Why should you change your bike chain regularly?
A bike chain is a wear part. Due to constant stress, it stretches over time – even if it still looks good on the outside. This so-called “chain stretch” causes the cassette and chainrings to wear out faster.
The consequences of a worn chain:
👉 Therefore: Better to change it early than having to replace expensive components later.
When should you change your bike chain?
As a rule of thumb:
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Road bike / E-bike / Trekking bike: every 2,000 – 4,000 km
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Mountain bike (off-road): often after just 1,500 – 3,000 km
However, the most reliable method is to measure it with a chain wear gauge.
What do you need for a chain change?
Before you start, you should have the right tools ready:
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New bike chain (matching the gears, e.g., 9-, 10-, 11- or 12-speed)
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Chain tool or chain breaker
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Optional: Master link pliers
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Gloves (recommended)
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Rag and chain oil
Differences between 5-, 6-, 7-, 8- and 9-speed chains
Depending on the shifting system, the bike chain primarily differs in its width and compatibility. While 5-, 6- and 7-speed chains are relatively wide (approx. 7.8 mm), chains become narrower as the number of gears increases, as the sprockets on the cassette move closer together. 8-speed chains are usually around 7.1 mm, 9-speed chains are even narrower (approx. 6.6 mm).
Important: The chain must always exactly match the number of gears, as a chain that is too wide will not fit cleanly between the sprockets, and a chain that is too narrow can lead to play, poor shifting performance, and increased wear. In addition, the systems sometimes differ in their connection options – older 5- to 7-speed chains are often riveted, while master links are common for 8- and 9-speed chains. If you are unsure, you should refer to the existing chain or cassette to make the right choice.
Even with MYVELO e-bikes and bicycles, the chain can be easily changed yourself with a little manual skill. Depending on the model, different shifting systems are used, which must be taken into account when choosing the right chain: The MYVELO e-folding bikes are equipped with a Shimano 7-speed gear system and accordingly require a classic 7-speed chain.
Step-by-step guide: Changing a bike chain
1. Preparation
First, shift to the smallest sprocket at the rear and the smallest chainring at the front. This puts the chain under as little tension as possible and makes it easier to remove.
2. Opening the old chain
There are two options:
👉 Tip: The first time, it's worth retrofitting a master link – it makes future changes much easier.
3. Removing the chain
Now you can simply remove the old chain from the drivetrain.
It's advisable to carefully note the path through the derailleur and front derailleur – or take a photo.
4. Adjusting the new chain to the correct length
The new chain is usually too long and needs to be shortened.
Here's how:
👉 Alternatively: Lay the chain over the largest chainring and largest sprocket (without the derailleur) and then add +2 links.
5. Threading the new chain
Now guide the new chain through:
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Derailleur
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Cassette
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Chainrings
Important: The chain must run correctly through the pulley wheels of the derailleur.
6. Closing the chain
Depending on the system, there are two variants:
7. Checking the function
Finally, you should:
8. Lubricating the chain
While a new chain is often lightly oiled, fresh lubrication is still recommended:
Common mistakes when changing a chain
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❌ Incorrect chain length
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❌ Chain incorrectly routed through the derailleur
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❌ Incorrect chain for the gearing
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❌ No re-oiling after the change
Conclusion: Chain change saves money and ensures riding fun
Changing your bike chain is quick with a little practice and saves money in the long run. Regular checks and timely replacement protect the entire gearing system and ensure a continuously smooth riding experience.
👉 Especially for frequent riders and e-bike users, it's worthwhile to master this simple maintenance task yourself.
