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forum
Mix and match cassettes?
All the Shimano 8 speed cassettes start with 11 tooth which is too high for me.
I'm looking to start with an 8 speed Alivio MTB cassette 11-32 and swap the first two cogs with a 13 and 14 from a 9 speed Sora road cassette. I know the cogs and spacers on 9 speeds are slightly different thickness to 8 speed but I can get round that by using the 8 speed spacers with shims. I might not even need shims since it is just the last two cogs. EG
Alivio CS-HG51-8:
11, 13,15,18,21,24,28,32
Sora CS-HG50-9:
13,14,15...
Is the 13 tooth Sora the same fit as the 11 tooth Alivio?
Could I swap the 14 tooth Sora for the 13 tooth Alivio?
Does an MTB freehub have the same splines as a road freehub?
End result would be 13,14,15,18,21,24,28,32
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.
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3 comments
Thanks guys!
Rod I didn't spot that cassette - it's better gearing for me but it is a bit far down the quality heirarchy. I was looking at Alivio.
Thanks for that link and info Woldsman. I need to find the corresponding MTB cassette doc.
After I posted I discovered that the width of an 8speed sprocket plus spacer is the same as the width of a 9speed sprocket plus a 7 speed spacer. There might be some possibilities there.
Shimano do CS-HG50 Sora 8 speed cassettes in both 13-23 and 13-26.
They are categorised as from either T-group or V-group depending on which cassette you buy. In theory you are not supposed to mix groups (you could check which group your existing cassette belongs to and if it's a T or V then choose the corresponding one).
In reality it makes no discernable difference IMHO (in the past I mixed and matched 9spd Tiagra/Deore cassettes). In either of the above examples the first three sprockets appear identical (although you might want to check for yourself):
http://www.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/CS...
Both cassettes are currently in stock at Chain Reaction Cycles, for example, for £11.49.
Best wishes - W.
I don't know where you have been looking, but you can certainly find 8 speed Shimano cassettes starting with a 12 tooth sprocket. This might be suitable for you: http://www.sjscycles.co.uk/shimano-cs-hg200-8-speed-cassette-12-32t-prod36281/.