Product Details
TranzX SP39J Internal Dropper Seatpost 200mm Travel 34.9mm Diameter
The TranzX SP39J Internal Dropper Seatpost is designed for modern mountain bikes that require a larger 34.9mm seatpost diameter and maximum saddle drop for aggressive trail and enduro riding.
Featuring clean internal cable routing, the SP39J keeps your bike looking tidy while protecting the cable from dirt and trail debris. The post is constructed from high-strength 7075 aluminium, delivering durability and reliable performance on demanding terrain.
With up to 200mm of dropper travel, riders can quickly lower their saddle for technical descents and raise it again for efficient climbing. The hard anodised shaft improves durability and helps maintain smooth operation over time.
A handlebar dropper lever is included, allowing fast and easy saddle height adjustment while riding.
Key Features:
- Internal cable routed dropper seatpost
- 200mm saddle height adjustment travel
- Large 34.9mm diameter for modern MTB frames
- Strong and lightweight 7075 aluminium construction
- 0mm offset saddle clamp design
- Hard anodised shaft for durability
- Polished black finish
- Handlebar dropper lever included
Specifications:
Material: Alloy #7075-T651
Offset: 0mm
Diameter: 34.9mm
Length: 556mm
Travel: 200mm
Max Frame Insertion: 305mm
Finish: Polished Black
Shaft Finish: Hard Anodised Black
What Sets Alchemy Apart
The best pre-owned bikes
When you buy a pre-owned bike from Alchemy Cycle Trader, you’re getting more than just a great deal. Every bike is roadworthy certified, comes with a 3-month warranty, and includes your first service free - so you can ride away with complete confidence.
Buy with confidence
In-house Active Thermography Carbon Fibre Testing for extra peace of mind on pre-owned bikes.
Learn more about our carbon testing.
Expert Servicing & Ongoing Support
Our professional workshop team is here to keep your bike running at its best long after you’ve taken it home. From routine servicing to performance tuning, our qualified mechanics ensure your ride stays smooth, safe, and ready for every adventure. Whether it’s your first free service or future maintenance, you can count on Alchemy Cycle Trader for trusted support and expert care. Learn more about our workshop services.
