BIG.NINE 15
Merida
Crosscountry
BIG.NINE 15 is an alloy cross-country mountain bike (2025), by Merida, part of the Bignine family. It is a strong match for a wide range of riders thanks to its fit flexibility, with a balanced riding position, and is best for smoother trails and efficient rolling. Its profile is strongest in areas like good fit flexibility for dialing in rider position, strong speed potential on smoother terrain, and a balanced ride feel between comfort and directness. Compare this bike on MatchBikes.com to similar cross-country models.
5.1
Rating

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Score Summary
Performance
4.3
Fit
6.9
Performance
Built for speed and efficiency
Speed
6.0
Low
Climbing Efficiency
2.6
Hefty but Manageable
Suspension
5.0
Confident trail control
Fit
Dialed-in Fit & Comfort
Riding Position
5.9
Balanced
Fit Flexibility
8.1
Adjustable
Ride Comfort
6.4
Balanced
Value
Surface Range
Flow TrailsSpecifications
General
Brand
Merida
Model
BIG.NINE 15
Year
2025
Category
Mountain
Sub Category
Crosscountry
Groupset
Tourney
Frame
Frame
BIG.NINE TFS IV, material: aluminum, 29x2.25" max. wheelsize, 135x9mm axle standard, BSA bottom bracket standard
Suspension Fork
SR Suntour XCT30, Coil, 100mm suspension travel, 29x2.25" max. wheelsize
Suspension Type
Hardtail
Drivetrain
Shift Levers
Shimano FH-TY505-3L / Shimano FH-TY505-7R
Rear Derailleur
Shimano RD-M300-7
Front Derailleur
Shimano FD-TY700
Cassette
Shimano CS-HG200-7, 12-32 teeth, 7 speed
Crank
Shimano TY301, 42-34-24 teeth, MAT Aluminium, 170 mm-S, 175 mm-M up
Bottom Bracket
FSA TH-7420ST, 68-124
Chain
Sunrace CNM84
Wheels
Front Hub
Shimano TX505 / Shimano TY505-7, 100x9mm width front hub, 32 spoke holes, Centerlock, 135x9mm width rear hub, 32 spoke holes, Centerlock
Rear Hub
Shimano TX505 / Shimano TY505-7, 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" |






















































