Merida Reacto 4000

2026 RoadAero Manufacturer page

Price: Not published

Prices shown first for United States
United Kingdom: £2,400 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 36–52t / 11–34t
Gear range: 446%
Weight: 9 kg 19.8 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

20 of 22 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

REACTO CF3 IV, material: carbon, 700x30C max. wheelsize, 100x12/ 142x12mm axle standard, BB86,5 bottom bracket standard Not identified

Suspension

1 part

Fork
- Merida

Drivetrain

7 parts

Bottom bracket
- Shimano SM-BB71-41B
SM-BB71-41B
Cassette
- Shimano 105 CS-R7101-12 12 speeds
CS-R7101-12
Chain
- Shimano Deore CN-M6100
CN-M6100
Crankset
- Shimano 105 FC-R7100 12 speeds
FC-R7100
Front derailleur
- Shimano 105
Rear derailleur
- Shimano 105
Shifters
- Shimano 105

Brakes

3 parts

Wheels and tires

5 parts

Front hub
- Shimano HB-TC500
HB-TC500
Rear hub
- Shimano FH-TC500-HL 12 speeds
FH-TC500-HL
Rims
- Merida
Spokes

Double Butted Black stainless Not identified
Tires
- Continental

Cockpit and contact points

5 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size SM

Table

Reach 390mm

Stack 542mm

Wheelbase 990mm

Head angle 72.5°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	377	384	390	395	400	409
Stackmm	517	529	542	557	571	593
Top tube lengthmm	520	536	545	560	575	590
Seat tube lengthmm	470	500	520	540	560	590
Head tube lengthmm	105	112	128	140	155	176
Head tube angle	70.5°	72°	72.5°	73.5°	73.5°	74°
Seat tube angle	74.5°	74°	74°	73.5°	73°	73°
Chainstay lengthmm	408	408	408	408	408	408
Wheelbasemm	985	983	990	990	999	1010
Front centermm	587	585	591	591	600	611
Bottom bracket dropmm	70	70	66	66	66	66
Bottom bracket heightmm	266	266	270	270	270	270
Standover heightmm	746	771	792	810	826	853
Fork rakemm	45	46	45	45	45	45
Trailmm	71	61	59	53	53	50
Stack/reach ratio	1.37	1.38	1.39	1.41	1.43	1.45

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon
Bicycle weight: 9 kg

19.8 lb
Weight limit: 120 kg

264.6 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 36
Largest chainring: 52
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 30.7 in
Highest gear: 137.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB86/BB92
Tire clearance: Maximum tire width: 30c; Additional specification: Wheel kind: 700
Tire width: 28c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

30.7 gear inches

This value is within the central range for this class.

Cohort: Road / Aero Model year: 2026
Sample: 285 bicycles with this information
Coverage: 80.0% of the class

Highest gear

137.1 gear inches

This value is within the central range for this class.

Cohort: Road / Aero Model year: 2026
Sample: 285 bicycles with this information
Coverage: 80.0% of the class

Shifting

Mechanical

272 of 354 bicycles with this information use electronic shifting.

Cohort: Road / Aero Model year: 2026
Sample: 354 bicycles with this information
Coverage: 99.4% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.8 km/h
Highest gear: 52.5 km/h

Total gear range 446%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 30.7–137.1 gear inches
Class reference (p10–p90): 28.2–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Aero Model year: 2026
Lowest gear: 285 bicycles with this information, 80.0% of the class
Highest gear: 285 bicycles with this information, 80.0% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle Merida Reacto 4000	Merida Reacto 5000	Merida Reacto 6000	Merida Reacto 7000	Merida Reacto 8000	Merida Reacto 9000
Frame
Bicycle weight	9 kg	9 kg	8.7 kg	8.4 kg	8.7 kg	7.5 kg
Drivetrain
Smallest chainring	36	36	36	35	36	36
Largest chainring	52	52	52	48	52	52
Smallest sprocket	11	11	11	10	11	11
Largest sprocket	34	34	34	36	30	30
Lowest gear	30.7 in	30.7 in	30.7 in	28.2 in	34.8 in	34.8 in
Highest gear	137.1 in	137.1 in	137.1 in	139.2 in	137.1 in	137.1 in
Cockpit
Shifting	Mechanical	Electronic	Electronic	Electronic	Electronic	Electronic
Other specifications
Wheel material	Aluminum	Aluminum	Carbon	Carbon	Carbon	Carbon
Power meter	Not informed	Not informed	Not informed	SRAM Rival AXS, 48-35 teeth, Power Meter, 160 mm-3S, 165 mm-XXS/XS, 170 mm-S/M, 172.5 mm-L/XLAdditional specification: Model display: Rival AXSAdditional specification: Model id: rival-axs	Not informed	Shimano Ultegra, 52-36 teeth, left arm 4IIII PM, 160 mm-3S, 165 mm-XXS/XS, 170 mm-S/M, 172.5 mm-L/XL