The Trek Rail 9.9 XX1 AXS Gen 4 is the flagship of Trek's Rail platform — top-tier SRAM XX1 AXS wireless shifting on a carbon chassis built for the most demanding trail and enduro riding.
Key Features
- Carbon main frame for stiffness, control and strength on technical terrain
- SRAM XX1 AXS wireless drivetrain — confirmed in the Trek build spec
- Long-travel suspension geometry tuned for trail and all-mountain riding
- Trek e-MTB platform with integrated battery and high-output drive unit
- Built and serviced locally by the Mackay Cycles workshop
Why You'll Love It
When the brief is 'no compromise', this is the answer. Pioneer Valley to the Eungella escarpment to Finch Hatton — the Rail 9.9 XX1 AXS has the travel, the geometry and the drivetrain to handle whatever the day throws at it. It's the kind of bike that lets you do the rides you've been talking about — the longer loop, the steeper line, the second lap.
Tech Specs
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Frame: OCLV Mountain Carbon front and rear triangles, magnesium rocker link, 150 mm rear travel, ABP, Mino Link, removable battery, Knock Block
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Fork: RockShox ZEB Ultimate, DebonAir, Charger 3 RC2 damper, 44 mm offset, 160 mm travel
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Rear shock: RockShox Super Deluxe Ultimate Thru Shaft, 230 × 57.5 mm
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Motor: Bosch Performance Line CX (Smart System), 85 Nm, 250 W nominal — assists to 25 km/h (Australian e-bike standard)
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Battery: Bosch PowerTube 750 Wh Smart System (625 Wh on size S)
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Display: Bosch System Controller + Bosch Mini Remote BRC3300
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Drivetrain: SRAM XX1 Eagle AXS wireless 12-speed (AXS POD shifter, XX1 Eagle AXS derailleur, XG-1299 10-52 cassette, XX1 Eagle chain)
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Brakes: SRAM Code Silver Stealth 4-piston hydraulic disc, HS2 rotors 220 mm front / 200 mm rear
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Wheels: Bontrager Line Pro 30 carbon, tubeless-ready, TyreWiz
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Tyres: Bontrager SE6 Team Issue 29 × 2.5 front / SE5 Team Issue 29 × 2.5 rear, tubeless-ready
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Saddle / seatpost: Bontrager Verse Comp; RockShox Reverb AXS dropper (150–200 mm by size)
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Weight: ≈ 23.75 kg (size M, claimed)
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Sizes: S / M / L / XL
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