First, I researched. I looked at Amazon’s top-rated products and their user reviews. Then I consulted Bicycling magazine, Gear Junkie, Bike Radar, Outside, and the occasional bit by Lennard Zinn via Velonews. I also found some worthwhile discussions at Bike Forums. Then I spoke with four experts, Ramona Marks, Scott Karoly, Cari Z, and Alison Tetrick, riders from all across the spectrum, who tour, repair, and race.
In addition to the Rema patches, put a new tire tube in your kit. The best method for dealing with a flat roadside is to swap out the tube and save the task of patching for later. If you’re not sure what size your tires are, it’s printed on the sidewall of the tire. This inner-tube buying guide has some photos of where to look. What brand is almost irrelevant as many tubes get manufactured in the same place, so whatever your local shop has behind the counter for under $10 will work fine. The only reason to spend more would be to save weight.
The Bicycle Repair Shop does rentals by the hour or by the day. They have reasonable rates. They have solid, lightweight hybrid bikes so you can tackle train tracks and brick streets and hills. They also have road bikes for the more experienced. You can reserve online in advance. You get a helmet and a lock with your rental. The staff in the shop are friendly and will suggest routes and point out hills if you're new to the area. And believe me these hills are no joke!
On a very sunny Saturday I had a rear spoke break - you can imagine that no shop was willing to promise a quick repair! I was so fortunate to find this shop and will come back - Andy not only told me to come down and he'd get it fixed, he had his assistant work with another couple while he measured, cut to the right size, installed and trued the wheel while I waited! It was awesome, and the whole place had a great feel and good people. Best of all he charged a very fair $20 for all that work - I would have paid a premium for the quick service! After experiencing lots of attitude at other shops and poor service, this was a real find. I hope you will check them out, they have a great selection of bikes and accessories too! Good people and good craftsmanship should be rewarded.
Maintenance is the best prevention. “Prevention is the best medicine, and if you’re taking care of your equipment it’s super key. Bikes don’t just fail. If they’re in really good working condition and you clean them at night, and you’re religious about it, bikes are kind of like cars — they’ll start talking to you if something is getting worn or getting creaky or needs to be replaced.”
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.