The Reacto has long been a class-leading aero road bike, combining state-of-the-art aerodynamics with rider comfort. The latest generation was designed around wider tyres for extra comfort, and because wider tyres add drag, Merida made a host of small improvements to more than make up for it.
At World Tour level no area can be ignored, so Merida used Computational Fluid Dynamics (CFD) to model virtual wind tunnel performance and guide the changes with the biggest aerodynamic benefit. Details like tucking the front Disc Cooler behind the fork, integrating the rear caliper into the rear triangle and designing new thru-axles with the thread built into the fork dropout all reduce drag. The range-topping Reacto CF5 needs just 209 watts to hold 45km/h, and the Reacto 4000's CF3 frame shares the same geometry and aerodynamic profiling with a more budget-friendly carbon layup.
Every Reacto has powerful hydraulic disc brakes with chainstay-mounted flat mount calipers, sitting on CNC-machined aluminium Disc Cooler fins that cut operating temperatures by up to 35%. The 4000 is built with Shimano's 105 12-speed groupset and Continental Grand Prix 28mm tyres. Cycling Weekly called the Reacto "without doubt one of the most complete bikes available on the market".
Features
- Reacto CF3 carbon frame with the same geometry and aero profiling as the CF5
- CFD-optimised aerodynamics with integrated Disc Cooler and rear caliper
- Shimano 105 12-speed groupset with 52-36T chainset and 11-34T cassette
- Shimano 105 hydraulic disc brakes with Disc Cooler fins
- Continental Grand Prix 28mm tyres, with clearance for 30mm
- Merida Team CW aero carbon seatpost
Specifications
DisciplineAero Road
MaterialCarbon
Wheel Size700c
WarrantyLifetime
Frame - CF3 IV; carbon with the same geometry and aerodynamic profiling as the CF5 IV with a more budget-friendly carbon layup. Tapered head tube, Disc Cooler, BB86 BB standard, 142x12mm axle standard. Max tyre size 700x30c
Fork - Reacto CF3 IV Disc; material: carbon; 700x30c max tyre size
Headset - Merida Team SL (OP-203 neck)
Stem - Merida Expert SL 2PII; material: aluminium; -9 degree rise; length: XXXS-XS 90mm, S 100mm, M-L 110mm, XL 120mm
Handlebar - Merida Expert CW; material: aluminium; XXXS-S 380mm wide, M-L 400mm wide, XL 420mm wide
Bar tape - Merida Road Expert
Brake type - Hydraulic disc
Brake levers - Shimano 105
Front brake - Shimano 105; hydraulic disc with Shimano RT54; 160mm
Rear brake - Shimano 105; hydraulic disc with Shimano RT54; 160mm
Front tyre - Continental Grand Prix; 700x28c; Kevlar bead
Rear tyre - Continental Grand Prix; 700x28c; Kevlar bead
Wheel size - 700c
Rims - Merida Expert CW; 19mm inner rim width; 30mm rim depth
Spokes - Double butted black stainless
Front hub - Shimano HB-TC500; 100x12mm; 28 spoke; Centerlock
Rear hub - Shimano FH-TC500-HL; 12x142mm; 28 spoke; Centerlock
Speeds - 24
Front derailleur - Shimano 105
Rear derailleur - Shimano 105; GS
Shift levers - Front: Shimano 105 disc, Rear: Shimano 105 disc
Chain - Shimano M6100-12
Cassette - Shimano 105 R7101; 11-34 teeth; 12 speed
Chainset - Shimano 105 R7100; 52-36 tooth; crank length: XXXS 160mm, XXS-XS 165mm, S-M 170mm, L-XL 172.5mm
Bottom bracket - Shimano SM-BB71-41B; Pressfit 86.5
Pedals - Not included
Saddle - Merida Expert SL; 6% recycled and 23% natural material; V-mount; incl. Merida mini tool
Seatpost - Merida Team CW; aero shape; 15mm layback; material: carbon
Reacto 4000 2026
- Road
- Carbon frame
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The Reacto has long been a class-leading aero road bike, combining state-of-the-art aerodynamics with rider comfort. The latest generation was designed around wider tyres for extra comfort, and because wider tyres add drag, Merida made a host of small improvements to more than make up for it.
