Product Details
The PRO Tharsis 3Five Dropper Post is a lightweight 100-millimetre, infinite-travel, dropper seatpost.
Designed to provide you with a better sports’ bicycle experience the PRO Tharsis 3Five Dropper Post is a dropper post for weight conscious cross-country or endurance mountain bikers. It features 100-millimetres of infinite-travel, internal cable routing and is available in three diameters; 27.2-, 30.9- and 31.6-millimetres. The 27.2-millimetre version boasts a 3D forged construction with an AL6061 alloy lower and an AL7050 alloy shaft, with titanium bolts; which ensures that it tips the scales at just 405-grams. The 30.9- and 31.6-millimetre versions likewise boast a 3D forged construction; but with AL7075 lowers and an AL7050 shaft. The Tharsis 3Five Dropper has a new 2-bolt saddle clamp.
- Lightweight cross-country and endurance mountain biking dropper seatpost
- Featuring 100mm of infinite-travel
- 3D forged alloy construction
- Titanium bolts
- New collar
- Lighter cartridge
- Oval shaft inside shape
- Internal cable routing
- Diameters: 27.2, 30.9 and 31.6mm
- Weight: from 405g
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.
