Product Description
The TranzX JD-YSP39 is a dependable internally routed dropper seatpost for trail, all-mountain, and general MTB use.

This multi-variation listing offers 100mm, 150mm, and 170mm travel options, all with a 34.9mm seatpost diameter and Stealth internal cable routing. The post uses air-pressure actuation and a 2-bolt saddle head for secure, precise saddle positioning.

Choose the travel and overall length that best matches your frame clearance and riding position.

Variation Options

34.9mm x 355mm x 100mm Travel
34.9mm x 455mm x 150mm Travel
34.9mm x 490mm x 170mm Travel

Key Features

Remote-actuated dropper seatpost
Stealth internal cable routing
Air-pressure actuation
2-bolt saddle clamp
Zero offset
Aluminum construction
Multiple travel options for different frame and rider fit requirements

Specifications

Brand: TranzX
Model: JD-YSP39
Product Type: Dropper Seatpost
Diameter: 34.9mm
Travel Options: 100mm / 150mm / 170mm
Overall Length Options: 355mm / 455mm / 490mm
Offset: 0mm
Routing: Internal / Stealth
Actuation: Remote
Saddle Clamp: 2-Bolt
Rail Compatibility: Universal
Material: Aluminum
Color: Black

Size Guide

Diameter	Overall Length	Travel
34.9mm	355mm	100mm
34.9mm	455mm	150mm
34.9mm	490mm	170mm

Compatibility
Designed for compatible mountain bike frames using a 34.9mm seatpost diameter and internal dropper cable routing.

Before ordering, confirm:

Seat tube diameter
Maximum insertion depth
Available frame clearance
Desired saddle height
Required dropper travel

Longer-travel versions require more available insertion depth and exposed post length than shorter versions.

Included

One TranzX JD-YSP39 dropper seatpost in the selected size

Remote lever, cable, housing, and other installation hardware are included only if pictured or specifically stated.

Condition

New
Non-retail packaged