We designed the Stereo Hybrid ONE77 HPC AT 800 for high mountains. Its mullet setup with a 29 inch front wheel and a 27.5 inch rear wheel offers the perfect blend of control and agility. Additionally, with the adjustable head tube angle, you can easily adjust the geometry to suit the terrain or your riding style. Our proven four-bar suspension system (FSP 4-Link), with 170 millimeters of travel, is paired with a Float X2 shock. Up front, a Fox 38 Grip X2 fork is also equipped with 170 millimeters of travel. A powerful Bosch CX motor provides the assistance, with a large 800 Wh battery supplying the necessary power. When it comes to transferring that power to the rear wheel, nothing beats the twelve gears of Sram's X0 Eagle Transmission. And you can always rely on the Shimano XT four-piston brakes. The rolling mass consists of a set of sturdy Newmen Beskar 30 wheels, with a Schwalbe Magic Mary tire on the 29 inch front wheel and a Tacky Chan on the 27.5 inch rear wheel, both 2.4 inches wide. With this setup, you’re prepared for whatever the mountain throws at you.
E-System (Bosch Smart System)
Drive Unit: Bosch Performance Line CX (Gen 5), 85Nm (Software upgradeable to 100Nm), 250W.
Battery: Bosch PowerTube 800 (Highest capacity available, fully integrated).
Display: Bosch Purion 400 (A compact, crisp color display tucked behind the bars) + System Controller (Top-tube integrated).
Remote: Bosch Mini Remote (Minimalist Bluetooth handlebar toggle).
Special Tech: eMTB+ Mode (Combines the natural feel of eMTB mode with the raw punch of Race mode).
Frameset & Suspension
Frame: C:62® Monocoque Carbon (Front), Aluminum 6061 T6 (Rear), 170mm Travel, Agile Trail Geometry, UDH, Advanced Internal Cable Routing (ICR).
Fork: Fox 38 Float Factory GRIPX2, Tapered, Kashima Coated, 170mm Travel.
Shock: Fox Float X2 Factory, 230x65mm, Kashima Coated, 2-Position Lever.
Seatpost: Fox Transfer Factory Dropper Post, Kashima Coated, 31.6mm.
Color: Carbon 'n' Gold
Drivetrain & Brakes
Rear Derailleur: SRAM X0 Eagle AXS™ Transmission, 12-Speed, Wireless Electronic.
Shifters: SRAM AXS™ Pod Controller (Ergonomic wireless shifting).
Brake System: Shimano XT BR-M8120, Hydraulic Disc, 4-Piston.
Rotors: 203mm (Front) / 203mm (Rear).
Crankset: ACID MTB Hybrid Pro, 36T.
Cassette: SRAM XS-1275, 10-52T (Full T-Type compatibility).
Wheels & Tires
Wheelset: Newmen Beskar 30 base/strong, 28/32 Spokes, Tubeless Ready (Mullet Setup: 29" F / 27.5" R).
Front Tire: Schwalbe Magic Mary, Addix Soft, Super Trail, 2.4".
Rear Tire: Schwalbe Tacky Chan, Addix Soft, Super Gravity, 2.4".
Key Highlights
SRAM X0 Transmission: The 2025 model features the T-Type "Direct Mount" derailleur. It’s nearly indestructible because it mounts directly to the frame's axle, and it actually shifts better the harder you pedal.
The Purion 400 + Mini Remote: This was the major cockpit upgrade for 2025. It keeps the center of your bars completely empty for a cleaner look and less risk of damage in a crash.
GRIPX2 Damping: The Fox 38 Factory fork was updated for this model year with the GRIPX2 damper, offering significantly more adjustment and better "mid-stroke" support than previous versions.
100Nm Capability: While it ships at 85Nm, the 2025 Gen 5 motor is designed to be unlocked via the Bosch Flow App to reach 100Nm of peak torque, perfect for cleaning technical climbs.