At World Tour level no area can be ignored, so Merida used Computational Fluid Dynamics (CFD) to model virtual wind tunnel performance and guide the changes with the biggest aerodynamic benefit. Details like tucking the front Disc Cooler behind the fork, integrating the rear caliper into the rear triangle and designing new thru-axles with the thread built into the fork dropout all reduce drag. The range-topping Reacto CF5 needs just 209 watts to hold 45km/h, and the Reacto 4000's CF3 frame shares the same geometry and aerodynamic profiling with a more budget-friendly carbon layup.
Every Reacto has powerful hydraulic disc brakes with chainstay-mounted flat mount calipers, sitting on CNC-machined aluminium Disc Cooler fins that cut operating temperatures by up to 35%. The 4000 is built with Shimano's 105 12-speed groupset and Continental Grand Prix 28mm tyres. Cycling Weekly called the Reacto "without doubt one of the most complete bikes available on the market".
Features
- Reacto CF3 carbon frame with the same geometry and aero profiling as the CF5
- CFD-optimised aerodynamics with integrated Disc Cooler and rear caliper
- Shimano 105 12-speed groupset with 52-36T chainset and 11-34T cassette
- Shimano 105 hydraulic disc brakes with Disc Cooler fins
- Continental Grand Prix 28mm tyres, with clearance for 30mm
- Merida Team CW aero carbon seatpost
Specifications
DisciplineAero Road
MaterialCarbon
Wheel Size700c
WarrantyLifetime
Frame - CF3 IV; carbon with the same geometry and aerodynamic profiling as the CF5 IV with a more budget-friendly carbon layup. Tapered head tube, Disc Cooler, BB86 BB standard, 142x12mm axle standard. Max tyre size 700x30c
Fork - Reacto CF3 IV Disc; material: carbon; 700x30c max tyre size
Headset - Merida Team SL (OP-203 neck)
Stem - Merida Expert SL 2PII; material: aluminium; -9 degree rise; length: XXXS-XS 90mm, S 100mm, M-L 110mm, XL 120mm
Handlebar - Merida Expert CW; material: aluminium; XXXS-S 380mm wide, M-L 400mm wide, XL 420mm wide
Bar tape - Merida Road Expert
Brake type - Hydraulic disc
Brake levers - Shimano 105
Front brake - Shimano 105; hydraulic disc with Shimano RT54; 160mm
Rear brake - Shimano 105; hydraulic disc with Shimano RT54; 160mm
Front tyre - Continental Grand Prix; 700x28c; Kevlar bead
Rear tyre - Continental Grand Prix; 700x28c; Kevlar bead
Wheel size - 700c
Rims - Merida Expert CW; 19mm inner rim width; 30mm rim depth
Spokes - Double butted black stainless
Front hub - Shimano HB-TC500; 100x12mm; 28 spoke; Centerlock
Rear hub - Shimano FH-TC500-HL; 12x142mm; 28 spoke; Centerlock
Speeds - 24
Front derailleur - Shimano 105
Rear derailleur - Shimano 105; GS
Shift levers - Front: Shimano 105 disc, Rear: Shimano 105 disc
Chain - Shimano M6100-12
Cassette - Shimano 105 R7101; 11-34 teeth; 12 speed
Chainset - Shimano 105 R7100; 52-36 tooth; crank length: XXXS 160mm, XXS-XS 165mm, S-M 170mm, L-XL 172.5mm
Bottom bracket - Shimano SM-BB71-41B; Pressfit 86.5
Pedals - Not included
Saddle - Merida Expert SL; 6% recycled and 23% natural material; V-mount; incl. Merida mini tool
Seatpost - Merida Team CW; aero shape; 15mm layback; material: carbon
Returns Information
Reviews
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