Other than oddly colored skinny jeans, roller bags, and goofy haircuts, the one thing that there's no shortage of at this year's Eurobike trade show is dropper posts. You can now add Eightpins to that list, but the Austrian company's product is unlike anything else on the market. The main difference lies in the fact that the post is integrated into the frame of a bike, as opposed to using the more typical double tube design. This design allowed Eightpins to use an oversized 33mm post diameter, and to offer up to 220mm of drop. A thru-axle runs through the seat tube and affixes the bottom portion of the unit in place, while a dust wiper occupies the portion where a seat post collar or quick release would normally sit.
Initially, the Eightpins post will only be available on Liteville bikes, but other companies have expressed interest in the design, and it may start appearing elsewhere as time goes on.
The amount of available drop will be dependent on frame size.
Height and Travel Adjustments
There will be four travel options, with either 150, 180, 200, of 220mm of drop. The maximum drop a rider can use will depend on their seattube length – since the post needs to go somewhere when the seat is in the fully lowered position, a post with 220mm of drop isn't likely to fit on a small frame.
With the Eightpins, adjusting your maximum saddle height isn't going to be quite as easy as opening up a quick release skewer, but then again, once it's set most riders probably won't need to fuss with their position too often. There's a 4mm hex bolt hidden under the seat clamp, and turning it counterclockwise frees the upper portion of the post. Once that's loosened up, simply move the post to the correct height and tighten the hex bolt back down again. That will now become the highest position the seat will reach. To achieve the maximum amount of drop, the seat post tube can be trimmed down with a saw or pipe cutter. The concept is a bit of a mind bender, but the key point to remember is that the seat height and the amount of drop can both be individually adjusted.
A small thumb lever controls the Eightpins dropper post.
The lower portion of the post is secured into the seat tube by a thru-axle.
The post is cable actuated, and relies on mechanical internals that allow it to be stopped every 6mm as it's raised or lowered. When the small bar mounted thumb lever is depressed, an air spring raises the post upwards.
In the event of a hard crash, the Eightpins seatpost is equipped with an overload clutch that allows it to rotate slightly to minimize any damage. Once you and the bike are done tumbling, the seat can be returned to its original position by hand.
Eightpins were definitely thinking outside of the box with this design, and it'll be interesting to see if any other manufacturers decide to adopt the technology. Now that dropper posts are nearly mandatory equipment for any mountain bike, a design like this may be the next logical step