Matching Your Cassette, Chain and Shifter: A Bicycle Speed Compatibility Guide for India
Buying a new cassette? It has to match your shifter and chain. Here is how to check speed compatibility, with parts from ₹1,120.
Bicycle speed compatibility: why cassette, chain and shifter must match
The most common drivetrain mistake is buying a cassette that does not match the rest of the bike. Your bike's "speed" number, such as 8, 9, 10, 11 or 12, describes how many sprockets sit on the rear cassette. The shifter, the chain and the cassette must all be designed for that same number. If one part disagrees, the gears shift badly, skip under load or wear quickly. This guide shows how to check compatibility before you spend money.
The rule: everything shares one speed number
Think of the drivetrain as a team. A 10-speed shifter pulls the derailleur in precise steps sized for 10 sprockets. A 10-speed chain is narrower than a 9-speed chain so it fits between the closer sprockets. If you install an 11-speed cassette on a 10-speed shifter, the steps will not line up. Always match the number across the shifter, derailleur, cassette and chain.
How to find your bike's speed
- Count the sprockets on the rear cassette (the stack of cogs on the rear wheel).
- Check the shifter for a number; many shifters have the speed printed on them.
- Check the chain; manufacturers often print the speed on the outer plate.
- Use your product listing or the spec sheet if you bought the bike new.
Examples by speed in our range
| Speed | Example cassette | Price |
|---|---|---|
| 8-speed | Shimano HG-50 | ₹1,350 |
| 9-speed | Shimano HG-400 | ₹1,870 |
| 10-speed | Shimano Deore CS-M4100 | ₹3,270 |
| 11-speed | Shimano 105 CS-R7000 | ₹4,610 |
| 12-speed | Shimano 105 CS-HG710 (11-36T) | ₹7,050 |
Do not forget the chain
A worn chain wears a new cassette quickly, so replace the chain when you replace the cassette. For 11-speed, the Shimano CN-HG901 11-speed chain is ₹4,530. For 12-speed, the KMC X12 chain is ₹2,845. Read our pre-winter service checklist for when to check chain wear.
Shifters
If you only want fewer gears or a simpler bike, a matching shifter helps. For a 7-speed system, the Shimano SL-M315 7-speed shifter is ₹1,120. Upgrading from 7 or 8 to a higher speed usually involves changing several parts, not just the cassette, and may require a different freehub body or wheel.
Other compatibility checks
- Freehub type: the cassette must fit the freehub body on your rear wheel. Check the product page.
- Largest sprocket: your rear derailleur has a limit. Choose a cassette whose biggest cog is within it.
- Road vs mountain: road and mountain shifters often have different cable pull; see our drivetrain guide.
Not sure? Ask a mechanic
If your bike is old, bring it to a bike shop before ordering. A mechanic can count the speeds, check the freehub and measure chain wear in a few minutes. For gear technique, our gear-use guide may help too.
Shop the gear
- Shimano HG-50 8-Speed Cassette — ₹1,350
- Shimano HG-400 9-Speed Cassette — ₹1,870
- Shimano Deore CS-M4100 10-Speed Cassette — ₹3,270
- Shimano 105 CS-R7000 11-Speed Cassette — ₹4,610
- Shimano 105 CS-HG710 12-Speed Cassette (11-36T) — ₹7,050
- Shimano CN-HG901 11-Speed Chain — ₹4,530
- KMC X12 Chain — ₹2,845
Related reading
- Bicycle Cassettes and Rear Derailleurs Explained: A Drivetrain Guide for India
- Pre-Winter Bicycle Service Checklist for India (2026-27): Chain, Tyres and Brakes
- Bicycle Gears Explained: How to Use Your Gears Properly (India Beginner's Guide)
Frequently asked questions
Can I put a 10-speed cassette on a 9-speed bike?
Not simply. The shifter, derailleur and chain are matched to the speed, so you would need to change those parts too, and the wheel's freehub may also need to suit.
Do I need to change the chain with a new cassette?
It is a good idea. A stretched chain wears a new cassette quickly, so replace both together.
How do I find out my bike's speed?
Count the sprockets on the rear cassette and check the number printed on the shifter or chain.
