New Arrivals/Restock

Rail 9.9 is our best long-travel electric mountain bike. You get an extra-beefy carbon frame, unbelievably smooth RockShox suspension, super-precise Shimano XTR drivetrain, and a powerful Bosch Performance Line CX motor with an extra-long range battery and the new smart system LED remote and Kiox display that pair with the eBike Flow app to give you activity tracking, navigation, and Bluetooth connectivity.

• Boschs new smart system gives you all the same power and responsiveness with a new Bluetooth-connected LED remote and eBike Flow app that puts even more control and customization at your fingertips
• TyreWiz and AirWiz let you confirm your tires, fork, and shock are at the right pressure at a glance. No more getting the pump or gauge out just to check
• RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
• The new frame is extra stout with a 34.9mm seat tube to accommodate more robust dropper posts, and an oversized head tube that works with burly eMTB-optimized forks for less flex and more precise steering
• Treks Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy remove the battery without tools and lets you mount a water bottle cage

Bosch smart system

The new Bosch smart system gives you an eMTB thats more connected than ever. The new LED remote connects with the new Bosch eBike Flow app via Bluetooth. You get tons of useful features at your fingers, and over-the-air system upgrades.

Bosch eBike Flow app

The new eBike Flow app turns your ride into a personalized experience. Use it to customize your motors assist behavior, track your ride stats, and integrate your data with apps like Strava and Apple Health. Theres even handy features like navigation and service reminders.

Removable Integrated Battery

RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. It’s the most convenient way to remove your battery for transport, security, or just easier charging.

RockShox AirWiz and Quarq TireWiz

TyreWiz monitors your tire pressure while AirWiz monitors your fork and shock pressure. Set your desired pressure in the SRAM AXS app and then just check the lights before each ride—red means you need a pump, green means go ride.

RockShox Super Deluxe with Thru Shaft

With the all-new RockShox Super Deluxe Ultimate Thru Shaft, you get the most refined shock on the market, with an updated air spring and an exclusive Thru Shaft damper that gives you tenacious grip, plush control, and the support you need for ripping rough descents all day.

What is the range?

To see how far you can ride your electric mountain bike on a single charge, check out Bosch’s range calculator. We’ve auto-filled the variables for this bike model and the average rider, but you can make adjustments to get your most accurate estimate.

Frame	NEW OCLV Mountain Carbon main frame, 1.8 lower head tube, Removable Integrated Battery (RIB), Knock Block 2.0, guided internal routing, 34.9mm seat tube, magnesium rocker link, Motor Armor, Mino Link, ABP, Boost148, 12mm thru axle, 150mm travel
Fork	RockShox ZEB Ultimate, AirWiz, DebonAir spring, Charger 2.1 RC2 damper, e-MTB optimzed crown, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 160mm travel
Shock	RockShox Super Deluxe Thru Shaft, AirWiz, 230mm x 57.5mm
Wheel Front	Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29 /
Wheel Rear	Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 29
Tire	Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50 // Bontrager SE6 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50
Tire Part	Bontrager TLR sealant, 6oz // Quarq TyreWiz tire pressure monitors
Rim Strip	Bontrager TLR
Skewer Rear	Bontrager Switch thru axle, removable lever
Shifter	Shimano XTR M9100, 12 speed
Rear Derailleur	Shimano XTR M9100, Shadow Plus, long cage, 51T max cog
Crank	E*thirteen E*spec Race carbon, 34T, 165mm length
Cassette	Shimano XTR M9101, 10-51, 12 speed
Chain	Shimano Dura-Ace/XTR M9100, 12 speed
Chainring	E*thirteen, 34T, alloy
Brake	Shimano XTR M9120 4-piston hydraulic disc // Shimano XTR M9120 4-piston hydraulic disc
Brake Rotor	Shimano RT86, 6-bolt, 203mm
Pedal	VP-536 nylon platform
Saddle	Bontrager Arvada, austenite rails, 138mm width
Seatpost	Bontrager Line Elite Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 440mm length
Seat Collar	Bolt-on, 36.4mm
Handlebar	Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
Stem	Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 45mm length
Headset	Knock Block Integrated, cartridge bearing, 1-1/8 top, 1.8 bottom
Grips	Bontrager XR Trail Elite, nylon lock-on
Battery	Bosch PowerTube 750Wh, smart system
Motor	Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm
Charger	Bosch standard 4A, 230V, smart system

Geometry Chart