For our group test, Trek put stock in an ebike with a mid-motor drive and trust that the Domane+ LT 9 will be the best road bike of the 2021 season. With the additional power of the FAZUA Ride 50 Evation system, how does it compare to 14 of the most exciting bikes of the 2021 season? Find out here.

For an overview of the test fleet head to the group test: The best road bike of 2021 – 15 models in review

Trek Domane+ LT 9 | FAZUA Evation Drivepack/250 Wh | 13.42 kg in size 56 | € 10,999 | Manufacturer’s website

The Trek Domane+ LT 9 draws looks inexorably. To begin with, that’s because of the Gloss Purple Flip finish #colorporn! Once you’re done ogling the paint job, you’ll notice the hefty appearance and it becomes clear that this is an ebike. Trek rely on FAZUA’s Ride 50 Evation system consisting of a gearbox fixed in the bottom bracket and Drivepack. The gearbox incorporates a torque sensor and cadence measurement, letting the system know how much power the rider is producing so that it can deliver appropriate motor support depending on the assistance mode. The Drivepack unit is partly integrated into the down tube, can be completely removed and contains a 250 W, 55 Nm motor together with a 252 Wh battery that can be swapped out. You can switch the system on and select between the three assistance modes, Breeze, River and Rocket via the Bluetooth remote on the top tube. While Breeze will support you with a constant 100 W regardless of your own input, the progressive River mode modulates its output in sync with your power up to a maximum support of 210 W. Rocket then, once again, supports you independently of your input, this time with 250 W. Different modes for different uses. Do you have heavy legs and need a little support? Choose Breeze. Do you want to work hard but be quicker than usual? River is your thing! Shuttle service needed? It’s Rocket time! All this applies to the factory settings but the modes can also be adjusted individually, for example with Rocket providing short-duration peaks of 400 W support. A Shimano DURA-ACE Di2 groupset with 50/34 t chainrings and 11–30 t cassette eschews the standard cranks in favour of the FSA SL-K Light cranks that were developed especially for the FAZUA unit.

Comfort comes at a cost
At the rear, the Trek Domane+ LT 9 incorporates the IsoSpeed system that is featured on its non-motorised siblings. Thanks to the IsoSpeed decoupler, the seat tube can flex independently of the top tube, meaning it can “swing away” vibrations and bumps from the ground. It works! #flyingcarpet. Unfortunately, as a result, the range of adjustment of the seat mast cap is very limited.
Weight loss programme
The Drivepack, consisting of the motor and battery, has to be removed for charging. That’s done very easily, allowing you to quickly install a full battery or put a cover over the resulting cavity to be able to ride a 10.12 kg bike without an E-drive, trunk included.
Show me your numbers
The Domane+ LT 9 doesn’t hide that it’s an ebike. The plate on the chainstay proudly displays the performance data of the system. Concentrated E-power!

Trek Domane+ LT 9 2021

€ 10,999


Motor FAZUA Evation Drivepack 60 Nm
Battery FAZUA Evation 1.0 250 Wh
Seatpost Trek 20 mm
Brakes Shimano DURA-ACE BR-R9170 160/160 mm
Drivetrain Shimano DURA-ACE Di2 R9150 2 x 11
Chainring 50/34
Stem Bontrager XXX Blendr 100 mm
Handlebar Bontrager IsoCore Pro VR-CF 420 mm
Wheelset Bontrager Aeolus PRO 3V 12 x 100/12 x 148 mm Thru-Axle
Tires Bontrager R3 32-622 (700x32C) 34
Cranks FSA SL-K Light 172,5 mm
Cassette Shimano DURA-ACE CS-R9100 11–30

Technical Data

Size 50 52 54 56 58 60 62
Weight 13.42 kg

Specific Features

IsoSpeed suspension system
raised seatpost clamp

Magic button
The remote of the FAZUA Ride 50 Evation system is integrated into the top tube and awakens the motor via Bluetooth. It also lets you select between the three assistance modes.
The cables of the Trek Domane+ LT 9 run a path from the bars into the headset top cap that is clearly visible. We would have liked to see a little more integration here.
Clever bottom bracket
The bottom bracket of the Trek Domane+ LT 9 hides the FAZUA Ride 50 Evation gearbox. It measures cadence and the rider’s power with a torque sensor – that means the software can always deliver the right amount of motor power. Unfortunately, the gearbox increases the Q-factor compared to traditional road bikes.

The gear range is sufficient for flat sections and hilly tours, but on longer hills without or with limited motor assistance, a 34 t cog at the back wouldn’t hurt. Instead of DURA-ACE rotors, the Domane+ LT 9 comes with 160 mm XTR mountain bike rotors. The cockpit consists of the 100 mm long Bontrager XXX Blendr carbon stem and the 420 mm wide Bontrager Pro IsoCore VR-CF bars. The latter damp vibrations and small bumps effectively thanks to a special carbon layup and, thankfully, let you forget the lack of IsoSpeed system at the front of this Trek. The bike rolls on 700 x 32C Bontrager R3 tires, mounted tubeless on the Bontrager Aeolus Pro 3V TLR wheels, which balloon to 34 mm wide thanks to the impressive 25 mm inner width of the rim – a very well matched wheel and tire combination for this group test and bike concept! The Trek Domane+ LT 9 frame is furnished with mounting points for mudguards and is ready to be fitted with an integrated light system. The Trek Domane+ LT 9 costs € 10,999.

