Rail 9.9 | Trek Bikes

Overview

You’re looking for a long-travel carbon e-MTB and you want nothing but the best. Your bike better have wireless electronic components, a high-end suspension setup, and a powerful Bosch system that’ll fly up grinders in a flash.

An OCLV Mountain Carbon frame that fully encases a 625Wh battery, a super responsive RockShox ZEB Ultimate fork with extra-burly 38mm stanchions and loads of adjustability, a RockShox Super Deluxe Ultimate shock with an updated Thru Shaft damper, a Bosch Performance Line CX 250W motor that assists up to 20 mph, and a Kiox controller. A SRAM X01 Eagle drivetrain with an extra-low 52-tooth climbing gear, downhill-rated 4-piston brakes for unflinching descents, a Bontrager Line Elite Dropper dropper post, and new Bontrager Line Pro 30 carbon wheels with robust SE5 Team Issue tires that come completely tubeless ready, including sealant.

Rail 9.9 is all about top-shelf tech. It has the latest wireless electronic components, RockShox's best enduro fork, and Bosch's most powerful battery and full-color controller.

Made with the same exclusive frame tech as Remedy and Slash, like Mino Link adjustable geometry, a Straight Shot down tube for extra stiffness, and Active Braking Pivot (ABP)
The full-color Bosch Kiox display is mounted on the top tube so you can see ride data like support level, speed, battery life, and more
The full-color Bosch Kiox display is mounted on the top tube so you can see ride data like support level, speed, battery life, and more
RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
Trek's 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
Smaller frames (S) have a top tube that dips down as it approaches the seat tube

It was a close competition, but not much could match the Rail on every type of terrain. The Bosch system will get you up any trail and the geometry is as close to perfect as we have found for all-around riding.

"Rail dominates the descents and flattens the climbs…it’s every bit as potent as the Slash, but with its own built-in uplift."

"Whether flowing or technical, it literally glides by the competition like it's on rails while also offering plenty of comfort for long days in the saddle."

"One of the best all-rounders in the test. This tuxedo-looking bike symbolizes class and intention with a big win on battery life."

2022

Rail 9.9 XX1 AXS

$13,799.99

2022

Rail 9.9 XTR

$12,549.99

2022

Rail 9.8 GX AXS

$10,299.99

2022

Rail 9.8 XT

$9,199.99

2022

Rail 9.8 GX

$9,199.99

2022

Rail 9.7

$7,549.99

2022

Rail 7

$6,649.99

2022

Rail 5

$5,649.99

2021

Rail 9.8 XT

$9,049.99

2021

Rail 9.8

$9,049.99

With just one week to road trip through British Columbia, two Trek big mountain riders decided to think outside the box.

Watch the video

Bontrager Rapid Pack

$64.99

Bontrager TLR Tire Sealant

$4.99 - $29.99

Bontrager Comp Multi-Tool

$14.99

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Bontrager Evoke Mountain Bike Short

$79.99 | $104.99

Bontrager Ion Pro RT Front Bike Light

$139.99

Bontrager Comp MTB Pedal Set

$93.99 - $114.99

SALE

Bontrager Evoke Women's Mountain Bike Short

$79.99 | $104.99

NEW

100% S2 HiPER Lens Sunglasses

$185.00

SALE

Bontrager Cambion Mountain Bike Shoe

$159.99 - $224.99 | $224.99 - $234.99

100% Surpass Elbow Guards

$129.00

100% Surpass Knee Guards

$139.00

100% Trajecta Enduro Bike Helmet

$250.00

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Features

The all-new Bosch Performance Line CX motor is lighter, smaller, and quieter than previous versions, for cleaner integration and more nimble handling. It's also more efficient so you can go farther on a single battery charge. Use the intelligent eMTB mode to automatically adjust the amount of assist to match the terrain. It's a set-and-forget mode that delivers just the right amount of power so you can focus on enjoying the ride.

Trek eMTBs feature a custom eMTB Lite mode in place of Tour mode. It gives you more natural-feeling power delivery and longer battery life.

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.

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Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.

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Trek's mountain-specific carbon fiber is tougher carbon, with unique materials and layup procedures, Trek's advanced engineering, and a higher standard of testing.

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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.

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This suspension calculator will help you optimize your suspension settings for your riding weight. Simply follow the steps to find your best set up.

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Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. You're ready to roll right out of the box with the included TLR rim strips, valves, and sealant.

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Knock Block has your frame's back when things go wrong. It prevents your handlebars from spinning all the way around in a crash, so your hoses won't get yanked, and your controls won't hit the top tube.

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Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Program. In the unlikely event that you damage your Bontrager carbon wheels within the first two years of ownership, we’ll repair or replace them for free.

Fine tune head tube angle by 1/2° and BB height by up to 10mm with the simple turn of a nut. Just flip the link to choose between slack or slacker geometry, without negatively affecting suspension performance. A Trek exclusive.

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You've got one less detail to sweat with the integrated speed sensor. The chainstay-mounted sensor stays protected while the custom hub-mounted magnet stays secure—no more error codes from mis-aligned sensors.

Bosch Kiox's bright, full-color screen is easy to read in any light conditions and is protected by durable Gorilla Glass. You can view battery life, support level, speed, heart rate, and more. Plus, it seamlessly connects to your phone through the Bosch eBikeConnect app to share ride data, GPS map routes, altitude, cadence, and power output.

