All-new BMC Fourstroke XC race bikes add magical 'Autodrop' seatpost

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All-new BMC Fourstroke XC race bikes add magical 'Autodrop' seatpost
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The new BMC Fourstroke family of cross country bikes isn’t just one bike, it’s three analog bikes, from a World Cup-winning pure XC race machine to a proper trail bike, with an affordable XC model sitting between them, plus a fourth model to yet to come. The headliner is the Fourstroke 01, with 100mm travel

The new BMC Fourstroke family of cross country bikes isn’t just one bike, it’s three analog bikes, from a World Cup-winning pure XC race machine to a proper trail bike, with an affordable XC model sitting between them, plus a fourth model to yet to come.

The next generation expands and improves upon the lightweight, race-oriented intentions with fully modern XC race bikes and another truly unique integrated dropper seatpost…The new Fourstroke 01 is meant to reinvent the cross-country category with updated suspension kinematics, dual bottle cage mounts on the downtube, and … Autodrop, a dropper seatpost that will drop on its own, no need for you to sit on it.The first is weight.

So BMC looked at other energy sources, and compressed air was the clear winner. It weighs nothing, and it works. The trick was getting it into a bike’s frame and making it work. The lever under the bar is the dropper remote. Push it lightly and it functions like a normal dropper. Push it a bit farther in to activate the Autodrop.

Or just take it to your local shop and ask them to follow the simple 60+ step instructional video. But seriously, they say it’s not that complicated. The rest of the design is lighter than before, but they were able to do that while keeping a dual linkage design. Where many brands have gone to a linkage-driven single-pivot bike to save weight, BMC tested that against their APS dual linkage and the clock. Combining lap times and power meter data, they found that their APS was a better solution, being plenty efficient and faster overall.

The top tube flattens on the underside to make room for remote cable attachment points, adjustment levers, etc.With the prior generation, the RAD seatpost added considerable cost, but was the only option. So, to make them more affordable, they had to really downgrade the spec. It doesn’t get the Autodrop dropper seatpost of the Fourstroke 01 models. And, unlike the prior model’s RAD seatpost, which was limited to 80mm drop, the new LT uses standard round dropper posts. Depending on frame size, you’ll get 125mm to 150mm of dropper travel.

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