Trek Rail 9.9 CX Race Gen 4
The Rail 9.9 CXR is a race-ready long-travel e-bike that's ready to accelerate to the full right off the the starting line. It features our best carbon frame, smooth RockShox suspension and top-tier Shimano XTR drivetrain. But the real show stealer on this powerhouse is the limited-edition Bosch Performance Line CXR motor that accelerates faster and offers sustained power for ripping through rock gardens without pedalling. It's equipped with an extra-long range battery and smart system, plus the new Mini Remote and System Controller display that sits flush with the top tube and pairs with the eBike Flow app to give you activity tracking, navigation and Bluetooth connectivity.
It's right for you if...
You want seriously fast acceleration and the best long-travel e-MTB you can find. Components matter to you, and you want the most adjustability, smoothest performance, longest range and most high-tech assist you can get. You love customisation and want all of the cool features of Bosch's smart system.
The tech you get
An upgraded OCLV Mountain Carbon frame with longer reach and oversized head tube and seat tube for maximum strength. An extra-long-range 750 Wh battery, ultra-adjustable RockShox ZEB Ultimate fork, RockShox Super Deluxe Ultimate Thru Shaft shock, ultra-responsive Shimano XTR 1x12 drivetrain and burly but light carbon wheels. Bosch's new limited-edition Performance Line CXR motor with faster acceleration and extended boost, a new Mini Remote, and Bluetooth® System Controller display that's integrated into the top tube.
The final word
Rail 9.9 CXR is all about power. It combines top-shelf tech with Bosch's ultra-fast accelerating, limited-edition, Performance Line CXR motor for cruising out of corners at top speed, and their biggest battery possible to power you, lap after lap. RockShox's best enduro fork, the super-refined shifting of XTR, an updated frame and AirWiz pressure monitoring come together to make it the full package for e-MTB racing.
| Frame | OCLV Mountain Carbon main frame, 1.8'' lower head tube, Bosch System Controller-compatible, Removable Integrated Battery (RIB), Knock Block 2.0, guided internal routing, 34.9 mm seat tube, magnesium rocker link, Motor Armour, Mino Link, ABP, Boost148, 12 mm thru-axle, 150 mm travel |
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| Fork | RockShox ZEB Ultimate, AirWiz, DebonAir spring, Charger 3 RC2 damper, 1.8" oversized tapered steerer, eMTB optimised crown, 44 mm offset, Boost110, 15 mm Maxle Stealth, 160 mm travel |
| Shock | RockShox Super Deluxe Thru Shaft, AirWiz, 230 mm x 57.5 mm |
| Max compatible fork travel | 170mm (580mm axle-to-crown) |
| Wheel front | Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless-Ready, 6-bolt, Boost110, 15 mm thru-axle |
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| Wheel rear | Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost 148, 12 mm thru axle |
| Skewer rear | Bontrager Switch thru-axle, removable lever |
| *Tyre |
Size: S, M, L, XL Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50" |
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Size: S, M, L, XL Bontrager SE6 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50" |
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| *Tyre part |
Size: S, M, L, XL Bontrager TLR sealant, 180 ml/6 oz |
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Size: S, M, L, XL Quarq TyreWiz tyre pressure monitors |
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| Max tyre size | Frame: 29x2.60" Fork: See manufacturer |
| Shifter | Shimano XTR M9100, 12 speed |
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| Rear derailleur | Shimano XTR M9100, Shadow Plus, long cage, 51-T max cog |
| Crank arm | E*thirteen E*spec Race carbon, 34T, 165 mm length |
| Chainring | E*thirteen E*spec, 34T alloy, 55 mm chainline |
| Cassette | Shimano XTR M9101, 10-51, 12-speed |
| Chain | Shimano Dura-Ace/XTR M9100, 12 speed |
| Pedal | Wellgo VPE-536 |
| Max. chainring size | 34T |
| Saddle | Bontrager Arvada, austenite rails, 138 mm width |
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| *Seatpost |
Size: S Bontrager Line Elite Dropper, 100 mm travel, MaxFlow, internal routing, 34.9 mm, 345 mm length |
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Size: M Bontrager Line Elite Dropper, 150 mm travel, MaxFlow, internal routing, 34.9 mm, 440 mm length |
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Size: L Bontrager Line Elite Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 485 mm length |
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Size: XL Bontrager Line Elite Dropper, 200 mm travel, MaxFlow, internal routing, 34.9 mm, 550 mm length |
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| Handlebar | Bontrager Line Pro, OCLV Carbon, 35 mm, 27.5 mm rise, 780 mm width |
| Grips | Bontrager XR Trail Elite, nylon lock-on |
| Stem | Bontrager Line Pro, 35 mm, Knock Block, Blendr-compatible, 0-degree, 45 mm length |
| Brake | Shimano XTR M9120 4-piston hydraulic disc |
| Brake rotor | Shimano RT86, 6-bolt, 203 mm |
| Rotor size | Max brake rotor sizes: Front see fork manufacturer, rear 200mm |
| *Battery |
Size: S Bosch PowerTube 625Wh, smart system |
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Size: M, L, XL Bosch PowerTube 750Wh, smart system |
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| Charger | Bosch standard 4A, 230V, smart system |
| *Controller |
Size: S, M, L, XL Bosch System Controller BRC3100, smart system |
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Size: S, M, L, XL Bosch Mini Remote BRC3300, smart system, 22.2 mm |
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| Motor | Bosch Performance Line CX Race Edition, smart system, magnesium motor body, 85 Nm, 20 mph or 32 km/h max assist (25 km/h max assist in EU and APAC) |
| Weight | M - 23.05 kg / 50.82 lb |
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| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
