I'm looking to replace my cassette, but I'm struggling to know which on to get for my bike. I have a Sram PG 850 8 speed cassette, but I now see there are a choice of five of these cassettes on amazon and they all look the same apart from a number. These are the numbers 11-28t, 11-30t, 11-32t, 12-23t, 12-26t. Does anyone know what do these numbers mean and will make a difference which one I get? The Bike I have is a Giant Defy 4, if that helps to narrow it down to which one I need. Cheers!
Looking to replace cassette, but I'm not sure what these number mean?
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vickster
Legendary Member
What year of Giant Defy 4? What does the spec say - you can usually find on bike list.
There's a list here https://www.thebikelist.co.uk/giant/defy-bikes
Do you want to keep the same gears? eg 2015 model is SRAM PG 850 11-32
Usually sensible to change the chain at the same time
There's a list here https://www.thebikelist.co.uk/giant/defy-bikes
Do you want to keep the same gears? eg 2015 model is SRAM PG 850 11-32
Usually sensible to change the chain at the same time
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Here is the bike I have (link below) and yes I just want to swap it for the same cassette without altering the gearing. I'm replacing the cassette because it worn and yes I have the tools.
I see mine says 11-32, but it doesn't say 11-32t. Does this 11-32 also mean it's a 11-32t?
My bike looks like this one, but I think mines 2015 not 2016. Mines Black and white but the marking and everything is the same.
I also noticed on wiggle it says MTB, which I thought stood for Mountain Bike.
https://www.giant-bicycles.com/gb/defy-4-2016
I see mine says 11-32, but it doesn't say 11-32t. Does this 11-32 also mean it's a 11-32t?
My bike looks like this one, but I think mines 2015 not 2016. Mines Black and white but the marking and everything is the same.
I also noticed on wiggle it says MTB, which I thought stood for Mountain Bike.
https://www.giant-bicycles.com/gb/defy-4-2016
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IanSmithCSE
Guru
- Location
- Worcester, Worcestershire
Oh dear the computer software is is clearly confused. :-)
vickster
Legendary Member
I don't remember starting that thread tbh. I think that could have been when a LBS was trying to pull a fast one and told me I needed a cassette replacement because I was replacing my chain. I always get a second opinion though and another LBS said there was nothing wrong at all with my cassette.
Now I know it's worn
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steveindenmark
Legendary Member
11-32 is the cassette you would find on a road bike. 11-42 is the cassette you would find on a mountainbike or gravel bike.
The more teeth on the cog, the easier it is to pedal. The 42 tooth cog is the big one you see on a mountain bike. You can spin up mountains on it.
The more teeth on the cog, the easier it is to pedal. The 42 tooth cog is the big one you see on a mountain bike. You can spin up mountains on it.
