Quick steps for pumping a bike tire with a Presta, Schrader or Dunlop valve, plus how often to check pressure.

Four ways to put air in a bike tire, including how to use a gas station compressor safely, and how to find the right pressure.

How to use every kind of bike pump, from floor and mini pumps to CO2 inflators and electric pumps.

Step-by-step instructions for using a bike floor pump on Presta and Schrader valves, reading the gauge, and fixing common problems.

A simple explanation of how a bike pump works, from the piston and one-way valve to the pump head and pressure gauge.

How to open a Kryptonite U-lock, and Kryptonite’s own fixes for keys that won’t turn, broken keys and lost keys.

Lost the key to your own bike lock? The safe, legal ways to get it off, from replacement keys and code recovery to calling a locksmith.

Three ways to use a bike lock cable, how to pair it with a U-lock, and why a cable should never be your only lock.

How to set up and use a Kryptonite bike lock, from registering your key number to locking up the way Kryptonite recommends.