Orbea's Denna is available in seven carbon builds (Shimano EP801 RS motor) and three aluminum (EP600 RS motor).
Testers praise the responsive, smooth pedal assist from the Shimano EP motor.
Climbing steep ascents in Boost mode is effortless, according to testers.
Reviewers enjoy the nimble handling and precise steering, saying the Denna corners well.
Testers relish descending aboard the “secure” ride that tracks and handles confidently over bumps.
Reviewers say the Denna feels like a regular bike when pedaling without assistance over flatter terrain.
On Shimano Di2-equipped models, PAS is controlled with the left shifter.
All power output settings can be customized through Shimano’s E-TUBE app.
The Denna is available in six sizes to cover a stated height range from 5’1” to 6’9”.
The Denna has a generous 50mm of tire clearance.
Testers find that the 45mm Vittoria Terreno Dry G2.0 tires work well for dry, dusty hardpack and light gravel.
Reviewers say the long seatpost and wide tires make for a comfortable ride.
Shimano Di2 builds have a Free Shift function to shift while coasting, and Auto Shift mode that changes gears based on cadence, torque, and speed.
The frame includes mounts for fenders, water bottles, a bag underneath the top tube, and a rear rack (adapter must be purchased separately).

6 reasons not to buy

Battery charge and chosen PAS level each have only a single LED to indicate status. Competing bikes have more sophisticated minimalist displays.
Reviewers find the centrally mounted PAS controls hard to use while traversing gravel terrain.
A reviewer says the rear wheel can spin out on gravel in Boost mode (max assist).
One test bike has rattling wires inside the frame.
The Denna isn't compatible with a dropper seatpost.
A tester complains that the motor is loud.

Bottom line

Denna is the Basque word for "everything," precisely what Orbea says its first gravel e-bike can do. The geometry leans more toward a gravel racer than an all-out adventurer, but testers find it comfortable nonetheless. In testing, the riding range and smooth, responsive assistance impress, providing ample power for steep hills and plenty of scope to tune power output. The Denna's controlled yet agile handling lends itself to rough gravel and fast descents, but the tires are only suitable for dry conditions. Overall, the Denna, especially the Shimano Di2 builds, comes highly recommended for gravel riders wanting an extra boost.

Expert Reviews

88/100 based on 2 scored reviews (4 reviews in total)

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off-road.cc

Level 5 expert

An Incredibly Responsive Motor System Paired With a High Performance Gravel Bike

Level 5 expert

… this is one of the best all-around, capable gravel bikes that I have ridden. The motor system is excellent, both in the way it responds, delivers the power, and it covers an impressive range too.

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Rennrad News

Level 5 expert

Orbea Denna E-Gravel Bike – First Test [German]

Level 5 expert

This is complemented by the excellent handling characteristics on gravel – not too sluggish, but sure-footed. And the comfort is also good. Anyone looking for a sporty e-gravel bike with plenty of power reserves should like the Orbea Denna.

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Lake District Cyclist

Level 1 expert

Orbea Denna Battery Range Test | Real-World E-Bike Performance in the Lake District!

Level 1 expert

This is such a natural ride when it’s in this Gravel [ride] mode. It doesn’t even feel like you’re really on an e-bike to be honest.

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Vojo Magazine

Level 3 expert

New Product Test | Orbea Denna: Opening up the Field of Possibilities [French]

Level 3 expert

[The Orbea Denna is] an ideal model for beginners who want to quickly experience the joys of gravel riding, but also for those with less fitness who want to see as much of the landscape as possible.

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