Is this the future of dropper seatposts? Bionicon's B-Post is integrated into the frame

Dropper seatposts are mostly heavy, expensive and unreliable. What's the solution? This, according to Bionicon – a post that's integrated into the frame and uses simple mechanical internals and an air spring rather than complex hydraulics.

The B-Post has a target weight of just 300g – not much heavier than a standard alloy post and a full 250g lighter than a RockShox Reverb – and it looks pretty clean too, with no trailing remote cable. Contrary to some of the rumours floating around the web, the internals are housed in a cartridge that should be easy to remove if anything goes wrong.

Neat, right? Why isn't everyone doing it? Well, for starters, you need a compatible frame, with a hole in the seat tube for the remote cable and, we'd assume, a precisely machined inner surface for the shaft to slide into.

On top of that, a bit of DIY is required to set the prototype post to the correct rider height, which will have implications when selling the bike and won't suit riders who swap shoes, pedals or saddles a lot. The post on show at Eurobike also had a fair bit of lateral play, but Bionicon say that'll be eliminated by the time it reaches production.

It's good to see a company approaching things from a different angle, but it'll have to be a pretty amazing post to make people give up their Reverbs and Gravity Droppers.

Bionicon's B-Post certainly looks clean, but how will it perform? Picture by Dan Milner

A simple spring-loaded pin system allows you to run the B-Post fully up (150mm), with a small drop (120mm) or fully down. Picture by Dan Milner

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