Merida Silex 400 2026 - Gravel Bike
The Merida Silex 400 blends an aluminium frame, carbon fork and Shimano GRX groupset with modern MTB-inspired geometry, offering confident handling and versatility for gravel adventures and all-road exploration.
Key Features
- Lite II 6066 aluminium frame, MTB-inspired geometry, 45c tyre clearance
- CF2 carbon fork with tapered steerer, 47c max clearance
- Shimano GRX 400 2x10-speed drivetrain
- Shimano GRX 400 hydraulic disc brakes, 180mm rotors
- Merida Expert SL III tubeless-ready wheels
- Maxxis Rambler 700x45c tyres with gravel tread
- Multiple mounts for racks, bottles, mudguards and more
- Available with 0% APR finance
The Silex 400 is built around Merida’s Lite II aluminium frame, designed with triple-butted tubing and smooth welding for strength and a premium finish. Internal cable routing keeps things tidy, while tyre clearance for up to 45c rubber (42c with mudguards) means you can run wide-volume tyres for grip and comfort on rough ground.
The geometry takes inspiration from mountain bikes, with a longer top tube, short stem, and slack angles to deliver stable, confident handling off-road while remaining responsive on the road. A full carbon CF2 fork keeps weight low and steering precise, with clearance for up to 47c tyres if you want even more cushion and grip.
Shimano’s GRX 400 gravel-specific groupset is made for mixed terrain, with a 2x10-speed setup using a 46/30T chainset and 11-36T cassette for a wide range that covers both steep climbs and fast road sections. Hydraulic disc brakes with oversized 180mm rotors offer controlled braking power in all conditions, with calipers mounted neatly on the chainstays to spread braking forces and reduce stress on the frame.
The build includes Merida’s tubeless-ready Expert SL III wheels, strong enough for gravel but efficient on the road, wrapped in 45c Maxxis Rambler tyres. These feature a gravel tread pattern that balances low rolling resistance with dependable off-road grip. Practical touches make the Silex ready for adventure: five bottle cage mounts, rack and mudguard fittings, hidden dropper post compatibility, and even the option to run a dynamo system for self-supported touring.
Comfort is further enhanced by Merida’s Comp CC seatpost and Comp SL saddle, with sustainable materials used in their construction. The Silex platform has proven itself at the highest level too – including a Gravel World Championship win just before its launch – showing that this bike balances adventure capability with real performance.
Whether you’re loading up for a bikepacking trip, tackling bridleways, or linking quiet roads with off-road detours, the Merida Silex 400 is a versatile and confidence-inspiring gravel bike that’s ready to go wherever the ride takes you.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | Lite II - 6066 triple butted hydroformed and smooth welded aluminium with internal cable routing. Tapered head tube, Inboard disc mounts. Threaded BB, 142 x 12mm axle standard, Max tyre size 700 x 45c (42c with mudguards) |
| Fork | Merida Silex II CF2; Tapered; material: carbon; 700x47C max. tyre size |
| Headset | Acros ICR Merida External neck w/diecast splitring |
| Stem | Merida Team CC III; material: aluminium; 31.8 mm diameter; -6 degree rise; Length: 80mm all sizes |
| Bars | Merida Expert GRII; material: aluminium; (XXS-S) - 400mm wide, M - 420mm wide, (L-XL) - 440mm wide |
| Front Brake | Shimano GRX400; Hydraulic disc with Shimano RT54; 180mm |
| Rear Brake | Shimano GRX400; Hydraulic disc with Shimano RT54; 180mm |
| Brake Lever | Shimano GRX 410 |
| Front Mech | Shimano GRX400 |
| Rear Mech | Shimano GRX400 |
| Shifters | Front: Shimano GRX 400; disc, Rear: Shimano GRX 400; disc |
| Speed | 20 |
| Rims | Merida Expert SL III; 23mm inner rim width; material: aluminium; Tubeless ready (tubeless tape and valves not included) |
| Front Hub | Shimano HB-TC500; 100x12mm; 28 Spoke; Centerlock |
| Rear Hub | Shimano FH-TC500-HM; 12-142mm; 28 Spoke; Centerlock |
| Spokes | Black stainless |
| Front Tyre | Maxxis Rambler; 700x45C; kevlar bead; TR; EXO |
| Rear Tyre | Maxxis Rambler; 700x45C; kevlar bead; TR; EXO |
| Seat Post | Merida Comp CC; 27.2mm diameter; in-line; material: aluminium |
| Saddle | Merida Comp SL; 25% recycled material; V-mount |
| Chainset | Shimano GRX600; 46-30 tooth chainset; Crank length: (XXS-XS) - 165mm, (S-M) - 170mm, (L-XL) - 172.5mm |
| Bottom Bracket | Attached |
| Chain | KMC X10 |
| Cassette | Shimano CS-HG50; 11-36 teeth; 10 speed |
| Pedals | Not Included |
Merida Silex 2026 Size Chart
| Size | Rider Height (Inch) | Rider Height (cm) |
|---|---|---|
| XS | 5'3" – 5'5" | 162 – 167 |
| S | 5'4" – 5'9" | 165 – 177 |
| M | 5'7" – 5'11" | 173 – 185 |
| L | 5'10" – 6'2" | 181 – 192 |
| XL | 6'1" – 6'5" | 188 – 200 |
What size frame do I need if I am between sizes? - read here
Merida Silex 2026 Geometry Chart
| Size | XXS | XS | S | M | L | XL |
|---|---|---|---|---|---|---|
| Stack | 549 | 570 | 588 | 607 | 626 | 645 |
| Reach | 378 | 392 | 402 | 412 | 426 | 441 |
| Head Tube Length | 110 | 130 | 150 | 170 | 190 | 210 |
| Head Tube Angle | 69.5° | 69.5° | 69.5° | 69.5° | 69.5° | 69.5° |
| Bottom Bracket Drop | 75 | 75 | 75 | 75 | 75 | 75 |
| Fork Length | 415 | 415 | 415 | 415 | 415 | 415 |
| Chainstay Length | 430 | 430 | 430 | 430 | 430 | 430 |
| Wheelbase | 1031 | 1048 | 1065 | 1082 | 1104 | 1126 |
| Top Tube Length (horizontal) | 530 | 550 | 565 | 580 | 600 | 620 |
| Standover Height | 707 | 734 | 771 | 798 | 825 | 852 |
| Seat Tube Length | 410 | 440 | 470 | 500 | 530 | 560 |
| Seat Tube Angle | 74.5° | 74.5° | 74.5° | 74.5° | 74.5° | 74.5° |
| Tyre Size | 28″ | 28″ | 28″ | 28″ | 28″ | 28″ |
All measurements are in mm unless otherwise stated.
The above table shows the standard geometry for the bicycle as shipped, other geometry configurations may be available with certain bikes. Please contact us via Live Chat to find out more.
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Merida Silex 400 2026 - Gravel Bike
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