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It's right for you if...

You've seen the e-bike light and want to expand your boundaries. Like us, you believe nothing should stand between you and your next great ride, including big climbs, headwinds, rugged trails you wouldn't otherwise be able to explore.

The tech you get

A lightweight and durable Alpha Platinum Aluminum frame that fully encases a 500Wh battery for sleek looks and protection on the trail, a new Bosch Performance CX 250-watt motor that assists up to 20 mph, and an ergonomic Bosch Purion controller. A RockShox Recon RL fork with 120mm of travel and a SRAM SX Eagle 1x12 drivetrain.

The final word

The best Bosch mountain bike electric assist system available on a value-minded e-MTB built with durable, reliable parts. The drivetrain, suspension, and components deliver solid all-around performance, so you can commute to the trailhead and then spend all day riding.

The Walkthrough

favorite_borderWhy you'll love it

  1. The new, better-than-ever Bosch motor is smaller, lighter, and more efficient. It feels more natural while you’re pedaling, and has less drag when you’re not
  2. 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
  3. The Purion controller has Walk Assist and an intelligent eMTB mode that automatically delivers the right amount of power based on your terrain
  4. It's equipped with an external charging port for easy charging on or off the bike
  5. The size S frame features a curved top tube that makes standing over the bike easier. Plus, Smart Wheel Sizing means you'll get the fastest wheel that fits—29˝ wheels on larger frames, 27.5˝ wheels on smaller frames


Features

Will my bike have a curved top tube?

Will my bike have a curved top tube?

Smaller frames (S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.

New Bosch Performance Line CX

New Bosch Performance Line CX

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.

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.

Watch video

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.

Calculate your range

Specifications

*spec applies to all sizes unless otherwise noted

Frameset
Frame Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, Motor Armor, Boost148, 12mm thru axle
Fork RockShox Recon RL, Solo Air spring, Motion Control damper, e-MTB optimized, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 120mm travel
Max compatible fork travel 120mm (XS & S: 100mm)
Wheels
Hub front Bontrager sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle
Hub rear Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle
Skewer rear Bontrager Switch thru axle, removable lever
Rim Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, presta valve
*Tire Size: M
Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30''
Size: M
Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.30"
Max tire size 29x2.60" or 27.5x2.8" (XS & S: 27.5x2.60")
Drivetrain
Shifter SRAM SX Eagle single-click, 12 speed
Rear derailleur SRAM SX Eagle
Crank SRAM X1 1000, 36T, 165 mm length
Cassette SRAM PG-1210 Eagle, 11-50, 12 speed
Chain SRAM SX Eagle, 12 speed
Pedal VP-536 nylon platform
Components
Saddle Bontrager Commuter Comp
Seatpost Bontrager alloy, 31.6mm, 12mm offset, 360mm length
Handlebar Bontrager alloy, 31.8mm, 15mm rise, 750mm width
Grips Bontrager XR Endurance Comp, lock-on
Stem Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length
Headset FSA IS-2, 1-1/8'' top, 1.5'' bottom
*Brake Size: M
Tektro HD-M275 hydraulic disc, 203mm rotors
Size: M
Tektro HD-M275 hydraulic disc
Brake rotor Tektro, 203mm, 6-bolt
Accessories
Battery Bosch PowerTube 500
Charger Bosch compact 2A (100-240V) charger
Controller Bosch Purion
Motor Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 20mph or 32km/h max assist
Weight
Weight M - 23.00 kg / 50.70 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, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorized Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise stated.

Frame size number Frame size letter 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 Stem length
15.5 S 27.5" 39.4 71.5° 13 67.6° 59.8 30.7 4.9 45.5 4.2 10.1 112.5 72.1 39 62.3 5
17.5 M 29" 41.9 71.7° 13 67.7° 61.7 32.4 4.9 45.5 5.1 9.8 115.5 79.4 40.6 63.9 6
19.5 L 29" 47 71.7° 14 67.7° 64.1 32.4 5 45.5 5.1 9.8 118 81.6 42.7 64.8 7
21.5 XL 29" 52.1 71.7° 16 67.7° 67.2 32.4 5 45.5 5.1 9.8 121.2 81.8 45.2 66.7 8

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