The Orbea Denna marks the brand's first dedicated electric gravel platform, shifting away from the road-oriented roots of its predecessor, the Gain. Built around a mid-drive Shimano motor and a 420Wh internal battery, the Denna is designed for riders who want to push further into rugged terrain without losing the athletic feel of a traditional drop-bar bike. Orbea utilizes its OMR carbon layup and a heavily tapered top tube to introduce controlled vertical flex, prioritizing long-distance comfort over raw racing stiffness. With clearance for 50mm tires and a frame tuned to absorb trail chatter, it skips heavy mechanical suspension in favor of structural compliance. The result is a dirt-focused adventure machine that delivers subtle, natural assistance on steep climbs while maintaining enough structural rigidity to handle loaded bikepacking trips or fast, sweeping fire roads.
Where to get it.
1 retailer · size S.
Spec sheet.
Every component shipped with this build.
Geometry & fit.
6 sizes published.
The Denna utilizes a gravel-specific geometry designed to balance high-speed stability with responsive steering. Orbea pairs a relatively long top tube with a shorter stem, pushing the front wheel further out to keep the steering predictable on loose descents. A low bottom bracket and a long wheelbase further anchor the rider, creating a secure, centered posture when navigating steep or rutted tracks.
Despite the long front center, the rear end features remarkably short 425mm chainstays. This tight rear triangle helps maintain traction on loose climbs and keeps the handling sharp enough to navigate winding singletrack. Fit-wise, the Denna leans toward a sporty, athletic posture rather than a fully upright touring position. The stack-to-reach ratio is relatively low for an e-bike, encouraging a slightly aggressive stance that suits fast-paced riding. To accommodate different body types and preferences, Orbea offers six frame sizes and allows buyers to customize cockpit dimensions, including stem rise and handlebar width, prior to purchase.
Where the handlebar sits relative to the bottom bracket — the single most important fit pair.
01Fit geometry6 values
02Component geometry6 values
03Handling geometry8 values
Which size should I buy?
Slide your height to see the recommended size. GearWise's fit algorithm works from the published stack, reach, and ETT — the brand's own recommendation may differ.
→Calculated from GearWise's own stack / reach / ETT algorithm — the brand's size chart may recommend a different size, and a proper bike fit beats any calculator.
The lineup.
10 builds, ranging $3,799 – $9,999.
The Denna lineup spans a wide price range, split between carbon M-series models and alloy H-series variants. All builds share the same 420Wh internal battery, but the motor hardware shifts depending on the tier. Entry-level models utilize the slightly heavier Shimano EP600 drive unit paired with mechanical Shimano Cues or GRX shifting. Moving up the ladder introduces the lighter EP801 motor and electronic drivetrains from SRAM or Shimano.
A major functional difference emerges on the Shimano Di2 builds. By mixing road shifters with a mountain bike rear derailleur, these models allow riders to toggle the motor's assistance modes directly from the left shifter. This integration removes the need to move a hand to a separate remote on rough terrain, a feature frequently highlighted as a significant value add.
Rolling stock also upgrades as prices increase, moving from standard alloy wheels to Oquo carbon wheelsets with a gravel-appropriate 25mm internal width. While the flagship Dura-Ace and SRAM Red builds command premium pricing, the mid-tier electronic models offer the most compelling balance of motor integration, wide-range gearing, and overall weight.
From the press.
13 reviews from the cycling press.
Reviewers consistently praise the Denna for its seamless motor integration and balanced handling on rough terrain. Rather than delivering a sudden surge of power, the custom-tuned Shimano system provides a "natural push that accompanies each pedal stroke like an invisible teammate" (3bikes). Testers found that this subtle delivery, combined with the low center of gravity from the mid-drive motor, effectively masks the bike's weight at lower speeds. On technical trails, the chassis remains surprisingly agile, with one rider noting it feels "nimble and flickable" (Road.cc) despite the battery and motor.
When pointed downhill on loose surfaces, the bike earns high marks for stability. The frame's engineered flex and high-volume tires absorb chatter well, giving riders "total control" (3bikes) on unpredictable descents. However, reviewers noted a few distinct tradeoffs. Once the motor cuts out above the assistance limit, the friction of the mid-drive system and the overall weight become noticeable on flat tarmac. Additionally, the motor requires a wider stance than a standard gravel bike, which alters pedaling ergonomics slightly. Despite these compromises, the consensus points to a highly capable machine that excels at smoothing out harsh, rocky routes.
Orbea Denna M20I e-gravel bike review - Cycling News | off-road.cc
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