Chain or belt?

More about chain and belt drives

For whom is a belt drive ideal? Is the chain or the belt better? What are the advantages and disadvantages of a belt drive and a chain drive?

How does the belt drive work?

Instead of a conventional bicycle chain, a belt-driven bicycle uses a carbon belt with nylon teeth on the inside. There is a larger pulley on the crank, while the second pulley is slightly smaller and attached to the rear wheel hub. The toothed belt is tensioned between these two pulleys so that the teeth of the belt and the pulleys mesh. Correct tension prevents the belt from slipping.

Who is a belt drive ideal for?

There are many reasons why a belt drive can make sense for many people. In particular, the low wear and associated longer service life of the drive is an important factor. This can be of particular interest to frequent riders, as regular replacement of the chain and sprocket is no longer necessary.

In addition to the advantages already mentioned, the belt drive also offers noiseless movement and less friction. In contrast to the use of chain oil or grease, the belt drive is completely clean and can be ridden with suit trousers, for example, without any problems.

Belt drive advantages and disadvantages at a glance

Advantages

• Easy to clean

• Long shelf life if handled correctly

• No disturbing noises if the belt is guided correctly

• Belt is significantly lighter than a chain

Disadvantages

• No repair of the belt possible

• Procuring spare parts is becoming more difficult

• Not easy to transport, as there is a risk of damage in the event of incorrect compression such as buckling

• Cracks and other defects are difficult to see

• The drive belt must be re-tensioned when removing the rear wheel

At a lower cadence, derailleur gears can be more efficient in technical measurements, but in practice cyclists usually do not feel any difference in friction. However, the belt drive can be severely affected by slush and dirt, which should be taken into account when riding in winter.

In terms of safety, the belt drive may be more dangerous due to the difficulty of detecting cracks, as a broken belt poses a higher risk of accidents. For cyclists who often dismantle their bike to transport it in the car, a chain drive may be the better choice, as the belt tension has to be readjusted after removing the rear wheel, which takes time and effort.

Chain drive advantages and disadvantages

Advantages:

• No adjustments required after removing the rear wheel

• Less sensitive to external influences

• Replacement chain easier and cheaper to procure

Disadvantages:

• Maintenance is more complex without a chain case

• Lower durability

• Heavier compared to the plastic belt

• Cracking or rattling with a poorly maintained chain

• Soiled trouser legs without chain guard