BikeParts guides
Ride more. Guess less.
Practical guides to fitting, sizing and looking after your bike, from the team who check and pack your parts.
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Guide of the week
Read the full guide
When to replace your chain
Check it in ten seconds and save yourself a cassette.
1Shift onto the big chainring
2Drop the wear checker into the chain
3If it sits fully in, it’s time
0.5%Still not sure?
Ask the workshop
Send us your bike and the part you need. Our team will tell you exactly what fits.






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