Merida launches new Reacto
First look at Merida’s Reacto III. This time with a disc option
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Three years on from the Reacto II, Merida has launched the Reacto III. The 2018 model is said to have improved upon the previous model’s comfort, weight and aerodynamics. We’d expect no less.
The claimed aerodynamic improvement is five percent, or 8 watts, at 45km/h. The major drag-reducing factors are slimmer tubes all round, a lowered seat stay/seat tube junction and an integrated cockpit.
Merida describes the aero benefit as follows: “If you do a 100km solo ride on the new Reacto, you’ll save as much energy as riding the same route on a round-tubed road bike, but drafting for 30km of the distance.”
Ride comfort has been increased thanks to new slimmer seatstays, and the narrower width plus larger silicone rubber-filled window of the S-Flex seatpost is said to bring around a 10 percent improvement over the old model.
Taking the complete frame module’s weight in to account sees a saving of 350.5g compared with the outgoing Reacto, or 17.13 percent, which is achieved through slimmer tube profiles and new carbon fibre layups — but frame stiffness remains the same.
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| Reacto 2014 | Reacto 2018 (both M/L | |
| Frame | 1,250g | 1,010g |
| Fork | 406g | 368g |
| Seatpost | 300g | 206g |
| Seatpost clamp | 30g | 30g |
| Headset | 60g | 52.5g |
| Overall | 2,046g | 1,695.5g |
| Gain | -17.13% |
The top-level machine uses FSA’s Metron 5D integrated carbon bar, with proprietary aero shaped headset top cap and spacers beneath to smooth the transition between it and the frame.
Merida says the new bike is designed with aerodynamics in mind, but has been kept simple too for ease of servicing, with straightforward cable routing and brakes.
The narrower head tube means the lower headset bearing is 1 ¼” instead of 1 ½” as before, and all tubes except the top tube and chainstays have NACA Fastback profiles.
In the CF4 carbon spec, the new Reacto’s geometry is almost identical to that of the CF4 Scultura, with a short head tube and longer reach. The CF2 geometry is less aggressive with a taller head tube — on a M/L size I measured it as 20mm longer – and shorter reach.
Of course, alongside the direct mount caliper braked model is a flat mount disc version. The CF4 carbon disc bike’s frame is just 30g heavier than its rim counterpart and the fork adds another 30g.
In the CF2 carbon spec that difference increases to 57g and 40g respectively. While the rim brake bike has conventional quick release skewers, the CF4 disc model runs Focus RAT thru-axles, while the CF2 disc bike has threaded 12mm thru-axles.
It’s designed for 160mm rotors front and rear, and incorporates Merida’s unique disc cooler — a finned forged aluminium structure that slots between the hydraulic caliper and the frame to dissipate excess braking induced heat.
Merida says it reduces temperatures by around 35 percent and much faster than the caliper alone could.
Merida also says the Reacto has clearance for 25mm tyres, although my first impressions are that there’s easily room for more in there, rim calipers permitting.
