Merida BIG Nine 20

2025 MountainCross-country Manufacturer page

Price: Not published

Prices shown first for United States
United Kingdom: £700 Last known price
Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 8 32t / 11–45t
Gear range: 409%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

19 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, 29x2.25" max. wheelsize, 135x9mm axle standard, BSA bottom bracket standard Not identified

Suspension

1 part

Fork
- SR Suntour XCT30

Drivetrain

6 parts

Bottom bracket
- Shimano BB-UN101
BB-UN101
Cassette
- Shimano CS-HG400-8 8 speeds
CS-HG400
Chain
- KMC Z8.3 8 speeds
Crankset
- Shimano Essa FC-U2001 8 speeds
FC-U2001
Rear derailleur
- Shimano Essa RD-U2000 8 speeds
RD-U2000
Shifters
- Shimano Essa
SL-315-8R

Brakes

2 parts

Wheels and tires

4 parts

Front hub
- Shimano HB-TX505
HB-TX505
Rear hub
- Shimano FH-TX505 11 speeds
FH-TX505
Rims
- Merida
Tires
- Merida

Cockpit and contact points

6 parts

Sizes and geometry

4 sizes Open in the geometry plotter

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

Size LG

Table

Reach 414mm

Stack 642mm

Wheelbase 1110mm

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 Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	398	414	429	445
Stackmm	628	642	656	670
Top tube lengthmm	590	610	630	650
Seat tube lengthmm	430	470	510	560
Head tube lengthmm	115	130	145	160
Head tube angle	70°	70°	70°	70°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1090	1110	1131	1152
Front centermm	657	677	698	719
Bottom bracket dropmm	60	60	60	60
Bottom bracket heightmm	314	314	314	314
Standover heightmm	727	763	800	843
Fork rakemm	46	45	46	46
Trailmm	87	88	87	87
Stack/reach ratio	1.58	1.55	1.53	1.51

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

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 45
Lowest gear: 20.6 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: Coil
Tire width: 2.2″
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: 7.9 km/h
Highest gear: 32.3 km/h

Total gear range 409%

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: 20.6–84.4 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 20	Merida BIG Nine 10K	Merida BIG Nine 20 SE	Merida BIG Nine 3000	Merida BIG Nine 80	Merida BIG Nine TR 5000
Frame
Frame material	Aluminum	Carbon	Aluminum	Carbon	Aluminum	Carbon
Suspension
Suspension configuration	Hardtail	Hardtail	Full suspension	Hardtail	Hardtail	Hardtail
Front travel	100 mm	100 mm	100 mm	100 mm	100 mm	120 mm
Rear travel	Not informed	Not informed	100 mm	Not informed	Not informed	Not informed
Drivetrain
Front chainrings	1	1	2	1	1	1
Smallest chainring	32	30	22	32	32	32
Largest chainring	32	30	36	32	32	32
Rear sprockets	8	Not informed	8	12	9	12
Smallest sprocket	11	9	11	10	11	10
Largest sprocket	45	45	32	51	46	51
Lowest gear	20.6 in	19.3 in	19.9 in	18.2 in	20.2 in	18.2 in
Highest gear	84.4 in	96.7 in	94.9 in	92.8 in	84.4 in	92.8 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost
Shifting	Mechanical	Electronic	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Fork spring	Coil	Air	Coil	Air	Coil	Air
Suspension	Hardtail	Hardtail	Full suspension	Hardtail	Hardtail	Hardtail
Tire width	2.2″	2.4″	2.2″	2.25″	2.2″	2.4″
Wheel material	Aluminum	Carbon	Aluminum	Aluminum	Aluminum	Aluminum