Originally Posted by
camper8
What cassette would I be best to buy please to put on my spare wheels which will help me maximise my speed on the flat. Thanks
Don't overthink this.
1. Count the number of cogs on your cassette. You want your new cassette to have the same number.
2. Most cassettes will come with an 11 tooth or 12 tooth smallest (high) gear. On a flat road you probably won't be using the 11 tooth cog very much.
3. Do you have any hills at all? Make sure your largest cog is big enough to climb your steepest hill comfortably.
4. On a flat road, you'll want to have a bunch of gears that are spaced real closely together. That lets you keep your pedaling speed constant while making minor gearing adjustments for wind or road contours.