Seatposts

Funn alloy seatposts, seat clamps and dropper upgrades — from the twin-bolt Crossfire to the setback-adjustable Blockpass and the CNC UpDown dropper lever.

Get the diameter right first

Seatposts must match the frame's seat tube exactly — 27.2mm, 30.9mm and 31.6mm are the common sizes. The diameter is usually printed on your current post; if not, your frame specifications will list it. The Crossfire covers all three sizes, the Blockpass 30.9mm and 31.6mm.

Straight or setback

The Crossfire is the straight option: a twin-bolt head that locks saddle angle precisely, in 350mm or 400mm lengths at 265g to 295g. The Blockpass adds adjustable setback — 15mm, 20mm or 25mm, changed with a single oversized bolt — for riders who need the saddle further behind the bottom bracket than a straight post allows.

Running a dropper post?

The UpDown dropper lever upgrades the remote on most cable-actuated droppers — full-CNC at 53g, mountable left or right, top or bottom, and compatible with cable heads at either the lever or the post. Eight colours including oil slick. Our dropper lever guide covers compatibility in detail.

Do not forget the clamp

The Frodon seat clamp is machined from a single piece of AL6061 at 13g, in 31.8mm and 34.9mm. Size it to the frame's seat tube outer diameter — not the seatpost.