Size 50 52 54 56 58 60 62
Seat tube 450 mm 475 mm 500 mm 525 mm 548 mm 567 mm 586 mm
Top tube 519 mm 530 mm 542 mm 554 mm 567 mm 579 mm 593 mm
Head tube 130 mm 145 mm 160 mm 175 mm 195 mm 220 mm 245 mm
Head angle 71.1° 71.3° 71.3° 71.9° 72.0° 72.1° 72.1°
Seat angle 74.6° 74.2° 73.7° 73.3° 73.0° 72.8° 72.5°
Chainstays 420 mm 420 mm 420 mm 420 mm 425 mm 425 mm 425 mm
BB Drop 80 mm 80 mm 80 mm 78 mm 78 mm 75 mm 75 mm
Wheelbase 996 mm 1,003 mm 1,010 mm 1,008 mm 1,022 mm 1,032 mm 1,042 mm
Reach 368 mm 371 mm 374 mm 377 mm 380 mm 383 mm 386 mm
Stack 546 mm 561 mm 575 mm 591 mm 611 mm 632 mm 656 mm
Helmet POC Octal MIPS | Glasses 1 Glendale | Jacket Patagonia Reversible Bivy Down Vest
Jersey GRAN FONDO Shirt | Pants Rapha Men’s Cargo Bib Shorts | Shoes Dromarti Race Carbon Terra
Socks POC Essential Print Socks

The Trek Domane+ LT 9 in review

The Trek Domane+ LT 9 weighs 13.42 kg in size 56 making it the heaviest bike in the test and significantly heavier than the two other E-road bikes. It can’t hide that fact when it comes to the handling, making it the bike that requires the most significant steering input to change direction. As a result of its more imprecise and not particularly direct steering, it feels sluggish and falls behind the SCOTT and Orbea ebikes.

The Trek Domane+ LT 9 might be the heaviest ebike in the test but also offers the widest range of application amongst the E-road bikes. Charge the battery, attach lights and mudguards, and you have an all-round carefree package!

Nonetheless, it always remains good-natured. That character also fits the moderately stretched position which is well-suited to long distances and offers the best comfort of the three ebikes in the test. The adjustable IsoSpeed system on the seat tube, the wide Bontrager tires and the IsoCore bars do a whole lot of work. The IsoSpeed system decouples the seat mast from the main frame generating lots of comfort. However, the bike loses marks for the seat mast cap, which is very short due to the IsoSpeed system, limiting the range of adjustment. Riders with comparatively long legs won’t be happy here. In addition, you should also be aware that the Trek has a wider Q-factor than traditional bikes as a result of the FAZUA gearbox in the bottom bracket. The stiff frame means the bike responds directly, even above the assistance limit of the motor, though it does miss some sprightliness due to its high overall weight. As such, the Domane+ LT 9 can’t match the SCOTT Addict eRIDE Premium. By contrast, acceleration with motor support is very powerful. The FAZUA motor delivers noticeably more torque than the MAHLE Ebikemotion system, while the throttling of the motor at the 25 km/h assistance limit feels very natural. Having gotten used to the comparatively high inertia of the bike, there’s nothing to complain about regarding ride security. Even on rough ground its sits planted and with its good stability conveys the highest sense of trust of all the ebikes in the test. And this trust is maintained while braking too – there’s plenty of power on tap!

Tuning tip: mount mudguards and lights and nothing will stop you

Riding Characteristics



  1. cumbersome
  2. playful


  1. nervous
  2. confident


  1. demanding
  2. balanced

Fun factor

  1. boring
  2. lively


  1. firm
  2. comfortable

Value for money

  1. terrible
  2. very good

Technical Data

Domane+ LT 9

Size: 50 52 54 56 58 60 62
Weight: 13,42 kg
Price: € 10,999

Indended Use

Smooth tarmac 1
Allroad/Gravel 2
Everyday/Commuting 3


The Trek Domane+ LT 9 expands the definition of road bike very much in the direction of E-SUVs with drop bars but convinces with the best everyday practicality of all the E-road bikes in the test. The mudguard mounts and ready-to-use light mounts make it the ideal bike for all those looking for a powerful cruiser for paths away from asphalt but who also like to push hard on the pedals themselves now and then. What you won’t find is a low weight or a cornering demon.


  • torque sensor means motor delivers power naturally
  • good comfort thanks to IsoSpeed and tire choice
  • high stability and efficiency
  • wide range of applications thanks to the motor, mudguard mounts and integrated light


  • wider Q-factor than normal bikes
  • to activate the FAZUA system after 8 h of inactivity, the battery has to be removed and reinstalled.
  • limited range of adjustment of saddle height due to short seat mast cap

For more information head to

The test field

For an overview of the test fleet head to the group test: The best road bike of 2021 – 15 models in review

All bikes in test: BMC Roadmachine 01 ONE (Click for review) | Cannondale SuperSix EVO Hi-MOD Disc Ultegra (Click for review) | Canyon Grail CF SLX 8 eTap (Click for review) | Cervélo Caledonia-5 Dura Ace Di2 Disc (Click for review) | Mason Resolution Ekar (Click for review) | MERIDA REACTO TEAM-E CUSTOM (Click for review) | MERIDA SCULTURA ENDURANCE CUSTOM (Click for review) | OPEN MIN.D. (Click for review) | Orbea Gain M20i (Click for review) | ROSE REVEAL FOUR DISC Ultegra Di2 (Click for review) | SCOTT Addict eRIDE Premium (Click for review) | Specialized S-Works Aethos (Click for review) | Storck Fascenario.3 Comp Disc Ultegra (Click for review) | Trek Domane+ LT 9 | Wilier Filante SLR (Click for review)

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Words: Photos: Robin Schmitt