Explaining the Cassette
A standard road cassette would be 11-25 made up of 8,9,10 or 11 rings ranging from the smallest with 11 teeth to the highest with 25 teeth. A cassette, being at the back, works with the smaller rings being for speed & the largest being for hills.
To cope with our terrain, and to improve performance on the hills, it makes sense to change the cassette to one with bigger rings such as an 11-28 or even an 11-30
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