The OB1: Dropper Post Sizing Chart

Frame Size XS (48) S (51) M (54) L (57) XL (60)
Dropper Option 1: 360mm
Length/Travel 360/90
Seatpost Min Insertion - 140 140 140 140
Frame Max Insertion - 188 197 197 197
Min Saddle Height** - 692 713 743 773
Max Saddle Height** - 730 760 790 820
Dropper Option 2: 405mm
Length/Travel 405/105
Seatpost Min Insertion - - 160 160 160
Frame Max Insertion - - 208 229 229
Min Saddle Height** - - 752 761 791
Max Saddle Height** - - 790 820 850
**From Center of BB At Full Extension using our stock saddle. Exact figures depend on saddle's positioning and rider's positioning on it. Other saddles may have different stack heights. Please choose the option (if any) that puts you closest to the upper middle of the min-max saddle height range. Because of the number of variables involved, we cannot guarantee that riders at the extremes of these ranges for a given dropper/frame combination will be able to achieve optimal fit. Please contact us with your order # after purchasing if you are uncertain and we'll help confirm or modify your order as needed.