You Can't Lose
We've made three versions of the new Stumpjumper to give every kind of rider the best bike imaginable. The Short Travel (or ST) is snappy and nimble, while the Stumpjumper rides fast and planted. And for anyone that eats and sleeps gravity riding, we've brought back the EVO in all its slacked-out glory.
Stumpjumper & Stumpjumper ST
'All mountain'—as in 'the entire mountain.' To ride it, you can't put limits on climbs or descents—just be ready to ride where the trail takes you. This means that your trail bike must be equal parts lightweight & durable for scaling climbs and navigating seemingly endless downhill terrain. Our trail bikes meet this challenge head-on, so call it 'all mountain' or a 'one quiver bike'—we'll just call it the right tool for the job.
All-New Sidearm Frame
We pulled out all the stops to lighten and stiffen up the frame, and what we arrived at was a vastly more efficient structure with a new sidearm design. The sidearm design directly connects all three mounting points of the rear-end and shock to the frame, and this creates a significant increase in both stiffness and performance over bumps. More explicitly, frame flex has been minimized when the rear suspension is active. In CAD, we were able to put the new 3D shape against the last iteration of the Stumpjumper, and with Finite Element Analysis (FEA), we were able to prove that the new layout was 20% more efficient. At the end of all of this, we've ended up with one of the lightest trail frames on the market.
A New Frame Yields a New Approach
With over two decades of experience with FSR, we refined our proven design. We love it, because FSR allows us to tune every part of the suspension with the least amount of compromises. Bike suspension is a marriage between the frame kinematics and the shock, after all. And given that we have our own Suspension Team (led by the King of Suspension, Mike McAndrews), we had them working hand-in-hand with the frame engineers on the bike design from day one. Because of this union, we're now able to rely more on the frame kinematics and less on the shock damper to perfect the Stumpjumper's ride quality. The end result? The Stumpjumper is supple over small bumps, yet it possesses a firm mid-stroke and exceptional bottom-out support. This is the suspension that makes the Ultimate Trail Bike.
The Flip Chip allows you to change the frame geometry with ease, all to support your riding style. There are two settings, High and Low, and when you "flip the chip," you effectively change the bottom bracket height by 6mm and the head tube angle by half-a-degree.