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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%.
Specification
| Frame | CF5 IV - carbon - Premium fibres for lightweight and performance, race geometry. Internal cable routing, 142 x12mm axle standard, flat mount rear brakes with Disc Cooler, 1 1/2" to 1 1/4" headtube. Max tyre size - 30c |
|---|---|
| Fork | Reacto CF5 IV Disc; full carbon, tapered steerer. Max tyre size: 700 x 30c - Disc cooler technology |
| Headset | FSA ACR 3MM thinner neck |
| Shift Levers | Shimano Ultegra Di2 |
| Front Derailleur | Shimano Ultegra Di2; FD-R8150 |
| Rear Derailleur | Shimano Ultegra Di2; RD-R8150 |
| Speeds | 24 |
| Cassette | Shimano CS-R8101; 11-30 teeth; 12 speed |
| Chain | Shimano CN-M8100-12 |
| Chainset | Shimano Ultegra; 52-36 tooth chainset ; Crank length - 165mm (XXS), 170mm (XS), 172.5mm (S/M/L), 175mm (XL) |
| Bottom Bracket | SM-BB72-41B, Pressfit 86.5 |
| Brake Type | Hydraulic disc |
| Brake Lever | Shimano Ultegra |
| Front Brake | Shimano Ultegra; Hydraulic disc brake caliper with Shimano CL800; 160mm rotor |
| Rear Brake | Shimano Ultegra; Hydraulic disc brake caliper with Shimano CL800; 160mm rotor |
| Wheel Size | 700c |
| Rim | Part of wheelset - Reynolds BL60 Expert DB, 21mm inner rim width; 41mm rim depth; carbon; Tubeless ready (tubeless tape and valves included) |
| Spokes | Part of wheelset |
| Front Hub | Part of wheelset - Reynolds BL60 Expert DB, 100 x 12mm; Centerlock; |
| Rear Hub | Part of wheelset - Reynolds BL60 Expert DB, 142 x 12mm; Centerlock; Shimano HG |
| Front Tyre | Continental Grand Prix 5000S TR; 700 x 28c; Kevlar bead; tubeless ready |
| Rear Tyre | Continental Grand Prix 5000S TR; 700 x 28C; Kevlar bead; tubeless ready |
| Stem | Vision Metron 5D ACR EVO; carbon - Length - 90mm (XXS-XS), 100mm (S), 110mm (M-L), 120mm (XL) |
| Handlebar | Vision Metron 5D ACR EVO; carbon; 380mm (XXS-XS-S); 400mm (M-L-XL) |
| Grips | Merida Expert |
| Saddle | Scratch M5 with V-mount adapter; includes Merida minitool |
| Seat Post | Merida Team CW; Aero shape; 15mm layback; Carbon |
Geometry

Please be aware that images and descriptions are usually supplied by the brand / manufacturer and are in no way affiliated with Cycle Centre Congleton Limited T/A CycleStore. We only resell items from third parties and do not design or manufacture any products. Product information is compiled automatically from supplier data and occasional errors can occur — if a detail such as size, specification or price looks incorrect, please contact us to confirm before ordering.
| Order Value | Service | Estimated Delivery | Cost |
|---|---|---|---|
| Under £39.99 | Royal Mail Tracked | 2–3 working days from dispatch | £4.99 |
| £39.99 and over | Royal Mail Tracked | 2–3 working days from dispatch | FREE |
| Any order — Express | Royal Mail Tracked 24hr / Parcel Force 24hr | Next working day from dispatch | £6.99 |
| Bikes | Parcel Force 48hr Signed For | 2 working days from dispatch | FREE |
Delivery times shown are from dispatch, not from the point of ordering. As we source products from a range of suppliers, lead times can vary — please check the product page, your cart, or your order confirmation for the most accurate estimate for this item.
Some remote UK postcodes (Highlands, Islands) may carry a courier surcharge on larger orders — we will always contact you before applying any additional charge.
Questions? Email sales@cyclestore.co.uk with your order number.

