I don't understand the Gradation of sprocket sizes:

16, 12, 13, 14, 15, 30, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 31, 32, 11, 27, 28, 29
16, 12, 13, 14, 15, 30, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 31, 32, 33, 34, 11, 27, 28, 29

I understand that there are two model 9v: 11/32 and 11/34. But what are all the other numbers? Is there a correspondence with the front plate sizes?

I would like to mount this cassette to replace an old XT outside 11/32 -- 11,12,14,16,18,22,24,28,32 with 22/32/44 front chainrings...

Question

I don't understand the Gradation of sprocket sizes:

16, 12, 13, 14, 15, 30, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 31, 32, 11, 27, 28, 29
16, 12, 13, 14, 15, 30, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 31, 32, 33, 34, 11, 27, 28, 29

I understand that there are two model 9v: 11/32 and 11/34. But what are all the other numbers? Is there a correspondence with the front plate sizes?

I would like to mount this cassette to replace an old XT outside 11/32 --> 11,12,14,16,18,22,24,28,32 with 22/32/44 front chainrings...

Answer

I contacted our product department for a technical explanation, they informed me that the numbers simply represent the number of "teeth" at each level. 

What is important to consider is that the more "teeth" the easier it is to shift gears and make pedalling easier on climbs and more complicated terrain. Whereas chainrings with larger spacing are preferable for road cycling.

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