The dropper post length is dependent on a couple of factors; the first being your saddle height and the second being the maximum seatpost insertion depth which you’ll find listed below. Using the values below and the charts supplied by the dropper post-manufacturer you will be able to figure out which dropper post length is best for you.
Slayer carbon: Size S = 245mm Size M = 265mm Size L = 285mm Size XL = 305mm | Slayer alloy: Size S = 240mm Size M = 270mm Size L = 272mm Size XL = mm |