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RPM (revolution per minute) is the unit used to measure the rotation of the crank shaft per minute.
Step 1: Remove the tire and old tube: Pry under the bead of the tire with one of the tire levers and hook it to a spoke. Move over about 4 to 6 in. and insert the other tire lever. Pry it down and then slide it along the rim to release the tire.
Step 2: Install the new tube: Press the tire back over the rim, being careful not to pinch the tube. If it’s too tight to push the last section by hand, use the tire levers to pry the tire onto the rim.
You can think of gears as the same thing as speeds – a bike with 18 gears is an 18-speed bike. Bikes generally have 1, 3, 18, 21, 24, or 27 speeds. (10- and 15-speeds are obsolete and you don’t see them on new bikes any more.)
Lower numbers are the low gears, and higher numbers are the high gears.
Derailleur gears are a variable-ratio transmission system commonly used on bicycles, consisting of a chain, multiple sprockets of different sizes, and a mechanism to move the chain from one sprocket to another.
Always think about wearing multiple layers, so you can fine-tune your clothing microclimate. If you step out of the door in low temperatures on a wet and windy day, you’ll be tempted to put on your thickest, warmest kit – but if the weather improves, you’ll be boiling.
So if you set off instead with a baselayer, a short-sleeved jersey as a mid-layer plus arm-warmers, gloves, and a skullcap under your helmet, with a waterproof jacket or gilet packed into your jersey pocket, you can easily shed or add layers as needed.
Every bike needs a little tender loving care to ensure you get a smooth ride. Follow these steps to ensure your bike runs smoothly every time. Keep it clean. Keep your tires inflated properly. Check your brake pads. Silence squeaky brakes. Tighten saggy brakes. Get professional service at The Bike Shop. Lubrication, lubrication, lubrication! Check if your wheel is “true.” Get your saddle perfect!
On a regular basis, look at the entire chain by standing to the side of your bike and lifting the rear wheel off the ground. Use your free hand to slowly rotate the closest pedal, inspecting individual chain links for dirt buildup, rust and/or tight links (links that do not bend easily as they pass through the rear derailleur). Also check for adequate lubrication by listening for squeaks while riding. If you find any of these condition, your chain needs at least a spot-cleaning.
Using the gauge on your pump, pump the tubes to your optimal pressure. Check the sidewall of your tire: it should list the pounds-per-square-inch (psi) range that your tire can safely handle. Then use your upper body to pump!
STAY INFORMED ABOUT THE LAWS
It is important to stay informed about laws that involve cyclists. It may just save you getting a ticket for breaking one of them.