The perfect combination of a class-leading aero frame and well chosen components makes the 5000 the most successful REACTO in our line-up. It is the ideal aero bike for your next steps into the racing world as well as challenging your riding buddies.
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The most popular REACTO in our line-up. The 5000 features our proven CF3 carbon aero frame with complete cable integration and tyre clearance of up to 30 mm tyres. Wider tyres in combination with the remarkable S-FLEX carbon seat post provide impressive comfort for an aero bike, while the race-proven geometry keeps handling sharp yet predictable. The REACTO is the perfect bike for when you want to leave your mark at the races or just be the fastest out of all your riding buddies.

Newly launched in 2021, the latest version of the REACTO took the cycling press by storm. A long string of test wins, perfect scores and awards confirm our successful symbiosis of the race-proven DNA of the previous model with the latest trends and technologies. Cycling Weekly calls it 'without doubt one of the most complete bikes available on the market', Cyclingnews 'an utterly brilliant and faultless machine' and Cycling Plus were 'hugely impressed'. From serious racer via enthusiast to the ambitious road rider, the REACTO is a great bike for many people. Its outstanding aerodynamic performance, reduced weight, sharp handling and super quick acceleration makes it the perfect bike for criterium racers and sprinters. At the same time, the class-leading comfort gives it the ability to play out its aerodynamic advantage also on the cobblestones – or the idyllic but potholed littered lanes of your favourite training ride.

  • Lightweight CF3 carbon aero frame (approx. 1,150 g - in size M)
  • Shimano Ultegra 11-speed groupset
  • FSA ACR SMR stem/MERIDA EXPERT CW handlebar combination
  • MERIDA S-FLEX carbon aero post
  • DISC COOLER technology and WIRE PORT cable integration
  • Seat post integrated rear light
  • material: carbon
  • 700x30C max. wheelsize
  • 100x12/ 142x12mm axle standard
  • BB86,5 bottom bracket standard
frame size XXS, XS, S, M, L, XL
  • material: carbon
  • 700x30C max. wheelsize
brake lever Shimano Ultegra
headset FSA ACR
  • material: aluminium
  • 380mm (XXS)
  • 400mm (XS-S)
  • 420mm (M)
  • 440 (L-XL)
  • material: aluminium
  • -6° stem angle
  • 90 mm-XXS/XS, 100 mm-S, 110 mm-M, 120 mm-L/XL
grip One-Touch
derailleur (f) Shimano Ultegra
shifters Shimano Ultegra Disc
  • Aero shape
  • 15mm setback
  • Carbon
seat clamp MERIDA REACTO Aero
  • V-mount
  • incl. MERIDA minitool
chain KMC X11
  • 52-36 teeth
  • 165 mm-XXS/XS, 170 mm-S, 172.5 mm-M, 175 mm-L/XL
  • 11-30 teeth
  • 11 speed
bottom bracket SM-BB71-41B, Pressfit 86.5
  • 100x12mm width front hub
  • 28 spoke holes, Centerlock
  • 12-142mm width rear hub
  • 28 spoke holes
  • Centerlock
  • 19mm inner width
  • 30mm height
  • material: aluminium
  • Tubeless ready (tubeless tape and valves not included)
  • including removable lever
  • 6/4mm allen key
spokes Double Butted Black stainless
light rear REACTO light seat post + Battery
max. weight 120 kg
Bike Frame Geometry Image
Frame Size XXS XS S M L XL
Tyre Sizes 28" 28" 28" 28" 28" 28"
ST seat tube [mm] 470 500 520 540 560 590
TT top tube [mm] 520 536 545 560 575 590
CS chain stay length [mm] 408 408 408 408 408 408
HTA head tube angle [°] 70.5 72 72.5 73.5 73.5 74
STA seat tube angle [°] 74.5 74 74 73.5 73 73
BD bottom bracked drop [mm] 70 70 66 66 66 66
HT head tube [mm] 105 112 128 140 155 176
FL fork length [mm] 385 385 385 385 385 385
R reach [mm] 377 384 390 395 400 409
S stack [mm] 517 529 542 557 571 593
WB wheel base [mm] 985 983 990 990 999 1010
SH stand over height [mm] 746 771 792 810 826 853
No. Item-No. Name Info Pieces Torque NM
1 A2029000035 TUBE foam; ID6mm L350mm 1
2 A2029000028 TUBE foam; ID5mm L400mm 1
3 A2054000107 EXPANDER for fork steerer ID 23.6mm 1
4 A2191000187 HEADSET FSA NO.55R 1.5"/ACR/STD (TH-MR127, TH-MR168) 1
5 A2029000055 TUBE woven; L40mm for size XXS/XS 1
5 A2029000056 TUBE woven; L60mm for size S 1
5 A2029000057 TUBE woven; L70mm for size M 1
5 A2029000058 TUBE woven; L90mm for size L 1
5 A2029000059 TUBE woven; L105mm for size XL 1
6 A2164000060 DISC COOLER front; for FM160/FM180 1
7 A2298000265 SCREW M5x0.8 L16mm 2 6~8
8 A2002000103 THRU AXLE EXPERT SL; L=120mm M12x1.5 TL=12mm 1
9 A2248000035 CLAMP for saddle rail; left inner part 1
10 A2248000031 CLAMP for saddle rail; left outer part 1
11 A2248000034 CLAMP for saddle rail; right inner part 1
12 A2248000030 CLAMP for saddle rail; right outer part 1
13 A2300000259 SCREW M6x1 L45mm 2 10~12
14a A2128000052 COVER for S-FLEX seatpost; with LED light 1
14b A2129000081 COVER for S-FLEX seatpost, w/o light 1
15 A2347000024 COVER for seatpost clamp 1
16 A2247000084 CLAMP for seatpost 1 5~6
17 A2298000059 SCREW M5x0.8 L15mm 4 3~4
18 A2136000053 MOUNT for FD 1
19 A2143000130 BLIND PLUG 1
20 A2143000095 CABLE PLUG for Di2 1
21 A2322000034 PROTECTOR for chain stay 1
22 A2311000104 RD HANGER DH-068 for ROAD-RD 1
23 A2311000103 RD HANGER DH-067 for SHIMANO direct mount 1
24 A2300000129 SCREW M3x0.5 L10mm 1 2~4
25 A2143000131 BLIND PLUG 1
26 A2143000082 CABLE PLUG for mechanical 1
27 A2143000121 CABLE PLUG for Di2 1
28 A2164000061 DISC COOLER rear; for FM140/FM160 1
29 A2002000104 THRU AXLE EXPERT SL; L=162.5mm M12x1.5 TL=12mm 1

