It's right for you if...
You wanna ride your heart out on a lightweight e-MTB that rips singletrack just like a regular XC bike, but can give you a leg-saving boost when you want it. You also want the smoothest, lightest, more precise parts spec, filled with carbon and cutting edge tech like our IsoStrut shock.
The tech you get
A lightweight, full OCLV Mountain Carbon frame with 60mm of travel, a 120mm FOX Factory 34 Step-Cast fork, dual remote lockout, and Trek's exclusive lightweight IsoStrut FOX Factory shock. A new Fazua Ride Trail 50 and 250Wh battery that can assist up to 20 mph when it's on, and gives zero drag when it's off, plus a handlebar-mounted Fazua Ride Remote FX controller. A Shimano XTR drivetrain, a FOX Transfer SL dropper, and Kovee XXX 30 carbon wheels.
The final word
Our top-shelf E-Caliber is light, fast, and built to rip. It rides like an XC race bike—like a Supercaliber, in fact—until you decide you want a little boost to scramble up a climb or put in a few extra laps.
favorite_borderWhy you'll love it
- You get a helping hand from the motor on climbs and long rides, but it's a more natural-feeling assist that gives you an overall experience that's closer to riding an analog bike than a typical e-MTB
- The drive system, including the motor, is easily removable. Just take it out, pop on the included cover, and you’ll have a standard mountain bike that weighs 2.9kg less than before
- IsoStrut gives you just enough rear suspension for cross country traction and comfort with less weight and more efficiency
- Pivotless seat stays save on weight and actively bend to help soak up trail chatter
- Wider Kovee XXX 30 wheels are crazy light, really strong, and provide better tire support so you can run lower pressure and get more traction
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Fast and efficient
Fazua's lightweight drive system adds a punch of power when you need it, but rides and feels like a traditional bike when you don't. You won't feel much drag or resistance when you turn it off or pass the max level of assist. The system is also compatible with a smartphone app to let you check battery status and customize your ride.
Smart software for the trail
E-Caliber is equipped with intelligent Fazua software called BLACK PEPPER, which allows the motor to respond immediately as you start to pedal, delivers more power over a wider cadence range, and lets you customize your user settings.
Remove the motor and drivepack to save 6.4 lbs./2.9 kg on days when you don't need the boost. The included cover also turns the down tube into extra storage.
Carbon Care Wheel Loyalty Program
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.
Rapid Drive 108 rear hub
With 108 points of engagement, Rapid Drive gives you nearly instant acceleration instead of a clunky lag when you step on the pedals. You get smooth, immediate power to blast out of corners and hammer through the rough stuff. And that extra pedal ratchet adds control that can make all the difference when tackling a tricky climb.
Wider dropouts (110mm front, 148mm rear) give you the stiffness of a 27.5" wheel with all the benefits of a 29" wheel, and Boost148 in the rear lets you run wider tires and a larger chainring without affecting q-factor and pedaling efficiency.
*spec applies to all sizes unless otherwise noted
|Frame||OCLV Mountain Carbon main frame & stays, IsoStrut, tapered head tube, Knock Block, Control Freak internal routing, Boost148, 60mm travel|
|Fork||Fox Factory 34 Factory Step-Cast, Float EVOL air spring, FIT4 2-position damper, dual remote lockout, tapered steerer, 44mm offset, Kashima Coat, Boost110, 15mm Kabolt axle, 120mm travel|
Trek IsoStrut, Fox Factory shock, air spring, DPS 2-position remote damper, Kashima Coat, 235x32.5mm
M , L , XL
Trek IsoStrut, Fox Factory shock, air spring, DPS 2-position remote damper, Kashima Coat, 235mm x 32.5mm
|Max compatible fork travel||120mm (531mm axle-to-crown)|
|Wheel front||Bontrager Kovee XXX, OCLV Mountain Carbon, Tubeless Ready, centerlock, Boost110, 15mm thru axle|
|Wheel rear||Bontrager Kovee XXX, OCLV Mountain Carbon, Tubeless Ready, DT Swiss 54T engagement, centerlock, SRAM XD driver, Boost148, 12mm thru axle|
|Skewer rear||Bontrager Switch thru axle, removable lever|
|Tire||Bontrager XR3 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120tpi, 29x2.40''|
|Max tire size||Frame: 29x2.40" Fork: See manufacturer|
|Shifter||Shimano XTR M9100, 12 speed|
|Rear derailleur||Shimano XTR M9100, Shadow Plus, long cage, 51T max cog|
S , M , L
E*thirteen E*spec Race Carbon, 32T, 170mm length
E*thirteen E*spec Race Carbon, 32T, 175mm length
|Cassette||Shimano XTR M9101, 10-51, 12 speed|
|Chain||Shimano Dura-Ace/XTR M9100, 12 speed|
|Max chainring size||32T with 52mm chainline|
|Saddle||Bontrager P3 Verse Pro, carbon rails, 145mm width|
|Seatpost||Fox Transfer SL, 100mm travel, internal routing, 31.6mm|
|Handlebar||Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width|
S , M
Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree, 60mm length
L , XL
Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree, 70mm length
|Headset||Knock Block Integrated, 62-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom|
|Brake||Shimano XTR M9120 4-piston hydraulic disc|
S , M , L , XL
Shimano MT900, 203mm, centerlock
S , M , L , XL
Shimano EM910, 180mm, centerlock
|E-bike system||Fazua Ride Trail 50 motor|
|Battery||Fazua Evation battery, 250Wh|
|Charger||Fazua Evation charger, 90-120V|
|Controller||Fazua Remote bX|
|Tool||Bontrager Switch Lever, w/tool|
|Weight||M - 16.38 kg / 36.05 lbs (with TLR sealant, no tubes)|
|Weight limit||This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).|
Sizing & Tech
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local retailer.
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
161.0 - 175.0 cm
5'3.4" - 5'8.9"
76.0 - 82.0 cm
29.9" - 32.3"
174.0 - 188.0 cm
5'8.5" - 6'2.0"
82.0 - 88.0 cm
32.3" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
All measurements provided in cm unless otherwise noted.
|Frame size letter||Actual frame size||Wheel size||A — Seat tube||B — 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|