Orbea

GainM30 20mph

FrameOrbea Gain Carbon OMR mon…Gain OMR carbon fork, 700x3…

GroupsetShimano R7120Shimano 105 R7100 11-34t…

WheelsAlloy, Tubeless, 700c,…Pirelli P ZERO™ Race X Smar…

Tire clearance35 mm

The current generation of the Orbea Gain is a lightweight electric road bike designed to preserve the aesthetic and pedaling dynamics of a traditional endurance machine. Built around an OMR carbon frame and the compact Mahle X20 hub motor, the platform integrates a 353-watt-hour battery inside the down tube. This design choice prioritizes a sleek silhouette and natural pedaling resistance over the high-torque output typical of mid-drive systems.

Orbea equips the Gain with a standard 12x142 millimeter rear thru-axle, fully internal cable routing, and integrated front and rear lights powered by the main battery. With official clearance for 35-millimeter tires, the bike is primarily tuned for paved roads but accommodates high-volume rubber for light mixed-terrain detours. It suits riders looking to maintain group paces or manage fatigue on long, hilly routes without sacrificing the classic road cycling experience.

Orbea Gain

Build

Size

$4,000See deal

01 / Buy

Where to get it.

No retailers stocking size S.

Size

0 retailers · Size S

No retailers carrying size S right now.

02 / Specifications

Spec sheet.

Every component shipped with this build.

01Frameset

2 components

FrameOrbea Gain Carbon OMR monocoque structure, Integrated Seat clamp with STVZO light, ICR cable routing, Thru Axle 12x142mm rear, thread M12x2 P1, Flat Mount disc, 700x35 max tyre, BB386 EVO, Mahle X20 AMC plug.

ForkGain OMR carbon fork, 700x35 maximun tyre, Flat Mount disc, Thru Axle 12x100mm, thread M12x2 P1

02Drivetrain & brakes

11 components

Shift leversShimano R7120

Front derailleurShimano 105 R7100

Rear derailleurShimano 105 R7100

CassetteShimano 105 R7100 11-34t 12-Speed

ChainShimano M6100

CranksetShimano 105 R7100 34x50t; Crank Length: XS/S: 170mm, M/L/XL: 172mm, XXL: 175mm

Bottom bracketBB386 EVO

Front brakeShimano R7170 Hydraulic Disc

Rear brakeShimano R7170 Hydraulic Disc

Front rotornull

Rear rotornull

03Wheels & tires

4 components

Front wheelAlloy, Tubeless, 700c, 21c

Rear wheelAlloy, Tubeless, 700c, 21c

Front tirePirelli P ZERO™ Race X SmartEVO TLR 700x30c

Rear tirePirelli P ZERO™ Race X SmartEVO TLR 700x30c

04Cockpit & contact

5 components

StemOC Road Performance RP10, -8º; Length: XS: 70mm, S: 80mm, M/L: 90mm, XL: 100mm, XXL: 110mm

HandlebarsOC Road Performance RP21 Alu SL, Reach 80, Drop 125; Width: XS: 380mm, S/M: 400mm, L/XL/XXL: 420mm

SaddleFizik Aliante R5

SeatpostOC Performance XP10-S Carbon, 27.2mm, Setback 20

Grips/TapeOrbea Anti-Slippery/Shock Proof

03 / Geometry

Geometry & fit.

6 sizes published.

The Gain borrows its foundational shape from Orbea’s Orca road line but applies specific adjustments to suit endurance riding. To accommodate the motor system and prioritize stability, the wheelbase is extended and the bottom bracket is slightly lowered. This creates a highly composed platform that tracks predictably on fast descents and rough pavement, trading the immediate, twitchy steering of a pure race bike for steady, reliable handling.

Rider posture is noticeably relaxed. Across the six-size range, the frame features a taller stack and slightly shorter reach than its racing siblings, promoting a more upright position that reduces lower back and neck fatigue during long days in the saddle. This endurance-focused fit is further emphasized by the inclusion of a 15-millimeter riser handlebar on most builds. The riser bar not only elevates the cockpit but also aids in damping road vibration before it reaches the rider's hands, complementing the compliance of the carbon fork and high-volume tires.

Reach × Stack · size Smm

Where the handlebar sits relative to the bottom bracket — the single most important fit pair.

01Fit geometry6 values

Stack547 mm

Reach378 mm

Top tube535 mm

Headtube length136 mm

Standover height756 mm

Seat tube length460 mm

02Component geometry6 values

Crank length170 mm

Handlebar width400 mm

Stem length80 mm

Seatpost offset20 mm

Handlebar reach80 mm

Handlebar drop125 mm

03Handling geometry8 values

Headtube angle71.2°

Seat tube angle74°

BB height263 mm

BB drop78 mm

Trail63.3 mm

Offset50 mm

Wheelbase998 mm

Chainstay length415 mm

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.

Your height

5'8"173 cm

5'0"5'5"5'10"6'3"6'7"

Recommended sizeSBased on stack, reach & ETT for your height · score 51/100.

→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.

04 / Other builds

The lineup.

5 builds, ranging $5,299 – $9,999.

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.

—M10i 20mph

Shimano Dura-Ace Di2 2x12

$9,999

—M20i 20mph

Shimano Ultegra Di2 2x12

— · Currently viewingM30 20mph

Shimano 105 2x12

$5,599On this page

—M40 20mph

Shimano Cues 2x10

$5,299

05 / Reviews

From the press.

13 reviews from the cycling press.

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.