REACTO 5000

Carbon aero bike in ProTour team replica colours - looks fast even when standing still! Equipped with 2 x 11 Shimano Ultegra shifters and derailleurs.
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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%.

  • Aero optimised carbon frameset
  • Shimano Ultegra 2 x 11 shifters and derailleurs
  • Shimano Ultegra hydraulic discs
  • Continental Ultra Sport III 25c tyres
  • Merida S-Flex seat post
  • Disc Cooler technology
  • material: carbon
  • 700x30C max. wheelsize
  • 100x12/ 142x12mm axle standard
  • BB86,5 bottom bracket standard
frame size XS, S, M, L, XL
  • material: carbon
  • 700x30C max. wheelsize
  • 19mm inner width
  • 30mm height
  • material: aluminium
  • Tubeless ready (tubeless tape and valves not included)
  • 100x12mm width front hub
  • 28 spoke holes, Centerlock
  • 12-142mm width rear hub
  • 28 spoke holes
  • Centerlock
  • 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
crank size 165 mm-XXS/XS, 170 mm-S, 172.5 mm-M, 175 mm-L/XL
bottom bracket SM-BB71-41B, Pressfit 86.5
  • 11-30 teeth
  • 11 speed
chain KMC X11
shifters Shimano Ultegra disc
front derailleur Shimano Ultegra
brake lever Shimano Ultegra
headset FSA ACR
  • material: aluminium
  • -6° stem angle

  • 90 mm-XXS/XS, 100 mm-S, 110 mm-M, 120 mm-L/XL

stem size 90 mm-XXS/XS, 100 mm-S, 110 mm-M, 120 mm-L/XL
  • material: aluminium
  • 380mm (XXS)
  • 400mm (XS-S)
  • 420mm (M)
  • 440 (L-XL)
grip One-Touch
  • Aero shape
  • 15mm setback
  • Carbon
  • V-mount
  • incl. MERIDA minitool
seat clamp MERIDA REACTO Aero
lights REACTO light seat post + Battery
Bike Frame Geometry Image
Frame Size XS S M L XL
Tyre Sizes 28" 28" 28" 28" 28"
St Seat Tubes mm 500 520 540 560 590
Tt Top Tubes mm 536 545 560 575 590
Cs Chain Stays mm 408 408 408 408 408
HTA head tube angle [°] 72 72.5 73.5 73.5 74
STA seat tube angle [°] 74 74 73.5 73 73
Bd Bottom Bracket Drops mm 70 66 66 66 66
Ht Head Tube Lengths mm 112 128 140 155 176
Fl Fork Lengths mm 385 385 385 385 385
R Reach mm 384 390 395 400 409
S Stacks mm 529 542 557 571 593
Wb Wheel Base mm 983 990 990 999 1010
Sh Stand Over Height mm 771 792 810 826 853

Technology

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X-TAPER HEADTUBE

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.

X-TAPER HEADTUBE
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INTERNAL CABLE ROUTING

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.

INTERNAL CABLE ROUTING
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NANO MATRIX CARBON

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%.

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AWS

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.

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NACA FASTBACK PROFILE

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.

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DISC COOLER

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.

DISC COOLER
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INTERNAL CLAMP

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.

INTERNAL CLAMP
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WIRE PORT

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.

WIRE PORT