An Allen key, also known as a hexagon wrench or hex key, is a tool used to tighten or loosen screws or bolts with a hexagonal recess (hexagon socket). These special screw heads require a correspondingly shaped wrench to operate...

A puller is a tool specifically designed for disassembling bicycle parts. It is used to remove parts such as cranks, chainrings, headset caps and hubs from bicycles. Different types of pullers for bicycles There are different types of pullers designed...

A brake disc straightening tool (also brake disc straightener or disc brake straightening tool ) is a special bicycle tool used to realign slightly warped brake discs (disc brakes). A brake disc straightening tool is a handheld metal tool specifically...

A truing stand in the context of bicycles is a special device or fixture used by bicycle mechanics to ensure that the wheels of a bicycle are correctly centered. Truing bicycle wheels is important to ensure that they rotate smoothly,...

What is a chain riveter? A chain tool is an indispensable tool for every bike lover and mechanic. This compact but powerful instrument allows you to shorten or repair the bike chain by inserting or removing the bolts of the...

A chain whip is a specialized bicycle tool used to remove or secure cassettes (cogs) on the rear wheel. It's essential when removing a cassette—for example, to clean it, replace it, or service the rear wheel. Structure of a chain...

On a bicycle, clamping areas are those zones where components are fixed and clamped by screw connections. These areas are particularly important for safety, as forces are transmitted here and incorrect tightening can lead to material damage or component failure....

A crank puller is a special tool needed to remove the crank arms of a bicycle or e-bike from the bottom bracket axle . Because the crank arms are pressed tightly onto the axle, they usually cannot be removed without...

A crimping tool is a hand tool that permanently joins two metal parts together through plastic deformation—without screws, soldering, or gluing. The term "crimping" describes precisely this process: The tool squeezes a metal element (the crimp sleeve) around a cable or wire in such a way that a positive-locking, tensile-resistant connection is created.

An open-end wrench is a handy tool used in many mechanical applications, including bicycle maintenance. It is a manual wrench that has a jaw opening at both ends of the handle. This allows the user to grip a bolt or...

What is a pedal wrench? A pedal wrench is a tool specifically designed for assembling and disassembling bicycle pedals. Bicycle pedals are usually attached to the crank arms with threads, and the pedal wrench is used to loosen or tighten...

A reversing ratchet (also called a freewheel ratchet or part of the freewheel mechanism ) is a central component in the rear wheel hub of bicycles. It allows the rear wheel to rotate freely without the pedals turning, while simultaneously...

What is a sprocket puller? A sprocket puller is a tool used to remove sprockets from bicycle hubs. The sprocket is the gear on the rear hub that engages the bicycle's chain and allows power to be transferred from the...

Ein Ventilkernentferner ist ein kleines Werkzeug, mit dem sich der Ventilkern – also der innere Verschlussmechanismus eines Fahrradventils – herausschrauben lässt. Er ist vor allem bei Tubeless-Systemen unverzichtbar, weil dort Dichtmilch durch das offene Ventil eingefüllt wird, ohne den Reifen zu demontieren.

A bicycle air pump is a tool used to increase the air pressure in a bicycle's tires to the recommended level. It is used to pump air into the tires so that the bicycle can ride safely and efficiently. There...

A chain gauge is a small tool that allows you to easily and reliably measure the wear of a bicycle chain. It's a particularly useful tool for frequent riders or anyone who wants to preserve their bicycle parts for a...

A nipple wrench is a tool that is specifically designed to adjust spoke nipples on bicycles. The spoke nipples sit at the end of the spokes and connect them to the rim. With a nipple wrench you can change the...