat traffic. Steve, an engineer we met there, said peak time will start in May. Ate lunch at Ann's in Ballard. Delish shrimp sate! I busted my tire in a pothole and had to make a trip to REI. Which wasn't awful because we wanted to go there anyway. The city was tough to ride in at 5:00pm and we rode the sidewalk most of the way back due to the congestion. Some pedestrians are obvious to you and I almost ran over a few people.. By choice. Lol. Made it back right before they closed at 6:00pm. Easy peasy! Notes: Take some water. Take some pictures. The ride is beautiful so don't rush through. Get there before noon to give yourself some time to cruise.
Modern bottom brackets use a sealed bearing type construction that keeps water and debris locked out, so they seldom go wrong. Maintenance is impossible so they need replacing when they do wear out. Older style cup bottom brackets need to be re-greased every now and again, and occasionally will need to have their bearings replaced. There are a lot more teeth on the chainring cogs than those on the rear cassette, so need changing less regularly. Cranks usually a solid one piece construction so there is not much to go wrong.