Among today’s top-tier enduro bikes, the Trek Slash 9.9 XX AXS T-Type Gen 6 leads the pack with cutting-edge design and unmatched capability. With a blend of cutting-edge technology, a revolutionary suspension platform, and top-tier components, this bike is purpose-built for aggressive riders who demand speed, efficiency, and confidence in every line they choose.
Whether you’re racing the clock in the Enduro World Series or sending big mountain terrain, the Slash 9.9 XX AXS Gen 6 is designed to handle the worst conditions and the gnarliest trails with finesse and power.
What Is the Trek Slash 9.9 XX AXS Gen 6?
The Trek Slash 9.9 XX AXS T-Type Gen 6 is Trek’s top-spec enduro bike, built around a completely redesigned OCLV Mountain Carbon frame and a high-pivot rear suspension layout. With 170mm of front travel and 160mm in the rear, it’s made for serious descending and enduro racing—but it doesn’t stop there. It climbs efficiently, maintains stability at high speeds, and boasts some of the most advanced tech available today.
What sets the 9.9 XX AXS model apart is its SRAM XX Eagle AXS Transmission, carbon wheels, high-end suspension, and lightweight yet bombproof components. It’s the very best Trek offers for enduro riders.
Trek Slash 9.9 XX AXS T-Type Gen 6 Review
Frame and Geometry: Aggressive, Yet Refined
The heart of this bike is the Gen 6 Slash frame, made from Trek’s lightweight OCLV Mountain Carbon and re-engineered with a high-pivot suspension platform. This new layout dramatically improves rear-wheel tracking over rough terrain and increases rearward axle path for better compliance during hits.
Its geometry is both aggressive and adjustable:
- 63.5° head angle (slack for high-speed stability)
- 77° seat tube angle (steep for climbing)
- Longer reach and adjustable chainstays (440–450mm)
- It supports both 29” wheels and mullet setups, allowing riders to tweak the ride feel based on terrain or personal preference.
Features like internal storage, durable frame protection, and Knock Block 2.0 enhance practicality without sacrificing speed or handling.
Suspension: Plush and Responsive
The bike boasts elite-level RockShox equipment, ensuring smooth and responsive suspension:
- RockShox ZEB Ultimate RC2 fork (170mm) with ButterCups and Charger 3 damper
- Super Deluxe Ultimate rear shock (160mm) with custom tuning and hydraulic bottom-out control
This suspension setup delivers ultra-smooth performance on rough descents, with excellent traction, small bump sensitivity, and big-hit stability. The high-pivot design adds even more control through rock gardens and technical features, and the rear idler keeps pedaling smoothly under power.
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Drivetrain: SRAM XX AXS T-Type Transmission
The SRAM XX Eagle AXS T-Type Transmission is SRAM’s most advanced drivetrain yet—wireless, ultra-durable, and built around the UDH (Universal Derailleur Hanger) standard. It allows for flawless, load-tolerant shifting and a direct-mount rear derailleur that’s nearly indestructible.
With a carbon crankset and precise chain management, this drivetrain doesn’t just perform—it lasts longer, shifts under load, and needs less maintenance.
Why it’s a standout:
- Shifts reliably under full power
- Clean cable-free setup
- Easily integrates with SRAM AXS app and RockShox Flight Attendant (if upgraded)
Wheels and Tires: Fast, Tough, and Tubeless-Ready
This model rolls on Bontrager Line Pro 30 carbon wheels, optimized for aggressive trail riding. They’re lightweight, stiff, and durable—helping you accelerate quickly and hold lines through corners and off-camber sections.
The tires? Bontrager SE5 Team Issue—grippy, aggressive, and built for enduro. These provide outstanding control through corners and durable defense against flats.
Brakes: Powerful and Consistent
To match the aggressive intentions of the bike, Trek includes SRAM Code Ultimate 4-piston hydraulic brakes, delivering excellent power with refined modulation. Combined with 200mm rotors front and rear, the Slash can stop on a dime, no matter how fast you’re descending.
Climbing Capability: Surprisingly Efficient
Despite being a 160/170mm bike, the Slash 9.9 XX AXS climbs with impressive efficiency. With its aggressive seat angle and high-pivot setup featuring an idler, the bike remains composed and reactive on challenging uphill sections.
You won’t mistake it for a cross-country bike but for something built to fly downhill, it climbs better than most of its peers.
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Descending Performance: Built for Speed and Control
This is where the Slash 9.9 XX AXS truly shines. From fast bike park laps to steep alpine descents, it feels planted, composed, and confidence-inspiring. The high-pivot rear suspension improves traction and control, while the stiff carbon frame ensures precise handling.
Whether you’re hitting chunky rock gardens or floating over roots at high speed, this bike eats it all up with grace.
Key Features and Highlights
- UHD-compatible frame with in-frame storage
- The high-pivot system promotes better compliance by directing axle movement rearward, aiding in stability and control.
- SRAM XX AXS T-Type drivetrain with carbon crankset
- RockShox ZEB Ultimate + Super Deluxe Ultimate suspension
- Bontrager Line Pro 30 carbon wheels
- Integrated protection, Knock Block 2.0, and bash guard
- Who Should Ride the Trek Slash 9.9 XX AXS?
This bike is for serious enduro racers, bike park senders, and aggressive trail riders who want the absolute best in performance, reliability, and future-proof tech. If you’re the type who pushes limits on every descent and doesn’t want to compromise on componentry, the Slash 9.9 XX AXS is made for you.
You will love this bike if you:
- Want pro-level geometry and components
- Ride hard, fast, and technical terrain
- Value cutting-edge wireless tech and carbon everything
- Want a mullet or full 29” setup for versatility
Conclusion: A No-Compromise Enduro Weapon
The Trek Slash 9.9 XX AXS T-Type Gen 6 is one of the most advanced, aggressive, and refined enduro bikes available in 2025. From its cutting-edge drivetrain and carbon chassis to its next-gen suspension platform, this bike is made for riders who demand excellence in every corner, climb, and drop.
It’s fast, futuristic, and ferociously fun if you can handle the price tag, this is as close to perfection as enduro bikes get.