REACTO 4000
The feeling of speed connects all road riders. Whether you’re a professional or a recreational rider, the goal is the same: push harder, go faster, and feel free on the road. Nothing represents that better than the REACTO.
The thrill of speed at a price that's hard to ignore. We've packed in a huge amount of performance and value by using our latest more aerodynamic CF3 carbon frame and pairing it with high-value, no nonsense kit. The ideal starting point for any aspiring road rider or racer.
The perfect entry to our aero bike range. The REACTO 4000 uses exactly the same super-aero frame shape as our top level models, but by combining our lightweight CF3 carbon frame with high-value components, we've created a bike with performance that puts more expensive machines to shame. Using the utterly reliable Shimano 105 groupset with hydraulic disc brakes and some choice components, it's ready to ride and race from the box, as well as being a great platform to upgrade as you progress.
The thrill of speed is what unites road cyclists. Whether professional or amateur, the fundamental goal is to push harder, chase speed and break free. Nothing embodies this better than the REACTO. The latest generation of the REACTO builds on the previous model, with fundamental changes that further improve its aerodynamics, reduce its weight and offer tyre clearance up to 32 mm, all while maintaining the comfort and control the REACTO is known for. While the REACTO ONE substantially undercuts the 200-watt barrier as measured according to Tour Magazine's test standards and sets a new internal benchmark for aerodynamic performance, other bikes in the range offer the perfect balance between aerodynamics, comfort and control. Whatever your focus — low drag, low weight, or all-round performance — you will find the perfect REACTO in our latest line-up.
Whatever your focus — low drag, low weight, or all-round performance — you will find the perfect REACTO in our latest line-up.
The thrill of speed at a price that’s hard to ignore.
Lightweight CF3 carbon aero frame (approx. 1,185 g – size M)
Shimano 105 12-speed mechanical groupset with hydraulic disc brakes
Merida Expert CW handlebar and Expert SL stem
Merida Expert CW wheelset with Continental Grand Prix 28 mm tyres
Merida S-FLEX carbon aero seat post
Disc Cooler technology
Specifications REACTO 4000
700x32C max.
100x12/ 142x12mm thru axle
PressFit Road 86.5 bottom bracket standard
700x32C max.
Shimano RT54 160mm rotors
380mm (XXS-XS-S)
400mm (M-L)
420mm (XL)
-9° stem angle
90 mm-XXS/XS, 100 mm-S, 110 mm-M/L, 120 mm-XL
0mm setback
Carbon
S-Flex
165 mm-XXS/XS, 170 mm-S/M, 172.5 mm-L/XL
12 speed
142x12mm width rear hub
28 holes
Centerlock
30 mm rim height
material: aluminium
Tubeless ready (tubeless tape and valves not included)
fold
Geometries REACTO 4000 SILK BLACK (BLACK)
| Sizes | XXS | XS | S | M | L | XL |
| Top Tube length -TT (mm) : | 521 | 535 | 545 | 560 | 575 | 590 |
| Seatpost Tube - ST (mm) : | 470 | 500 | 520 | 540 | 560 | 590 |
| Seat Stay - CS (mm) : | 410 | 410 | 410 | 410 | 410 | 410 |
| Head Tube Angle - HTA (°) : | 70,5 | 72 | 72,5 | 73,5 | 73,5 | 74 |
| Seatpost tube angle - STA (°) : | 74,5 | 74 | 74 | 73,5 | 73 | 73 |
| Bottom bracket drop - BD (mm) : | 70 | 70 | 66 | 66 | 66 | 66 |
| Head Tube length - HT (mm) : | 105 | 112 | 128 | 140 | 155 | 175 |
| Fork length - FO (mm) : | 385 | 385 | 385 | 385 | 385 | 385 |
| Reach - R (mm) : | 377 | 384 | 390 | 395 | 400 | 409 |
| Stack - S (mm) : | 517 | 529 | 542 | 557 | 571 | 593 |
| Wheelbase - WB (mm) : | 987 | 984 | 992 | 992 | 1002 | 1011 |
| Stand over height - SH (mm) : | 746 | 771 | 792 | 810 | 826 | 853 |
Check delivery time and order your Road bike
Buy online the Road bike REACTO 4000 SILK BLACK (BLACK) 2027 and have the bike delivered at a Merida dealer of your choice. . Choose from more than 600 dealers in the Benelux or Denmark..
Reviews REACTO 4000
The Merida REACTO 4000 is reviewed with a
10 on average, based on
3 customer reviews.
These reviews are only from people who have registered their purchased MERIDA bike with a unique frame number on this website. It is not possible to write a review without registering the bike. We reserve the right to process negative reviews for a maximum of 5 working days in order to provide them with the correct response.
Reactie by Merida at 16-03-2026
Fijn om te lezen dat je zo enthousiast bent over jouw Merida fiets. Wij wensen je veel plezierige en veilige fietskilometers toe! Met sportieve groet, Team Merida Benelux
Reactie by Merida at 27-09-2025
Bedankt voor je positieve review. Veel fietsplezier gewenst namens het Merida team!
Reactie by Merida at 24-02-2025
Bedankt voor de uitgebreide review. Wat fijn om te lezen dat jullie goed geholpen zijn bij onze dealer Anvelo, en natuurlijk content zijn met de fiets. Wij wensen je vele mooie en veilige kilometers met de Reacto 4000! Met sportieve groet, Team Merida Benelux
Merida Benelux BV
Laan van Westenenk 102
7336 AZ Apeldoorn
Postbus 799
7301 BA Apeldoorn
Nederland
+31(0)55 506 2200
info@merida.nl
www.merida.nl
Merida Experience Center
Laan van Westenenk 102
7336 AZ Apeldoorn
Nederland
+31(0)55 506 1001
info@merida.nl
www.merida.nl
Subject to change; due to continuous development Merida reserves the right to change any or all specifications and/or prices without prior notice.
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