I bought a Bianchi for 40 bucks that a guy used to use for crit racing. (The bike iD stamped on the head tube is 0125633 -- I don't know what this means, or how this would help me date the bike).
The back cassette has only big gears (no pixie gears for heavy climbing). I want to switch the cassetes, but I'm a novice about sizing. I measured the largest sprocket on the cassette and it is 90 mm. The largest sprockets on my touring bike are quite a bit larger, and I think that's what I need.
My question: the 90 mm cassette doesn't correspond to the sizes I see advertised. I see a cassette of 11-28, 12-21, for example, but I don't see how these relate to 90mm.
"Michael" <[email hidden]> wrote in news:F_fXa.59639$o27.1329609 @twister.rdc-kc.rr.com:
Quoted message said:
My question: the 90 mm cassette doesn't correspond to the sizes I see advertised. I see a cassette of 11-28, 12-21, for example, but I don't see how these relate to 90mm.
A 12-21 cassette has a small cog with 12 teeth and a large cog with 21 teeth. The number of teeth should be stamped somewhere on each cog, or you can just count them.
The 11-28 and 12-21 numbers you see refer to the amount of teeth on the largest and smallest gears. The gears in between will have a difference of one or two teeth. The numbers are usually stamped on the gear but are difficult to see. BTW, if you switch cassettes you will want to replace the chain at the same time to avoid problems.
Glenn
"Michael" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
I have a question on cassette sizing.
I bought a Bianchi for 40 bucks that a guy used to use for crit racing. (The bike iD stamped on the head tube is 0125633 -- I don't know what this means, or how this would help me date the bike).
The back cassette has only big gears (no pixie gears for heavy climbing). I want to switch the cassetes, but I'm a novice about sizing. I measured the largest sprocket on the cassette and it is 90 mm. The largest sprockets on my touring bike are quite a bit larger, and I think that's what I need.
My question: the 90 mm cassette doesn't correspond to the sizes I see advertised. I see a cassette of 11-28, 12-21, for example, but I don't see how these relate to 90mm.
In article <[email hidden]>, mdw3- [email hidden] says...
Quoted message said:
I have a question on cassette sizing.
I bought a Bianchi for 40 bucks that a guy used to use for crit racing. (The bike iD stamped on the head tube is 0125633 -- I don't know what this means, or how this would help me date the bike).
The back cassette has only big gears (no pixie gears for heavy climbing). I want to switch the cassetes, but I'm a novice about sizing. I measured the largest sprocket on the cassette and it is 90 mm. The largest sprockets on my touring bike are quite a bit larger, and I think that's what I need.
My question: the 90 mm cassette doesn't correspond to the sizes I see advertised. I see a cassette of 11-28, 12-21, for example, but I don't see how these relate to 90mm.
Just count the teeth instead of measuring the size; that's what those numbers mean.
-- Dave Kerber Fight spam: remove the ns_ from the return address before replying!
The back cassette has only big gears (no pixie gears for heavy climbing).
Others have explained how to count teeth but I have a question- am I the only rider that's never heard of a "pixie gear"? That's a real question. It's a phrase I've never run across and I'm just curious.
(Hunrobe) from AOL url='http://www.aol.com/'http://www.aol.com/url said:
Others have explained how to count teeth but I have a question- am I the only rider that's never heard of a "pixie gear"? That's a real question. It's a phrase I've never run across and I'm just curious.
It's the same as a granny gear, but this is the first I've heard it, too.
-- home.sport.rr.comcuthuluOpen ↗ human rights = peace My face is new, my license is expired, and I'm under a doctor's care!!!! 8:46:22 PM 5 August 2003
The back cassette has only big gears (no pixie gears for heavy climbing).
Others have explained how to count teeth but I have a question- am I the only rider that's never heard of a "pixie gear"? That's a real question. It's a phrase I've never run across and I'm just curious.
If he said "fairy gears" perhaps that would be more obvious.
Others have explained how to count teeth but I have a question-am I the only rider that's never heard of a "pixie gear"? That's a real question. It's a phrase I've never run across and I'm just curious.
