Trek E-caliber 9.9 Xtr Gen 2 Mountain Bike
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.
Removable drivepack
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.
IsoStrut
E-Caliber has the same innovative IsoStrut rear suspension as World Cup-winning Supercaliber. You get 60mm of integrated rear travel—just the right amount of comfort and traction, without the weight or flex of traditional full suspension.
OCLV Mountain Carbon
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.
| 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 |
| Shock | 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, 29×2.40” |
| Max tire size | Frame: 29×2.40″, Fork: See manufacturer |
| 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, 32T, 175mm length |
| Crank arm | E*thirteen E*spec Race Carbon, 32T, 170mm length |
| Cassette | Shimano XTR M9101, 10-51, 12 speed |
| Chain | Shimano Dura-Ace/XTR M9100, 12 speed |
| Max chainring size | 1x: 32T |
| Saddle | Bontrager 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 |
| Grips | ESI Chunky |
| *Stem | Size: S , M Bontrager Kovee Pro, 35mm, Knock Block, Blendr compatible, 13 degree, 60mm length |
| Size: 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 |
| *Brake rotor | Size: S , M , L , XL Shimano MT900, 203mm, centerlock |
| Size: 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). |
| Size | Rider Height | Inseam |
|---|---|---|
| S |
153 – 167 cm 5’0″ – 5’6″ |
72 – 79 cm 28″ – 31″ |
| M |
161 – 175 cm 5’3″ – 5’9″ |
76 – 82 cm 30″ – 32″ |
| L |
174 – 188 cm 5’9″ – 6’2″ |
82 – 88 cm 32″ – 35″ |
| XL |
186 – 196 cm 6’1″ – 6’5″ |
87 – 92 cm 34″ – 36″ |




