The thumb test is the fine art of pressing on the tube with your thumb to see if it’s inflated. During testing, I took a pressure reading out of curiosity, and to the touch, road tires feel fully inflated around 30 psi. How pathetically sad—30 psi!—when you’re probably trying to reach at least 60 psi on a mountain bike, 70 or more on a hybrid, and it only goes up from there.
We offer a convenient Mobile Bike Shop experience at your home or office. We believe that bicycles can help change the world. Whether you are a road warrior, a commuter, an elite triathlete, a daredevil mountain biker, or enjoy your leisurely weekend rides on your e-bike, our goal is to offer a convenient premium service that gives you more time to do what you love…RIDE!
Change and a $20 bill:   In case your cell phone’s battery dies, it’s nice to still be able to use a payphone if you need to.   Also, the $20 is a great thing to have in case you lose your wallet or have some other mishap.   I’d rather be able to sit in a coffee shop or fast food restaurant when it starts raining while I’m waiting for my friend or cab ride, and a hot cup of tea or coffee or the beverage of your choice and a snack makes it all the more pleasant.  Just try to remember, this is for emergencies, and if you use it, replace it ASAP!

I bought this book to supplement "Anybody's Bike Book" because I always like to get a second opinion. This book uses photos extensively rather than drawings as in the other book. They are well composed and quite helpful providing additional detailed information in a clear, conciseful manner. Information is provided in heirarchy format and geared from initial purchase to daily maintenance of my two wheeled friend. Good book!
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.
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