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2021 Merida

REACTO 4000

A carbon frame aero bike with upper mid-range components and shimano 105 hydraulic disc brakes.
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Manufacturer Price

£2,250($4,166)
Weight8.5 kg  
FrameCarbon
ForkCarbon
Wheels700c Aluminum
Drivetrain2 × 11
Groupset105
BrakesShimano 105 Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
REACTO 4000
Other Aero bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

66 km/h

REACTO 4000

64 km/h

Similar Bikes

Highest gear

(descending)

Reviews

Summary

The Merida Reacto is a highly regarded aero road bike that combines improved aerodynamics with increased comfort and versatility. It features a fully integrated cockpit, revised fork profiling, and an S-Flex seatpost for enhanced ride quality. While it excels in speed and handling, some reviews note its stiffness and the need for wheel upgrades to fully realize its potential.

Pros
  • Improved aerodynamics

  • Increased tyre clearance

  • More compliance

  • Fully integrated cabling

  • S-Flex seatpost for comfort

Cons
  • Can feel excessively rigid

  • Wheelset is a weak point

  • Front end susceptible to crosswinds

Key Quotes
Merida’s Reacto aero road bike enters its fourth generation with an all-new carbon frame that through subtle updates is more versatile than ever while still improving on aerodynamics.
Bikerumor logoBikerumor
The new Reacto makes the race choice easier, there’s no longer a need to pick comfort over aero performance on race day.
Bikerumor logoBikerumor
The Reacto is a genuinely excellent bike.
BikeRadar logoBikeRadar

Feedback?

View all reviews

Cyclist
Merida Reacto 4000 review

Jan 2022 · Matthew Loveridge

Merida's most affordable aero bike retains the pro machine's best qualities

Highs
  • Exciting

  • Racy ride

  • Comfortable

  • Super-clean design

Lows
  • Basic wheels

  • Non-tubeless tyres

Read Review

BikeRadar
Merida Reacto 4000 review

Aug 2021 · Matthew Loveridge

The Reacto is a star performer on the road and it’s good enough to justify big upgrades down the line

Highs
  • Superbike-like ride

  • Ultra-modern design

  • Clean cockpit

Lows
  • Better wheels and tyres would really let it shine

Read Review

Cycling Weekly
Merida Reacto Team-E

Sep 2020 · James Bracey

Does the newly launched 4th edition improve on the existing aero focussed race bike?

Highs
  • Translates every watt into forward momentum

  • Razor sharp handling

  • Impressive comfort for an aero bike

Lows
  • Seat clamp rubber cap keeps sliding up the seatpost

Read Review

Bikerumor
2021 Merida Reacto aero road bike is faster, more comfortable & more versatile, ready for any race!

Jul 2020 · Cory Benson

Merida's Reacto aero road bike enters gen 4 with an all-new lightweight carbon frameset that is faster than ever, while adding even more versatility...

Read Review

Gran Fondo Magazine
2021 MERIDA REACTO in review – An aerodynamic jack of all trades?

Jul 2020 · By

The brand new 2021 MERIDA REACTO in review. Aerodynamic optimisation, ample tire clearance and comfort!

Highs
  • Very composed

  • Good vibration damping

  • All-round abilities

  • Cable routing and level of integration

Lows
  • Front end susceptible to crosswinds

Read Review

Cycling News
Merida Reacto LTD review

Mar 2020 · Graham Cottingham

One month into our longterm test and the Merida Reacto LTD road bike is already impressing us

Highs
  • Effortless straight-line speed

  • Scything high-speed cornering capabilities

  • Dampening when dealing with large impacts

Lows
  • Doesn't come with tubeless tyres as standard

  • The rear light is far from reliable

Read Review

road.cc
Merida Reacto Disc 4000

Jun 2019 · Stu Kerton

A fast machine with sorted geometry, but its firm ride won't appeal to all

Read Review

Geometry
Specs
Build
Frame

REACTO CF3 IV, material: carbon, 700x30C max. wheelsize, 100x12/ 142x12mm axle standard, BB86,5 bottom bracket standard

BB StandardBB86/BB92, 86.5mm, Press Fit

Tire Clearance30c

Fork

REACTO CF5 IV DISC, material: carbon, 700x30C max. wheelsize

Bottom Bracket

SM-BB71-41B, Pressfit 86.5

Headset

FSA ACR

Stem

FSA SMR ACR, material: aluminium, -6° stem angle, 90 mm-XXS/XS, 100 mm-S, 110 mm-M, 120 mm-L/XL

Handlebar

MERIDA EXPERT CW, material: aluminium, 380mm (XXS), 400mm (XS-S), 420mm (M), 440 (L-XL)

Saddle

MERIDA EXPERT CC

Seatpost

MERIDA TEAM CW, Aero shape, 15mm setback, Carbon

TypeRigid

Groupset
Rear Derailleur

Shimano 105, GS

Front Derailleur

Shimano 105

Crank

Shimano 105, 52-36 teeth, 165 mm-XXS, 170 mm-XS/S, 172.5 mm-M, 175 mm-L/XL

Shifters

Shimano 105 disc

Cassette

Shimano CS-R7000, 11-30 teeth, 11 speed

Chain

KMC X11

Brakes

Shimano 105, Hydraulic disc

TypeShimano 105 Hydraulic Disc

Brake Levers

Shimano 105 R7000

Wheels
Rims

MERIDA EXPERT CW, 19mm inner width, 30mm height, material: aluminium, Tubeless ready (tubeless tape and valves not included)

Spokes

Double Butted Black stainless

Front Hub

VP CLK170F / VP 270SB, 100x12mm width front hub, 28 spoke holes, Centerlock, 12-142mm width rear hub, 28 spoke holes, Centerlock

Rear Hub

VP CLK170F / VP 270SB, 100x12mm width front hub, 28 spoke holes, Centerlock, 12-142mm width rear hub, 28 spoke holes, Centerlock

Tires

Front: Continental Ultra Sport III, 700x25C, fold, Rear: Continental Ultra Sport III, 700x25C, fold

Disc Rotors

Shimano RT54, 160mm

Accessories
Lights

REACTO light seat post + Battery

Rider Notes
Riders Also Viewed

First added July 31

Last updated April 4

Not listed for 1,516 days