Maxxus freewheel to be screwed 18 teeth

18-tooth thread-on freewheel: a key component of your bike transmission

In the world of bike transmissions, every component plays a crucial role in delivering smooth pedaling and overall performance. Among them, the 18-tooth thread-on freewheel stands out for its simplicity, reliability, and compatibility with many city bikes, vintage mountain bikes, and single-speed models. Let’s take a closer look at this often overlooked, yet essential part.

What is an 18-tooth freewheel ?

The freewheel is a mechanism located on the rear wheel of a bicycle, screwed directly onto the hub. It allows the rider to transfer pedaling power to the chain in one direction, while enabling the cranks to rotate freely when coasting. This prevents the pedals and chain from moving when the rider stops pedaling.

The 18-tooth version is especially popular on single-speed transmissions, commonly found on city bikes, delivery bikes, and older mountain bikes. It strikes a balance between speed and pedaling torque, making it ideal for urban rides or flatter terrain.

Key features of an 18-tooth thread-on freewheel

Here are the main characteristics of a standard 18-tooth freewheel:

• Tooth count: 18, offering a moderate gear ratio suitable for versatile use.

• Thread-on mounting: classic design, compatible with most threaded hubs (English BSA or ISO standard).

• Threading: typically 1.37"x24tpi, fitting the majority of rear wheels on single-speed bikes.

• Steel body: built for durability and long-term resistance to chain tension.

• One-way ratchet mechanism: allows free rotation in one direction and locks in the other for direct power transmission.

Why choose an 18-tooth freewheel ?

Choosing an 18-tooth freewheel depends on your riding needs and bike type. It comes with several benefits:

• Easy installation: it screws directly onto the hub without the need for complex tools.

• Low maintenance: its simple design ensures long-lasting performance.

• Wide compatibility: ideal for single-speed setups or custom builds (like converted fixies).

• Versatile: perfect for daily commuting or casual riding.

Freewheel, sprocket, and chain: a transmission trio

Within a bike transmission system, the freewheel works hand in hand with the rear sprocket, chain, and chainring. A worn or dirty freewheel can lead to chain skipping, uneven pedaling, or reduced efficiency. That’s why it's essential to maintain it properly and pair it with a clean, lubricated chain and a well-maintained sprocket.

In summary

The 18-tooth thread-on freewheel is a smart choice for cyclists looking for a simple, sturdy, and efficient component. Whether you're restoring an old bike, riding single-speed, or simplifying your drivetrain, this small mechanical part plays a big role in delivering a smooth and efficient ride.