A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
Mountain bike (MTB) can mean almost any kind of off-road bicycle. Wide knobby tires, flat handlebars, maybe shocks, probably a sturdy frame...
Bikes designed for road use only. Could be any road-only bike, but typically means bikes optimized for speed / racing / club rides with drop handlebars, narrow tires and a crouched-forward rider posit…
Shimano brand bicycle components. (No need to use if Shimano is an incidental part of the question.)
The rubber attached to the rim of your wheel. Flats, changing tires, selecting tires, etc.
Disc/rim/drum/coaster brakes; braking technique, maintaining brakes, anything else about stopping a bike.
The big round things your bike rolls on. Rims, spokes, hubs, etc. If it's all about the rubber part, "tire" tag is better.
Tools, parts, techniques, and procedures to keep your bike in working order. MAINTENANCE is not the same as REPAIR, a separate tag. Maintenance is what one does on a regular basis. Repair is what one …
Repairing, maintaining, or replacing the chain on your bike that connects the front of the drivetrain (cranks, chainrings) to the back (cogs, cassette).
Bicycle frame construction, selection, maintenance, and repair.
The crankset is the combination of components that convert motion from the rider's leg movements into rotational motion to drive the chain and propel the bike. The crankset includes one or more chainr…
Gears in the drivetrain of a bike.
Repairing your bike when something is broken. REPAIR is not the same as MAINTENANCE, a separate tag. Repair is what one does only when something is broken. Maintenance is what one does on a regular ba…
Mechanism to move the chain from one sprocket to another.
The part of your bike that contains the axis the cranks arms spin 'round. (The crank arms are where the pedals attach.)
A cluster of sprockets, commonly 5 to 11 of them, attached to a freehub on the rear wheel.
Brakes with a disc near the hub and calipers that grip that disc.
Questions looking for help with brand or model identification of a cycle. You MUST include a photograph of the complete bike. The serial number on its own is not enough to identify a bike.
Questions about shifting between gears or the shifters themselves.
Questions referring to the derailluer responsible for moving the chain along the cassette
Riding safely, safety equipment, and safe places to ride.
Usually means the front fork, where the front wheel sits. Can also mean the rear fork, a part of the frame.
The cogs (gears) at the front of your drive chain, connected to the cranks.
Riding to and from work. Other cycling primarily for transportation. Carrying stuff. Picking a bike. Related issues.
Concerning the parts and mechanism of bike gearing, both internal and external. Multi-speed, single-speed, fixed and freewheel.
Bicycle components without which it's not a working bike: wheels, brakes, saddle/seat, bottom bracket, derailleur, stem, handlebars, bolts, etc. Also tag with specific part.
What components are compatible with what other components
The things you push your feet against to make the bike go. Pedaling technique, and other stuff related to pedals. Clips and clipless pedals.
Hydraulic disc brakes use fluid (either mineral oil or automotive brake fluid) to transmit brake pressure from the handlebar levers to the disc brakes on the wheel.
The outer edge of a wheel, holding the tire.
A rubber torus shaped balloon which is inflated via a valve inside a tyre to keep it rigid.
How to get the right sized bicycle for you or adjust your bicycle to fit you better.
Questions about a bicycle's drivetrain system, including the chain, gears, chainring, derailers, etcetera.
Handlebars are the part of the bike where the rider holds onto for grip and steering of the bike.
The specialized system(s) of a bicycle that insulate a rider from rough terrain.
Touring usually means very long multi-day (or multi-week) rides carrying a lot of gear (camping, cooking, clothes, etc) on the bike. Can also apply to unloaded/creditcard touring involving using hotel…
Vintage is generally considered more than 50 years old, but in the bicycling world anything more than 20 years old is usually considered vintage as well.