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For more than a decade, the Merida REACTO has occupied a distinct spot among aero road bikes. Launched in 2011 – when aero profiles were still relatively niche in the peloton – it has steadily become a pillar of the Taiwanese brand’s road line-up.
With this fifth generation, Merida says it has reworked its speed-centric platform from the ground up. The brief is unchanged: deliver a fast bike that still offers comfort and control suited to real-world use, not just strong wind-tunnel numbers.
🚀 In brief:
Development launched in May 2022, with CFD simulations, wind-tunnel tests and race validation (2025 Tour de France, Vuelta).
Stated aero target: drop below 200 W at 45 km/h in Tour magazine’s benchmark test, while aiming for a weight close to 6.8 kg (UCI limit).
New TEAM CW 1P cockpit (around 320 g) with a “seagull-wing” shape, credited with roughly half of the aerodynamic gain versus the previous one.
Development of the new REACTO began in May 2022 and has taken close to four years. Over that time, Merida’s engineers ran extensive simulations and testing to optimise every area of the bike.
The process notably relied on:
Early versions were also evaluated at WorldTour races, notably at the 2025 Tour de France and the Vuelta, to refine certain technical choices, particularly around the carbon layup and dynamic behaviour.
For this new generation, Merida set several specific objectives.
The first was aerodynamics. The new REACTO had to get under the 200-watt mark in Tour magazine’s benchmark test, which measures the power required to maintain a speed of 45 km/h.
The brand also wanted to:
The idea is therefore to maintain a balance between outright speed, stiffness and usability, rather than chasing aerodynamic gains alone.
Visually, the REACTO V keeps the defining lines that built its identity, while adopting a more assertive look.
The frame now plays more with the contrast between broader surfaces and slimmer sections, notably at the down tube and head tube. The idea is to preserve aero efficiency while enabling more targeted work on stiffness and weight.
Merida is also introducing several recurring stylistic elements, such as a “V” motif present at various points on the frame (fork, seatstay junction, cockpit). The goal is to make the bike immediately identifiable within the range.
As is often the case on modern aero bikes, the gains do not come solely from tube shapes. Merida says it focused its efforts on several critical zones.
The new TEAM CW 1P cockpit plays a central role in the aerodynamic improvement.
Weighing around 320 g, it adopts a “seagull-wing” shape intended to limit airflow separation. According to the brand, this change accounts for nearly half of the overall aerodynamic gain compared with the previous cockpit.
The cockpit is also slightly narrower to enable a more compact, more aerodynamic position.
The fork receives thinner, deeper blades to limit drag at the tyre interface.
The head tube has been optimised to improve cockpit integration and allow the use of 1.5-inch upper and lower headset bearings, which increases front-end stiffness.
The new seatpost drops the 15 mm setback in favour of a zero-offset version, lighter and slimmer.
This change saves around 100 g while retaining some horizontal flex to improve comfort on rough surfaces.
Another notable change: tyre clearance is now 32 mm.
Even though Merida indicates it favours a setup around 30 mm, this extra clearance aims to improve airflow around the wheels while offering a bit more versatility on rougher roads.
To support this change, the chainstays were slightly lengthened, from 408 mm to 410 mm, with no stated impact on handling.
The new REACTO is offered in several high-end configurations, each with a slightly different brief.
The most aerodynamically focused build.
The most versatile build.
The lightest build in the range.
The REACTO is offered with two frame constructions:
Both share the same geometry and the same aerodynamic performance. The difference mainly comes down to the carbon layup and the spec.
The REACTO is no newcomer to the aero bike category, and here Merida evolves a platform already well established in the professional peloton.
The approach is consistent: rather than chasing only spectacular wind-tunnel gains, the brand stresses the balance between aerodynamics, weight and on-road behaviour. It mirrors how modern road bikes are trending, with “aero” platforms becoming increasingly versatile.
Boosting tyre clearance to 32 mm points in that direction, as does the intent to preserve a certain level of comfort. The question is whether, on the road, this new generation genuinely sharpens the REACTO’s already well-regarded balance.
| Riding style | Road bike |
|---|---|
| Frame | Carbon |
| Electric assist | No |
| Gender | Unisex |
| Year | 2026 |
| Model | Merida REACTO 10K, Merida REACTO 400, Merida REACTO 9000 |
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