BIG.NINE 20 SE
Merida
Crosscountry
BIG.NINE 20 SE is an alloy cross-country mountain bike (2025), by Merida, in the Bignine series. This bike is aimed at a wide range of riders thanks to its fit flexibility, with a setup that gives you a balanced riding position, and is best for smoother trails and efficient rolling. Metric-wise, it stands out for good fit flexibility for dialing in rider position, a comfort-leaning ride feel over longer rides, and strong speed potential on smoother terrain. If this looks close to what you want, compare this bike on MatchBikes.com against similar models.
6.4
Rating

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Score Summary
Performance
6.0
Fit
7.3
Performance
Built for speed and efficiency
Speed
6.0
Low
Climbing Efficiency
6.4
All-Rounder
Suspension
5.0
Confident trail control
Fit
Dialed-in Fit & Comfort
Riding Position
5.9
Balanced
Fit Flexibility
8.1
Adjustable
Ride Comfort
7.3
Comfortable
Value
Surface Range
Flow TrailsSpecifications
General
Brand
Merida
Model
BIG.NINE 20 SE
Year
2025
Category
Mountain
Sub Category
Crosscountry
Groupset
Altus
Frame
Frame
BIG.NINE TFS IV, 100mm suspension travel, material: aluminum, 29x2.25" max. wheelsize, 135x9mm axle standard, BSA bottom bracket standard
Suspension Fork
SR Suntour XCT30 HLO, Coil, 100mm suspension travel, lockout, max. 29x2,25" wheelsize
Suspension Type
Full
Drivetrain
Shift Levers
Shimano ST-EF505
Rear Derailleur
Shimano RD-M370, SGS
Front Derailleur
Shimano FD-M315-TS
Cassette
Sunrace CSM558AU, 11-32 teeth, 8 speed
Crank
Shimano FC-M315-2, 36-22 teeth, MAT Aluminium, 170 mm-S, 175 mm-M up
Bottom Bracket
Shimano BB-UN101 73-123
Chain
KMC Z8.3
Wheels
Front Hub
Shimano TX505, 100x9mm width front hub, 32 spoke holes, Centerlock, 135x9mm width rear hub, 32 spoke holes, Centerlock
Rear Hub
Shimano TX505, 100x9mm width front hub, 32 spoke holes, Centerlock, 135x9mm width rear hub, 32 spoke holes, Centerlock
Rims
MERIDA CC, 17mm inner width, material: aluminium
Spokes
Black steel
Tires
MERIDA K1080, 29x2.2", wire
Brakes
Brake Type
Hydraulic Disc
Brake Description
Shimano ST-EF505, hydraulic brake
Cockpit
Handlebar
MERIDA CC, material: aluminium, 690mm width, 15mm rise
Seat
Saddle
MERIDA Sport comfort
Seatpost
MERIDA CC, 30.9mm diameter, 15mm setback, material: aluminium
Geometry
| Measurement | SM | MD | LG | XL | XXL |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.607 mm | 1.578 mm | 1.551 mm | 1.529 mm | 1.506 mm |
| Bottom Bracket Height | 314 mm | 314 mm | 314 mm | 314 mm | 314 mm |
| Front Center | 636 mm | 657 mm | 677 mm | 698 mm | 719 mm |
| Rake | 46 mm | 46 mm | 45 mm | 46 mm | 46 mm |
| Trail | 87 mm | 87 mm | 88 mm | 87 mm | 87 mm |
| Stack | 614 mm | 628 mm | 642 mm | 656 mm | 670 mm |
| Reach | 382 mm | 398 mm | 414 mm | 429 mm | 445 mm |
| Top Tube Length | 570 mm | 590 mm | 610 mm | 630 mm | 650 |
| Seat Tube Angle | 73 ° | 73 ° | 73 ° | 73 ° | 73 ° |
| Seat Tube Length | 370 mm | 430 mm | 470 mm | 510 mm | 560 mm |
| Head Tube Angle | 70 ° | 70 ° | 70 ° | 70 ° | 70 ° |
| Head Tube Length | 100 mm | 115 mm | 130 mm | 145 mm | 160 mm |
| Chainstay Length | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
| Wheelbase | 1069 mm | 1090 mm | 1110 mm | 1131 mm | 1152 mm |
| Bottom Bracket Drop | 60 mm | 60 mm | 60 mm | 60 mm | 60 mm |
| Standover Height | 679 mm | 727 mm | 763 mm | 800 mm | 843 mm |
| Wheels | 29" | 29" | 29" | 29" | 29" |






















































