Merida has more than 50 years of experience building tough aluminium hardtails, and the Big Seven 20 puts that experience into a smaller-framed 27.5" trail bike that suits shorter riders and younger teens stepping up to proper off-road riding.
The latest generation follows modern mountain bike trends with a longer reach and shorter stem, a steeper seat angle and a slacker head angle, giving more confidence off-road without making it awkward for everyday riding. The TFS aluminium frame has full internal cable routing, a tapered head tube for future fork upgrades, inboard disc brake mounts that protect the brake and maximise stopping power, dropper post compatibility and room for 2.4" tyres.
The Big Seven 20 steps up to a 120mm SR Suntour fork with lockout, Shimano MT200 hydraulic disc brakes and a simple Shimano 1x8 drivetrain with a wide 11-45T cassette, so there's less to think about and plenty of range for the climbs.
Features
- Updated TFS V aluminium frame with clearance for 2.4" tyres
- Trail-ready geometry for confident off-road handling
- 120mm SR Suntour XCM32 coil fork with lockout
- Shimano MT200 hydraulic disc brakes with 160mm rotors
- Shimano Essa 1x8 drivetrain with 11-45T cassette
- 27.5" wheels with Shimano hubs and Kenda Booster 2.4" tyres
- Size-tuned Merida finishing kit, mudguard and kickstand mounts
Sizing
- XXS: under 140cm
- XS: 140cm - 156cm
- S: 157cm - 173cm
Specifications
DisciplineTrail
MaterialAluminium
Front Travel120mm
Rear TravelHardtail
Wheel Size27.5"
WarrantyLifetime
Frame - TFS V, 6061 aluminium, double butted and technoformed. Tapered head tube. Chainstay mounted disc brake. Internal cable routing. Mudguard and kickstand mounts. BSA threaded BB. 135x9mm axle. Max tyre size 27.5x2.4"
Fork - SR Suntour XCM32 NLO; Coil; 120mm travel; lockout; 29x2.4" max tyre size
Headset - FSA NO.55R/57SC/57B
Stem - Merida Comp CC; material: aluminium; 31.8mm diameter; 7 degree rise
Handlebar - Merida CC; material: aluminium; 15mm rise; (XXS-XS) 700mm wide, S 720mm wide
Grips - Merida EC
Brake type - Hydraulic disc
Front brake - Shimano MT200; hydraulic brake with Shimano RT10; 160mm
Rear brake - Shimano MT200; hydraulic brake with Shimano RT10; 160mm
Front tyre - Kenda Booster; 27.5x2.4"
Rear tyre - Kenda Booster; 27.5x2.4"
Wheel size - 27.5"
Rims - Merida Comp CC; 20mm inner rim width; material: aluminium
Spokes - Black steel
Front hub - Shimano TX505; 100x9mm; 32 spoke; Centerlock
Rear hub - Shimano TX505; 135x9mm; 32 spoke; Centerlock
Speeds - 8
Rear derailleur - Shimano Essa RD-U2000-8; GS
Shift levers - Rear: Shimano Essa SL-315-8R
Chain - KMC Z8.3
Cassette - Shimano CS-HG300-8; 11-45 teeth; 8 speed
Chainset - Prowheel Epro-MD26S; 32 tooth; material: aluminium; crank length: 165mm
Bottom bracket - Shimano UN101 LL123
Pedals - VP VPE 536
Saddle - Merida Sport
Seatpost - Merida Comp CC; material: aluminium; 30.9mm diameter; in-line
Big Seven 20 2026
- Trail
- Hardtail · 120mm fork
- Alloy frame
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90 Day Returns
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Pro builtBuilt and safety-checked by our mechanics before it leaves us
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Free UK mainland courier deliveryNorthern Ireland: £60
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Collect in CanterburyPick up and get set up at our store
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Talk to a riderChat with our team
Merida has more than 50 years of experience building tough aluminium hardtails, and the Big Seven 20 puts that experience into a smaller-framed 27.5" trail bike that suits shorter riders and younger teens stepping up to proper off-road riding.
The latest generation follows modern mountain bike trends with a longer reach and shorter stem, a steeper seat angle and a slacker head angle, giving more confidence off-road without making it awkward for everyday riding. The TFS aluminium frame has full internal cable routing, a tapered head tube for future fork upgrades, inboard disc brake mounts that protect the brake and maximise stopping power, dropper post compatibility and room for 2.4" tyres.
The Big Seven 20 steps up to a 120mm SR Suntour fork with lockout, Shimano MT200 hydraulic disc brakes and a simple Shimano 1x8 drivetrain with a wide 11-45T cassette, so there's less to think about and plenty of range for the climbs.
Features
- Updated TFS V aluminium frame with clearance for 2.4" tyres
- Trail-ready geometry for confident off-road handling
- 120mm SR Suntour XCM32 coil fork with lockout
- Shimano MT200 hydraulic disc brakes with 160mm rotors
- Shimano Essa 1x8 drivetrain with 11-45T cassette
- 27.5" wheels with Shimano hubs and Kenda Booster 2.4" tyres
- Size-tuned Merida finishing kit, mudguard and kickstand mounts
Sizing
- XXS: under 140cm
- XS: 140cm - 156cm
- S: 157cm - 173cm
Specifications
DisciplineTrail
MaterialAluminium
Front Travel120mm
Rear TravelHardtail
Wheel Size27.5"
WarrantyLifetime
Frame - TFS V, 6061 aluminium, double butted and technoformed. Tapered head tube. Chainstay mounted disc brake. Internal cable routing. Mudguard and kickstand mounts. BSA threaded BB. 135x9mm axle. Max tyre size 27.5x2.4"
Fork - SR Suntour XCM32 NLO; Coil; 120mm travel; lockout; 29x2.4" max tyre size
Headset - FSA NO.55R/57SC/57B
Stem - Merida Comp CC; material: aluminium; 31.8mm diameter; 7 degree rise
Handlebar - Merida CC; material: aluminium; 15mm rise; (XXS-XS) 700mm wide, S 720mm wide
Grips - Merida EC
Brake type - Hydraulic disc
Front brake - Shimano MT200; hydraulic brake with Shimano RT10; 160mm
Rear brake - Shimano MT200; hydraulic brake with Shimano RT10; 160mm
Front tyre - Kenda Booster; 27.5x2.4"
Rear tyre - Kenda Booster; 27.5x2.4"
Wheel size - 27.5"
Rims - Merida Comp CC; 20mm inner rim width; material: aluminium
Spokes - Black steel
Front hub - Shimano TX505; 100x9mm; 32 spoke; Centerlock
Rear hub - Shimano TX505; 135x9mm; 32 spoke; Centerlock
Speeds - 8
Rear derailleur - Shimano Essa RD-U2000-8; GS
Shift levers - Rear: Shimano Essa SL-315-8R
Chain - KMC Z8.3
Cassette - Shimano CS-HG300-8; 11-45 teeth; 8 speed
Chainset - Prowheel Epro-MD26S; 32 tooth; material: aluminium; crank length: 165mm
Bottom bracket - Shimano UN101 LL123
Pedals - VP VPE 536
Saddle - Merida Sport
Seatpost - Merida Comp CC; material: aluminium; 30.9mm diameter; in-line
Returns Information
Reviews
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