The Crankbrothers Highline 3 Dropper Post (170mm Travel, 31.6mm Diameter) offers an extended drop range, making it ideal for taller riders or modern frames with shorter seat tubes that allow for deep insertion.

Updated Specifications for 170mm Travel

Compared to shorter travel variants, the 170mm length features specific dimensions you must factor in for frame clearance:

• Total Length: 505mm from the base mechanism to the saddle rails at full extension.
• Travel (Drop): 170mm of infinitely adjustable height.
• Diameter: 31.6mm.
• Minimum Stack Height: Approximately 47mm from the bottom of the collar to the center of the saddle rails, maximizing your usable drop clearance.
• Weight: Roughly 605g–665g (slightly heavier than the 150mm version due to the longer upper and lower tubes).

Critical Fit Considerations

Before purchasing the 170mm travel version, verify your bike frame's compatibility:

1. Maximum Insertion Depth: Ensure your frame’s seat tube is straight and unobstructed for at least 285mm to completely slam the post collar down to the frame.
2. Maximum Extension: Measure your current saddle height from the frame collar to the saddle rails. If this distance is less than 220mm (170mm travel + 47mm stack height), this post will be too tall for you at full extension, and you should opt for the 150mm model instead.