Merida BIG.Nine 400

2025 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 11 32t / 11–50t
Gear range: 455%
Weight: 13 kg 28.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

17 of 20 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

BIG.NINE TFS IV, material: aluminum, 29 wheelsize, 135x9mm axle standard, BSA bottom bracket standard, Smooth welding Not identified

Suspension

1 part

Fork
- Manitou

Drivetrain

6 parts

Bottom bracket

BSA, 73mm, threaded Not identified
Cassette
- Shimano CS-LG400-11 11 speeds
CS-LG400-11
Chain
- KMC XGlide 11 speeds
Crankset
- Shimano Cues FC-U6000 11 speeds
FC-U6000
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues SL-U6000
SL-U6000

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Shimano HB-QC300
HB-QC300
Rear hub
- Shimano FH-QC300 11 speeds
FH-QC300
Rims
- Merida
Spokes

Black stainless Not identified
Tires
- Maxxis Rekon Race

Cockpit and contact points

5 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 398mm

Stack 628mm

Wheelbase 1090mm

Head angle 70.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	382	398	414	429
Stackmm	614	628	642	656
Top tube lengthmm	570	590	610	630
Seat tube lengthmm	370	430	470	510
Head tube lengthmm	100	115	130	145
Head tube angle	70°	70°	70°	70°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1069	1090	1110	1131
Front centermm	636	657	677	698
Bottom bracket dropmm	60	60	60	60
Bottom bracket heightmm	314	314	314	314
Standover heightmm	679	727	763	800
Fork rakemm	46	46	45	46
Trailmm	87	87	88	87
Stack/reach ratio	1.61	1.58	1.55	1.53

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: Aluminum
Bicycle weight: 13 kg

28.7 lb
Weight limit: 135 kg

297.6 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 18.6 in
Highest gear: 84.4 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: BSA
Fork spring: Air
Tire width: 2.25″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

2 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,508 bicycles with this information
Coverage: 87.8% of the class

Shifting

Mechanical

222 of 1,648 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,648 bicycles with this information
Coverage: 95.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.1 km/h
Highest gear: 32.3 km/h

Total gear range 455%

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: 18.6–84.4 gear inches

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 2025 builds
Specification	This bicycle Merida BIG.Nine 400	Merida BIG.Nine 100	Merida BIG.Nine 10K	Merida BIG.Nine 15	Merida BIG.Nine 15 SE	Merida BIG.Nine 200
Frame
Frame material	Aluminum	Aluminum	Carbon	Aluminum	Aluminum	Aluminum
Bicycle weight	13 kg	14.1 kg	Not informed	Not informed	Not informed	13.8 kg
Suspension
Suspension configuration	Hardtail	Hardtail	Hardtail	Hardtail	Full suspension	Hardtail
Rear travel	Not informed	Not informed	Not informed	Not informed	100 mm	Not informed
Drivetrain
Front chainrings	1	2	1	3	3	1
Smallest chainring	32	22	30	24	24	32
Largest chainring	32	36	30	42	42	32
Rear sprockets	11	9	Not informed	7	8	10
Smallest sprocket	11	11	9	12	11	11
Largest sprocket	50	36	45	32	32	48
Lowest gear	18.6 in	17.7 in	19.3 in	21.8 in	21.8 in	19.3 in
Highest gear	84.4 in	94.9 in	96.7 in	101.5 in	110.7 in	84.4 in
Cockpit
Shifting	Mechanical	Mechanical	Electronic	Mechanical	Mechanical	Mechanical
Other specifications
Fork spring	Air	Air	Air	Coil	Coil	Air
Suspension	Hardtail	Hardtail	Hardtail	Hardtail	Full suspension	Hardtail
Tire width	2.25″	2.25″	2.4″	2.2″	2.2″	2.25″
Wheel material	Aluminum	Aluminum	Carbon	Aluminum	Aluminum	Aluminum