To reduce production and delivery times, we are sometimes forced to make last-minute specification changes. Please be aware that those changes might not be reflected on these product pages and images.




Our X-Tapered headtube offers the space for a tapered fork to be fitted. Tapered forks offer superb stiffness and precise and deliver confidence-inspiring steering.



Cables are routed through the frame, entering and exiting through smooth sockets. The bike looks neat, whilst the cables are protected from moisture and dirt.



To protect the integrity of carbon frames, the fibres are bonded together with an epoxy resin with added nano particles, increasing impact resistance by up to 40%.



When creating the individual carbon elements, an inflatable bladder is used to ensure there are no wrinkles inside the tube as these can add weight and create weakness. This results in a lighter, stiffer and stronger frame.



The aerodynamics are based around a NACA0028 teardrop profile (National Advisory Committee for Aeronautics) which is truncated. Air moves around the tube as though the missing rear section of the teardrop were still there, saving weight by using less material.



A forged aluminium component under the front and/or rear caliper allowing heat to dissipate through CNC-milled cooling fins. Tests show that temperatures are reduced by around 35 % and cooling times are shortened, optimising the performance of the brake.



Designing WorldTour bikes is similar to Formula 1: apparently nondescript details can result in saving split seconds. Integrated seat-post clamping minimises turbulence at the top tube.



MERIDA designed headsets that allow all control cables to enter the frame through the headset, creating a clean and uncluttered look, without making structural changes to the frame. Depending on the model, the cables are run completely internally (including bar and stem) or semi-integrated where the cables enter the frame underneath the stem.