Fourstroke Series

The Fourstroke is built to exceed the demands of the fastest XC racers and to tackle the most brutal racecourses in the hunt for the win. And, with a legacy of Olympic, World Championship and World Cup podiums, winning is something it excels at.

XCO performance produced to exceed the demands of the world’s top racers.

A performance-focussed 100mm full-suspension bike, the Fourstroke is light on weight but heavy on features; all dedicated to keeping it – and you – in front of the competition. Using our premium-level carbon layup, top-tier components and exclusive integrated Autodrop seatpost, pedigree doesn’t come any faster.

Light is Good, Fast is Better

The Fourstroke’s Premium Carbon frame is an exercise in balancing weight, power transfer and control for a race bike that isn’t just light, it’s fast.

Perfection in Detail

The Fourstroke leaves nothing to chance. From the precise carbon layup matrix to the race-approved shock tune everything has been given the level of meticulous attention to detail a World Cup mechanic would approve of.

With great Power comes great Control

When you’re giving it all your bike should too. An efficient suspension system that transfers pedal power directly to the rear wheel while providing traction in the most challenging conditions means no Watt goes wasted.

Race proven Performance

With a several XCO and XCC victories under its belt, the Fourstroke has proven credentials as a race winner.

The Secret Weapon

Every rider’s all-new secret weapon, BMC Autodrop provides the first ever fully integrated, automatic dropper post. This revolutionary technology is featured on Fourstroke and enables on-the-fly and squat free seatpost dropping to push further faster.

Innovation & Technology

Autodrop

Most ‘dropper’ posts don’t actually drop when you activate them. Ours does. Created by the genius minds in BMC’s Skunk Works department, aka Impec Lab, and tested at the top level, Autodrop is a fully-integrated seatpost that drops, and rises, with the push of a lever.

Superior Kinematics

Tried. Tested. Refined. Raced. Our APS suspension remains the gold standard in stiffness, efficiency and traction. Eschewing the trend for stays that bend it delivers a measurable advantage in traction and feel.

Confidence at Speed

XC racing has evolved and so has what’s expected from race bike geometry. The Fourstroke is now longer and slacker to provide maximum confidence on the new-breed of technical race courses without losing any of its razor-sharp edge.

Precision Engineered

We’ve focussed on the details so you can focus on the ride. Fully guided cable routing and chainstay protection keep noise to a minimum and a rotation-limiting headset prevents damage to the frame when things go sideways.

Engineered in our Impec Lab and sharpened on the race circuit, Fourstroke is built around the 01 Premium Carbon frame for the ultimate efficiency and instant response on climbs, while progressive XC race geometry lends confidence when speed builds and lines blur.