Denna M40 28mph

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.

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.