The PRO Tharsis 3Five Dropper Post is a lightweight 100-millimetre, infinite-travel, dropper seatpost.

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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