The eSilex 400 is Merida's Silex gravel bike with motor assistance, letting you ride further, take on more and generally grin a lot more while you're at it.
It uses MAHLE's ebikemotion system, with a 40Nm rear hub motor powered by a 250Wh battery hidden inside the down tube. The low system weight, combined with a carbon fork and a sophisticated hydroformed aluminium frame, means the bike still feels lively with the assistance switched off, and there's almost no drag from the motor when it isn't engaged. An iWoc button controls the support levels, and the app lets you fine-tune the ride feel and look back over your rides afterwards.
It's a practical bike too, with mounts for mudguards and a rack plus a neat hidden kickstand mount. Cables run through the frame, entering via a dedicated headset cap to keep the cockpit tidy, and the eSilex can run either 700c or 650b wheels. Shimano GRX 2x10 gearing and GRX hydraulic disc brakes handle mixed terrain with ease.
Features
- Lite II hydroformed 6066 aluminium frame with integrated battery
- MAHLE ebikemotion X30 rear hub motor
- Integrated 250Wh battery with minimal drag when unassisted
- Merida Silex CF2 carbon fork
- Shimano GRX 2x10 drivetrain with 46-30T chainset and 11-36T cassette
- Shimano GRX400 hydraulic disc brakes
- Fast-rolling 700c wheels with Maxxis Rambler 40mm tyres, 650b compatible
- Mounts for mudguards, rack and hidden kickstand
Specifications
DisciplineGravel/
Adventure MaterialAluminium
Wheel Size700c
WarrantyLifetime
Frame - Lite II, hydroformed 6066 triple butted aluminium with integrated battery chamber; mounts for mudguards, rack and kickstand. 9mm QR axle standard, BSA BB standard. Max tyre size 700x45c without mudguards, 700x42c with mudguards, 27.5x47c
Fork - Merida Silex CF2; carbon
Headset - Merida 8158
Stem - Merida Team CC III; material: aluminium; 31.8mm diameter; -6 degree rise; length: 80mm
Handlebar - Merida Expert GRII; material: aluminium; XS-S 400mm, M 420mm, L-XL 440mm
Bar tape - Merida Road Expert
Brake type - Hydraulic disc
Front brake - Shimano GRX400; 2 piston with Shimano RT10; 160mm
Rear brake - Shimano GRX400; 2 piston with Shimano RT26; 160mm
Front tyre - Maxxis Rambler; 700x40c; Kevlar bead; EXO
Rear tyre - Maxxis Rambler; 700x40c; Kevlar bead; EXO
Wheel size - 700c
Rims - Merida Comp SL; 17mm inner rim width; 22mm rim depth; material: aluminium
Spokes - Black stainless; black nipples
Front hub - Shimano HB-TC500; 100x12mm; 28 spoke; Centerlock
Speeds - 20
Front derailleur - Shimano GRX400
Rear derailleur - Shimano GRX400
Chain - KMC e10
Cassette - Shimano CS-HG50; 11-36 teeth; 10 speed
Chainset - Shimano GRX600; 46-30 tooth; cranks: XS-M/L 170mm, L-XL 175mm
Bottom bracket - Shimano RS501 BSA
Pedals - VP VPE-891
Saddle - Merida Comp SL; V-mount
Seatpost - Merida Expert; material: aluminium; 30.9mm diameter; in-line
Motor - Mahle X30 drive unit
Battery - Mahle iX250 battery pack; 250Wh
eSilex 400 2026
- Electric · Gravel / Bikepacking/Adventure
- Alloy frame
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The eSilex 400 is Merida's Silex gravel bike with motor assistance, letting you ride further, take on more and generally grin a lot more while you're at it.
It uses MAHLE's ebikemotion system, with a 40Nm rear hub motor powered by a 250Wh battery hidden inside the down tube. The low system weight, combined with a carbon fork and a sophisticated hydroformed aluminium frame, means the bike still feels lively with the assistance switched off, and there's almost no drag from the motor when it isn't engaged. An iWoc button controls the support levels, and the app lets you fine-tune the ride feel and look back over your rides afterwards.
It's a practical bike too, with mounts for mudguards and a rack plus a neat hidden kickstand mount. Cables run through the frame, entering via a dedicated headset cap to keep the cockpit tidy, and the eSilex can run either 700c or 650b wheels. Shimano GRX 2x10 gearing and GRX hydraulic disc brakes handle mixed terrain with ease.
Features
- Lite II hydroformed 6066 aluminium frame with integrated battery
- MAHLE ebikemotion X30 rear hub motor
- Integrated 250Wh battery with minimal drag when unassisted
- Merida Silex CF2 carbon fork
- Shimano GRX 2x10 drivetrain with 46-30T chainset and 11-36T cassette
- Shimano GRX400 hydraulic disc brakes
- Fast-rolling 700c wheels with Maxxis Rambler 40mm tyres, 650b compatible
- Mounts for mudguards, rack and hidden kickstand
Specifications
DisciplineGravel/
Adventure MaterialAluminium
Wheel Size700c
WarrantyLifetime
Frame - Lite II, hydroformed 6066 triple butted aluminium with integrated battery chamber; mounts for mudguards, rack and kickstand. 9mm QR axle standard, BSA BB standard. Max tyre size 700x45c without mudguards, 700x42c with mudguards, 27.5x47c
Fork - Merida Silex CF2; carbon
Headset - Merida 8158
Stem - Merida Team CC III; material: aluminium; 31.8mm diameter; -6 degree rise; length: 80mm
Handlebar - Merida Expert GRII; material: aluminium; XS-S 400mm, M 420mm, L-XL 440mm
Bar tape - Merida Road Expert
Brake type - Hydraulic disc
Front brake - Shimano GRX400; 2 piston with Shimano RT10; 160mm
Rear brake - Shimano GRX400; 2 piston with Shimano RT26; 160mm
Front tyre - Maxxis Rambler; 700x40c; Kevlar bead; EXO
Rear tyre - Maxxis Rambler; 700x40c; Kevlar bead; EXO
Wheel size - 700c
Rims - Merida Comp SL; 17mm inner rim width; 22mm rim depth; material: aluminium
Spokes - Black stainless; black nipples
Front hub - Shimano HB-TC500; 100x12mm; 28 spoke; Centerlock
Speeds - 20
Front derailleur - Shimano GRX400
Rear derailleur - Shimano GRX400
Chain - KMC e10
Cassette - Shimano CS-HG50; 11-36 teeth; 10 speed
Chainset - Shimano GRX600; 46-30 tooth; cranks: XS-M/L 170mm, L-XL 175mm
Bottom bracket - Shimano RS501 BSA
Pedals - VP VPE-891
Saddle - Merida Comp SL; V-mount
Seatpost - Merida Expert; material: aluminium; 30.9mm diameter; in-line
Motor - Mahle X30 drive unit
Battery - Mahle iX250 battery pack; 250Wh