Cassette Ratio

A_Sober_Paddy

Hey all,

Just wondering what's the smallest ring available on a cassette?

AltAccount

11

lennymc

i read the title as 'cassette radio'....

C3PO

lennymc wrote: »

i read the title as 'cassette radio'....

Showing your (our!) age ..... Half the people on here wouldn't even know what a "cassette radio" us!!

Captain Havoc

lennymc wrote: »

i read the title as 'cassette radio'....

I did the same.

NeedMoreGears

me too

seamus

I didn't, does that mean I'm not old?

redzerredzer

AltAccount wrote: »

11

Is 11 smaller than 10 ?

seamus

redzerredzer wrote: »

Is 11 smaller than 10 ?

Shimano actually produce a nine-tooth cassette, but it seems firmly aimed at the touring/commuting market to give more range when you've only got a single front chainring.

http://www.shimano.com/publish/content/global_cycle/en/sg/index/products/city___comfort_bike/capreo.html

As far as I can tell, there are nine and ten tooth systems out there, but I say "systems" - at the very least you will need to have your wheel built onto the system-specific hub in order to use the smaller cassette. You might need a new derailleur and chain too.

For standard production wheels using a Shimano or Campag freehub body, 11T seems to be the smallest you can get, as far as I can tell.

funkyjebus

seamus wrote: »

I didn't, does that mean I'm not old?

Afraid not, I know you're old or at least as old as me.

But nice try

funkyjebus

redzerredzer wrote: »

Is 11 smaller than 10 ?

slap/dash

redzerredzer wrote: »

Is 11 smaller than 10 ?

its one louder, innit?

slap/dash

i read it as a certain ratio.

Seweryn

lennymc wrote: »

i read the title as 'cassette radio'....

Anyone else here listen to their cassettes still? I do and the last time it happened it was on my car journey which I did last Saturday :-).

slap/dash

Seweryn wrote: »

Anyone else here listen to their cassettes still? I do and the last time it happened it was on my car journey which I did last Saturday :-).

yeah, sure. when it comes to some stuff that comes out as a demo, still savin those gems

A_Sober_Paddy

Just another quick cassette related question...

What determines the potential size of a cassette(i.e number of rings) is it the wheel or the frame?

Cee-Jay-Cee

A_Sober_Paddy wrote: »

Just another quick cassette related question...

What determines the potential size of a cassette(i.e number of rings) is it the wheel or the frame?

The bike manufacturer generally determines what spec cassette they fit to the bike. The wheel size has nothing to do with it. The frame has little to do with it either as a high ratio cassette can be fitted to literally any bike/frame.

A_Sober_Paddy

CJC999 wrote: »

The bike manufacturer generally determines what spec cassette they fit to the bike. The wheel size has nothing to do with it. The frame has little to do with it either as a high ratio cassette can be fitted to literally any bike/frame.

Well my current bike has an 8 speed, can I upgrade it to a 10 speed if i wished?

Plastik

A_Sober_Paddy wrote: »

Well my current bike has an 8 speed, can I upgrade it to a 10 speed if i wished?

Probably. But you'll need a 10 speed - cassette, chain, derailleur and shifters.

A_Sober_Paddy

Plastik wrote: »

Probably. But you'll need a 10 speed - cassette, chain, derailleur and shifters.

Yeah I understand that, its just for new wheels I'm thinking of getting, just want to make sure a 10 speed one will fit the bike, as my current groupset was originally a 10 speed, off another bike.

cdaly_

A_Sober_Paddy wrote: »

Well my current bike has an 8 speed, can I upgrade it to a 10 speed if i wished?

Only if your shifters are 10 speed. Otherwise you'll need to upgrade them too.

A_Sober_Paddy

cdaly_ wrote: »

Only if your shifters are 10 speed. Otherwise you'll need to upgrade them too.

Yeah the whole groupset is a 10 speed,

madtheory

This is the best place for info if you don't want to buy a good book:
http://sheldonbrown.com/

Plastik wrote: »

Probably. But you'll need a 10 speed - cassette, chain, derailleur and shifters.

The derailleur is not a factor if he wants to go smaller.

A_Sober_Paddy

madtheory wrote: »

This is the best place for info if you don't want to buy a good book:
http://sheldonbrown.com/


The derailleur is not a factor if he wants to go smaller.

Going bigger, not smaller

madtheory

OK well check the range of the derailer you have. All you need to know is on that site.

seamus

A_Sober_Paddy wrote: »

Yeah I understand that, its just for new wheels I'm thinking of getting, just want to make sure a 10 speed one will fit the bike, as my current groupset was originally a 10 speed, off another bike.

7-11 speed groupsets, cassettes, etc will typically fit on any standard bike. They're all built to a standard size, just the width of the chain varies. So the width of an 8-speed cassette is the same as the width of a 10-speed, just the spacing between cogs varies in order to fit in two additional cogs.

Seweryn

seamus wrote: »

7-11 speed groupsets, cassettes, etc will typically fit on any standard bike. They're all built to a standard size, just the width of the chain varies. So the width of an 8-speed cassette is the same as the width of a 10-speed, just the spacing between cogs varies in order to fit in two additional cogs.

Seamus, are you sure about the 7 speed? In the new bike I bought recently the 7-speed 105 hub and the cassette are narrower than the frame width, which is 130mm. The wheels and the groupset were fitted by the previous owner, so not sure about the history of this.

seamus

In some cases you may have to fit a small spacer on the freehub, but by and large yes afair 7-speed will fit on any shimano or sram compatible freehub.

The freehub body itself is the same width, but the total axle width my vary depending on the wheel. If he fitted a track wheel (120mm) in the frame, it'll be quite a bit smaller. Though track wheels don't have freehubs, I guess. He could have just messed about with the cones and spacers on the axles to make it slightly smaller.