AKM100CST cassette size

[jusmat01]

If I purchased a AKM100CST from topbikekit, there are options for different cassette sizes, which confuses me ( as when I change my cassette on my Turbo, I just use a little spacer ring to make it fit).
Is this different for these motor axles? Can I use a 9sp motor kit on my 9sp bike, and move it to a 7sp bike later or do I need a new fitting?

Thanks

 

[Nealh]

Cassettes are made to suit the chains they use so 7/8sp , 9sp & 10sp all use a different size chain. Each cassette will have different spacings and cog thickness to suit the chain. They all fit on a universal freehub and rely on the stack height being much the same.

 

[StuartsProjects]

The pitch, cog spacing, on most 'Shimano' cassettes is 5mm for 7/8 speed, 4.35mm for 9 speed and 3.95mm for 10 speed.

Campag stuff is different.

 

[jusmat01]

The pitch, cog spacing, on most 'Shimano' cassettes is 5mm for 7/8 speed, 4.35mm for 9 speed and 3.95mm for 10 speed.

Campag stuff is different.

Thanks, but my question was more about the Aikema cassette hub.

I might be getting confused. The option says Freewheel :9 speed (+$10). Does that mean they are actually supplying a 9 speed cassette for $10, or the motor accepts a 9 speed cassette? I might have just answered my own question. Its a whole (cheap unbranded) cassette.

 

[Nealh]

Thanks, but my question was more about the Aikema cassette hub.

I might have just answered my own question. Its a whole (cheap unbranded) cassette.

Yes , it will be a no name China branded one.

 

[vfr400]

I have one of those cassettes. The indexing doesn't quite match a Shimano shifter, so you might be better off getting a cassette that matches your derailleur/shifter.

 

[MontyPAS]

Thanks, but my question was more about the Aikema cassette hub.

I might be getting confused. The option says Freewheel :9 speed (+$10). Does that mean they are actually supplying a 9 speed cassette for $10, or the motor accepts a 9 speed cassette? I might have just answered my own question. Its a whole (cheap unbranded) cassette.

If it says freewheel, it is not a cassette?

 

[vfr400]

If it says freewheel, it is not a cassette?

It says freewheel, but it is a cassette.

 

[Nealh]

The motor is for cassette, the Chinese get the explanation wrong.

They confuse things by calling a freehub a freewheel hub and a cassette a freewheel cassette.