Shimano Ultegra Di2 equipped super lightweight carbon aero bike complete with Reynolds Aero 65 carbon wheels and Vision Metron integrated carbon cockpit.
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The Merida Reacto has always been a class leading aero bike, combining state of the art aerodynamics with rider comfort.

The 4th generation model is more slippery and beautiful than ever, incorporating wider tyres, much neater cockpit cable integration and a series of incremental improvements to boost performance.

In the world of Pro-Tour racing no area can be ignored. Computational Fluid Dynamics (CFD) calculations were used to model performance in a virtual wind tunnel, guiding the changes which offered the most aerodynamic benefit:

Prototypes were wind tunnel tested following the German TOUR magazine standard, including the ‘moving leg dummy’ test. The Reacto CF5 needs just 209 watts effort for 45 km/h speed, 1 watt faster than its predecessor so it's in the leading group of aero road bikes ever tested by TOUR magazine.

Small details such as integrating the front disc cooler behind the fork and the rear disc caliper in the rear triangle and creating new bolt through axles with the thread integrated into the fork dropout minimise drag and improve aerodynamic performance.

A myriad of small improvements over-compensate for the aerodynamic compromises made to give the Reacto bigger tyres, resulting in the perfect package of comfort, aerodynamic, lightweight and style.

A long string of test wins, perfect scores and awards confirm the successful evolution of the race-proven DNA of the previous model with the latest trends and technologies. Cycling Weekly described it as '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'.

All Reacto come with powerful hydraulic disc brakes. Calipers are mounted on the chainstay for better dissipation of braking forces using the flat mount standard for a neat, flush fit. Calipers sit on top of CNC'd aluminium Disc Cooler fins which reduce operating temperatures by up to 35%.

  • Superlight pro level carbon frameset
  • Shimano Ultegra Di2 groupset
  • Reynolds Aero carbon wheelset with Continental GP5000 25c tyres
  • Vision Metron integrated carbon cockpit
  • Merida S-Flex seat post
  • Disc Cooler technology
model year 2022
  • material: carbon
  • 700x30C max. wheelsize
  • 100x12/ 142x12mm axle standard
  • BB86,5 bottom bracket standard
frame size 3XS, XXS, XS, S, M, L, XL
  • material: carbon
  • 700x30C max. wheelsize
  • 100x12mm width front hub
  • 142x12mm width rear hub
  • 21mm inner width
  • 65mm height
  • Centerlock
  • material: carbon
  • Tubeless ready (tubeless tape and valves included)
  • including removable lever
  • 6/4mm allen key
  • 52-36 teeth
  • 165 mm-XXS/XS, 170 mm-S, 172.5 mm-M, 175 mm-L/XL
bottom bracket Sm-Bb72-41b, Pressfit 86.5
  • 11-30 teeth
  • 12 speed
chain Shimano Cn-M8100-12
shifters Shimano Ultegra Disc Di2
front derailleur Shimano Ultegra Di2
rear derailleur Shimano Ultegra Di2
brake lever Shimano Ultegra
headset FSA ACR
  • material: carbon
  • 100 mm-XXS/XS/S, 110 mm-M, 120 mm-L/XL
stem size 100 mm-XXS/XS/S, 110 mm-M, 120 mm-L/XL
  • material: carbon
  • incl. Garmin mount (E0698+E0699)
  • 400mm (XXS-XS-S)
  • 420mm (M-L-XL)
grip MERIDA Road Expert
  • Aero shape
  • 15mm setback
  • Carbon
seat clamp MERIDA REACTO Aero
saddle Prologo Scratch M5
lights REACTO light seat post + Battery
bottle cage BC156C-D
Bike Frame Geometry Image
Frame Size 3XS XXS XS S M L XL
Tyre Sizes 28" 28" 28" 28" 28" 28" 28"
St Seat Tubes mm 440 470 500 520 540 560 590
Tt Top Tubes mm 505 520 536 545 560 575 590
Cs Chain Stays mm 408 408 408 408 408 408 408
HTA head tube angle [°] 70.5 70.5 72 72.5 73.5 73.5 74
STA seat tube angle [°] 75.5 74.5 74 74 73.5 73 73
Bd Bottom Bracket Drops mm 70 70 70 66 66 66 66
Ht Head Tube Lengths mm 100 105 112 128 140 155 176
Fl Fork Lengths mm 385 385 385 385 385 385 385
R Reach mm 373 377 384 390 395 400 409
S Stacks mm 512 517 529 542 557 571 593
Wb Wheel Base mm 979 985 983 990 990 999 1010
Sh Stand Over Height mm 727 746 771 792 810 826 853
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 A2029000081 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 A2002000152 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.



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Steering precision is vital to safe and confident handling, and the X-TAPER HEADTUBE allows us to significantly boost this precision. A larger headset diameter at the bottom paired with a smaller one at the top helps to deal with the strains modern riding and equipment can put on the headtube, all without adding unnecessary weight. It allows tapered forks to be fitted with ease and delivers precise and confidence-inspiring steering.

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On the majority of our frames, we run the gear and brake cables and hoses through the frame. The cables enter and exit the frame through smooth sockets, or we use one of our other systems like SMART ENTRY or WIRE PORT to be routed through. Running the cables inside the frame protects them from the elements, gives a clean and neat look and can offer aerodynamic advantages.

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NANO MATRIX CARBON is a special kind of carbon fibre where we add extremely tiny, nano-scale particles to the resin that binds the individual carbon fibres together. These then work on a molecular level to protect them from damage. It’s so effective that it can actually increase the finished carbon fibre’s impact resistance by up to 40%, allowing us to build stronger and lighter composite frames that result in a faster and tougher bike.

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This is a method we use to manufacture our carbon fibre frames. First, the carbon fibre that makes up the frame is laid around special formers. We then use a bladder to compress the layers against the outside of the frame mould, giving a smooth and wrinkle-free internal finish, removing any voids in between the layers of carbon that can cause potential weak points, resulting in a stronger, lighter frame.

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This is a special kind of tube shape that helps reduce aerodynamic drag while also helping to reduce weight. It’s based around a teardrop profile that was originally developed in the aeronautical industry, but the rearmost portion of the profile is cut short. This reduces the amount of material needed to make the tube, but air still flows around it just as well, giving all the aerodynamic benefits but at a lower weight.

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Used on our carbon fibre road and gravel bikes, DISC COOLER is a finned piece of forged aluminium that sits between the brake calliper and frame. The aluminium piece helps to draw heat from the braking system and radiates it away quickly. It reduces the temperatures by up to 35% and helps to keep your brakes working at their best for improved control and performance on long descents and under heavy braking.

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When every second counts, the smallest of details can make the difference between winning and losing, so we look at every aspect of our frames to make them as sleek as possible. By using a seat post clamping mechanism that secures the post with a wedge inside the frame itself, we minimise the turbulence and potential drag while keeping post height adjustment simple, giving a frame that is more aerodynamic and also better looking.

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All control cables like gear, brake and dropper post cable enter the frame through a specifically shaped headset cap, cleaning up the cockpit area while also keeping them out of harm's way. Only the internally routed cable for the rear shock lockout enters the frame directly into the top tube for extra smooth lockout action.

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