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Help a new roadie understant cassette config's

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Help a new roadie understant cassette config's

Old 06-09-07, 07:27 AM
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Mindless Drone
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Help a new roadie understant cassette config's

I am new to road biking, and biking in general and I need to get a new cassette for my bike, and I am trying to understand the different configs of cassettes and which one is best for me. I am going to be doing longer rides, with hills here and there but no major climbing. I was looking at a 12-25 config but have no idea if this is a good choice. I understand different configs have advantages and disadvantages in different situations but I am just not sure what.
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Old 06-09-07, 07:43 AM
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What do you have now? Are there hills on your rides now? Do you spin up them easily (cadence of 80-90+) or do you slowly slog up them (cadence of 60 or less)? Do you sometimes go so fast downhill that you can't spin your legs any faster even in your top gear?
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Old 06-09-07, 07:48 AM
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Well I am so out of shape right now that I slowly slog up hills so any help getting up hills would be great. I have yet to go all out down a hill so I can't answer that one.

I have no idea what I have now, but I am swithcing from 8 speed to 9 speed
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Old 06-09-07, 08:04 AM
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12/25 is a good all round riding cassette for most people

However, the only difference between a 12/25 and a 12/27 is that the lowest two gears on the latter are different. This makes it a good climbing cassette.

Since you are out of shape, on hills, and it doesn't sound like you intend to race, a racing cassette (11/23 or tighter) would probably not work well for you. What you want is some range between the top and the bottom number.

Do you have two rings or three in front? If you have 2, knowing nothing else about you, I'd really be inclined to recommend the 12/27. If you have 3, either the 12/25 or 12/27 should be fine.

To figure out what you have now, just count the number of teeth on the bottom and top cogs.
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Old 06-09-07, 08:07 AM
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If in doubt, I'd just get the 12-27. An extra low gear never hurts.
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Old 06-09-07, 08:21 AM
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If you're going from 8 to 9 speed, make sure your shifters and rear derailleur are compatible.
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Old 06-09-07, 06:39 PM
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Originally Posted by ridethecliche
If you're going from 8 to 9 speed, make sure your shifters and rear derailleur are compatible.
Yep I am getting a lightly used Ultegra 9 speed set. It comes with everything except the rear cassette and chain.
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Old 06-09-07, 06:40 PM
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Thanks for the feedback. I am going to go with a 12-27.
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Old 06-09-07, 07:30 PM
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Definitely a 12-27. I pedal a few thousand miles per year and still am frequently thankful (and use) my lowest (27) gear.
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Old 06-09-07, 08:57 PM
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