When the trail demands a quick, efficient and agile weapon, the STUMPJUMPER hardtail answers the call. With numerous World and National Championships to its name, this pure-bread cross-country machine is available in both carbon fiber and alloy frame options, and is equipped with a 90mm-travel suspension fork and fast-rolling 29-inch wheels to smooth rough terrain.
WHAT Light, stiff M5 alloy frame with shaped seatstays, PF30 BB, tapered
head tube assembly, and Competitive
WHY To offer best stiffness-to-weight ratio in its class on a tight budget without sacrificing vertical compliance. Results in high performance
with a smooth, controlled ride.
HOW M5 alloy frame is hydroformed to create the optimal shape for each tube’s function. The geometry—coupled with a tapered head tube assembly, PF30 BB and short chainstays—provides
quick, responsive handling and acceleration.
The sculpted seatstays have a flatter surface on top and bottom which, increases vertical compliance for comfort but maintains torsionally rigidity.
CUSTOM ROCKSHOX SID BRAIN FORK
WHAT 90mm-travel Brain-modulated fork on mid to high-end models, with dropouts compatible
with our proprietary OS28 end caps.
WHY Delivers the most efficient climbing
and out-of-the-saddle acceleration, while retaining smooth, active suspension when taking hits.
HOW Brain technology (inside the fork) senses the difference between actual bumps and pedalling force, using an inertia valve and oil flow to regulate suspension. When a rider stands to accelerate, the fork immediately stiffens up, eliminating rider “bob.” But, when taking a hit from a rock or a root, the
fork is allowed to compress accordingly. OS28 end caps make the interface between the hub and fork considerably stiffer than standard QRs, making the fork even more efficient and responsive.
FACT IS CARBON FRAME
WHAT Ultralight FACT IS carbon frame
with shaped seatstays, Competitive XC geometry, and slim seatpost.
WHY Keeps the bike remarkably light—29er frame weighs less than 1100 grams!—without sacrificing torsional stiffness or vertical compliance. Results in increased speed, comfort, and control over rough terrain.
HOW FACT IS construction lets us create complex carbon shapes that maximize stiffness and minimize weight and stress/ alignment issues. The geometry—featuring our tapered headtube and short chainstays—provides superior handling and snappy acceleration. The shaped seatstays and slimmer seatpost increase vertical compliance.
WHAT Roval Control SL 29 wheelsets (S-Works model) and Roval Control
Carbon 29 wheelset (Marathon model).
WHY Reduces weight, increases stiffness and durability, and absorbs impact better than alloy wheels.
HOW We designed ultra-lightweight, carbon 29er wheelsets with wide rims
to accept large-volume tires. The carbon rim is stronger and stiffer than alloy, so the wheels remain in-true longer, and absorb impact better. The combination of cross-laced and radial-laced spokes also reduces weight and improves overall strength.