Gain

The Gain carbon lineup spans five models, all sharing the same OMR frameset, Mahle X20 motor, and internal 353-watt-hour battery. The primary differences across the range lie in the drivetrain technology and wheel materials.

At the top end, the M10i features a premium Shimano Dura-Ace Di2 electronic groupset and 42-millimeter deep carbon wheels. However, reviewers frequently point to the M20i as the smartest value. It utilizes Shimano Ultegra Di2 and retains the exact same carbon wheelset as the flagship model, delivering nearly identical shifting performance for substantially less money. The M30i steps down to Shimano 105 Di2 and swaps the carbon hoops for tubeless-ready alloy wheels, offering a more accessible entry point for riders who still want electronic shifting.

For those who prefer mechanical drivetrains, the M30 relies on a standard 12-speed Shimano 105 group. The entry-level M40 utilizes Shimano's 10-speed Cues components. All builds feature hydraulic disc brakes, 30-millimeter Pirelli tires, and the integrated lighting system. Orbea also includes wired handlebar remotes for the motor across the electronic builds, allowing riders to toggle assistance levels without moving their hands from the tops.

Critics consistently praise the Gain for delivering an exceptionally realistic cycling experience. The Mahle X20 motor is tuned to mirror rider input linearly, creating a "natural ride feel" (BikeRadar) rather than surging unpredictably. Testers frequently noted that the assistance simply makes the rider feel as though they have "good legs" (Edinburghbikeshop) on sustained climbs. Furthermore, the motor's power tapers off smoothly as the bike approaches its legal speed limit, avoiding the jarring cutoff common to older e-bike systems.

However, the transition to unassisted pedaling reveals the bike's mass. While light for an e-bike at roughly 11.5 kilograms, reviewers observed that the Gain can feel "bloated" (T3) on rolling terrain once the motor disengages, requiring extra effort to maintain momentum over short inclines. High-speed descending is a strong point, with the low center of gravity keeping the chassis composed through fast corners.

The primary criticism centers on the digital ecosystem. While the mechanical and electrical hardware performs reliably, some testers found the companion software frustrating, with one reviewer calling the Mahle app "effectively unusable" (Cyclingelectric) due to connectivity issues. A few riders also questioned the durability of the plastic head unit mount, though the integrated top-tube controller and handlebar remotes received high marks for usability.