Specs

*Please note - spec applies to all sizes unless listed separately

Frame	OCLV Mountain Carbon main frame, Removable Integrated Battery (RIB), tapered head tube, Knock Block, Control Freak internal routing, magnesium rocker link, Motor Armor, Mino Link, ABP, Boost148, 12mm thru axle, 150mm travel
Fork	RockShox ZEB Ultimate, 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 Ultimate RT3, DebonAir spring, Thru Shaft 3-position damper, 230mm x 57.5mm
Max compatible fork travel	170mm (580mm axle-to-crown)

Wheel front	Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Wheel rear	Bontrager Line Elite 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle
Hub front	Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle
Hub rear	Bontrager alloy, sealed bearing, 6-bolt, 108T Rapid Drive, SRAM XD driver, Boost148, 12mm thru axle
Skewer rear	Bontrager Switch thru axle, removable lever
Rim	Bontrager Line Elite 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
Tire	Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29x2.60''
Tire part	Quarq TyreWiz tire pressure monitors
Rim strip	Bontrager TLR
Max tire size	Frame: 29x2.60" Fork: See manufacturer

Shifter	SRAM X01 Eagle, 12 speed
Rear derailleur	SRAM X01 Eagle
Crank arm	Ethirteen Espec Race carbon, 34T, 165mm length
*Cassette	Size: S, M, L, XL SRAM Eagle XG-1275, 10-52, 12 speed
*Cassette	Size: S, M, L, XL SRAM XG-1295 Eagle, 10-52, 12 speed
Chain	SRAM XX1 Eagle, 12 speed
Pedal	VP-536 nylon platform
Max chainring size	34T

Saddle	Bontrager Arvada, austenite rails, 138mm width
*Seatpost	Size: S Bontrager Line Elite Dropper, 100mm travel, internal routing, 31.6mm, 340mm length
	Size: M Bontrager Line Elite Dropper, 150mm travel, internal routing, 31.6mm, 440mm length
	Size: L, XL Bontrager Line Elite Dropper, 170mm travel, internal routing, 31.6mm, 480mm length
Handlebar	Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
*Grips	Size: S, M, L, XL Bontrager XR Trail Elite, nylon lock-on
*Grips	Size: S, M, L, XL Bontrager XR Trail Elite, alloy lock-on
Stem	Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length
Headset	Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom
Brake	SRAM Code RSC 4-piston hydraulic disc
*Brake rotor	Size: S, M, L, XL SRAM CenterLine, 6-bolt, round-edge, 180mm
*Brake rotor	Size: S, M, L, XL SRAM CenterLine, 6-bolt, round edge, 200mm

Battery	Bosch PowerTube 625
Charger	Bosch standard 4A (100-240V) charger
Controller	Bosch Kiox with Anti-theft solution
Motor	Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist

Weight	M - 22.42 kg / 49.43 lbs (with tubes)
Weight limit	This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Prices shown are manufacturer's suggested retail prices.

Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.

Sizing

Geometry

All measurements provided in cm unless otherwise noted.

Sizing table
Frame size number	Frame size letter	Geometry position	Wheel size	A — Seat tube	Effective seat tube angle	C — Head tube length	D — Head angle	E — Effective top tube	F — Bottom bracket height	G — Bottom bracket drop	H — Chainstay length	I — Offset	J — Trail	K — Wheelbase	L — Standover	M — Frame reach	N — Frame stack
15.5	S	High	29"	41	75.0°	10.5	64.9°	58.7	34.4	2.9	44.7	4.3	12.7	119.5	75.8	42.5	62.3
15.5	S	Low	29"	41	75.0°	10.5	64.5°	58.8	33.9	3.5	44.8	4.3	13.1	119.6	75.3	42.0	62.6
17.5	M	High	29"	42	75.0°	10.5	64.9°	61.1	34.4	2.9	44.7	4.3	12.7	122.0	77.0	45.0	62.2
17.5	M	Low	29"	42	75.0°	10.5	64.5°	61.3	33.9	3.5	44.8	4.3	13.1	122.1	76.5	44.5	62.6
19.5	L	High	29"	45	75.0°	11.0	64.9°	63.3	34.4	2.9	44.7	4.3	12.7	124.3	76.7	47.0	62.7
19.5	L	Low	29"	45	75.0°	11.0	64.5°	63.4	33.9	3.5	44.8	4.3	13.1	124.3	76.2	46.5	63.0
21.5	XL	High	29"	50	75.0°	12.0	64.9°	66.5	34.4	2.9	44.7	4.3	12.7	127.7	76.5	49.9	63.6
21.5	XL	Low	29"	50	75.0°	12.0	64.5°	66.6	33.9	3.5	44.8	4.3	13.1	127.7	76.0	49.5	63.9

Service

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Electra brand

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favorite_borderWhy you'll love it

Best in Class winner!

"Our e-bike of the Year"

"Sets the bar"

"E-MTB dominance"

More options

Rail 9.9 XX1 AXS

Rail 9.9 XTR

Rail 9.8 GX AXS

Rail 9.8 XT

Rail 9.8 GX

Rail 9.7

Rail 7

Rail 5

Rail 9.8 XT

Rail 9.8

Minimum days, maximum fun

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Suspension Calculator

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Complete Tubeless System

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Knock Block

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Carbon Care Wheel Loyalty Program

Mino Link adjustable geometry

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Integrated speed sensor

Bosch Kiox display