Bicycle Cassette

I see bikes tapes that have numbers 12-30 and 10-35 as

What do these numbers mean?

The correct answer is true that the smaller number is the number of teeth on the smallest gear that tape. And of course, the greatest number is the number of teeth on the highest speed of the same tape. It has nothing to do with the rings of the chain before. They have their own figures.

If you ride in the flats, a large number, then you can use a cassette with fewer teeth than on the big wheel, like a 11-23. If you ride a lot, you will need a 12-27. It has everything to do with what you can grow, and if you have a triple chain ring or two in front, and the size of your trays in the front. Hope that helps.

They have to do with the number of teeth on a rack. Switching gears is then based on the rider will be in high gear, more difficult to push, or a lower speed, easier to push. The chain ring also has teeth, and accordingly make the ride easier or harder, again depending on the road or surface that you are riding on.

The smaller the # # of teeth on the cassette, the greater is the # # of teeth on the front sprocket. This is reguarding a BMX bike.