Merida Silex 400 2025 - Gravel Bike
The Silex 400 is built on Merida’s Lite II aluminium frame, blending lightweight durability with mountain bike-inspired geometry for confident off-road handling. A carbon fork, Shimano GRX groupset, and hydraulic disc brakes deliver reliable performance on rough terrain. With ample mounting points, it’s an ideal choice for adventure seekers looking to gear up for multi-day rides.
Key Features:
- Frame: Lite II 6066 aluminium, MTB-inspired geometry, tyre clearance up to 45c
- Fork: Full carbon, tapered steerer, compatible with 45c tyres
- Drivetrain: Shimano GRX400, 10-speed, optimised for gravel
- Brakes: Shimano GRX400 hydraulic discs, 180mm/160mm rotors
- Wheels: Merida Expert SLII, tubeless-ready, aluminium
- Tyres: Maxxis Rambler 700x45c, gravel-specific tread for traction
- Other Standout Feature: Five bottle mounts, rack-compatible for easy load carrying
- Available with 0%APR finance
Designed to push the limits of gravel riding, the Silex 400’s innovative geometry provides nimble handling with a stable feel on rugged trails. Built for serious adventures, the frame’s multiple mounting points accommodate gear for bikepacking, while the GRX drivetrain delivers smooth shifting in all conditions.
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 | Silex CF2 II; Full carbon; tapered steerer, 100 x12mm axle standard; Max tyre size: 700 x 45c (42c with mudguards) |
| Headset | 320.52.631 |
| Stem | Merida Team CC III; aluminium; 31.8mm diameter; -6 degree rise - Length - 80mm (all sizes) |
| Bars | Merida Expert GRII; aluminium; 400mm (XS-S) , 420mm (M) , 440mm (L/XL) |
| Front Brake | Shimano GRX400; Hydraulic disc brake caliper with Shimano RT10; 180mm rotor |
| Rear Brake | Shimano GRX400; hydraulic disc brake caliper with Shimano RT10; 160mm rotor |
| Brake Lever | Shimano GRX400 |
| Front Mech | Shimano GRX400 |
| Rear Mech | Shimano GRX400 |
| Shifters | Shimano GRX400 |
| Speed | 20 |
| Rims | Merida Expert SLII; 23mm inner rim width; 25 mm rim depth; aluminium; Tubeless ready (tubeless tape and valves not included) |
| Front Hub | Shimano HB-TC500; 100 x 12mm; 28 spoke; Centerlock |
| Rear Hub | Shimano FH-TC500-HL; 142 x 12mm; 28 spoke; Centerlock |
| Spokes | Black stainless |
| Front Tyre | Maxxis Rambler; 700 x 45C; Kevlar bead; TR; EXO |
| Rear Tyre | Maxxis Rambler; 700 x 45C; Kevlar bead; TR; EXO |
| Seat Post | Merida Comp CC; 27.2mm diameter; 5 mm layback; Aluminium; |
| Saddle | Merida Comp SL; V-mount - made with 25% recycled material |
| Chainset | Shimano GRX600; 46-30 tooth chainset; Crank length - 170mm (XS/S), 172.5mm (M), 175mm (L/XL) |
| Bottom Bracket | Attached |
| Chain | KMC X10 |
| Cassette | Shimano CS-HG50; 11-36 teeth; 10 speed |
| Pedals | Resin Platform |
Merida Silex 2025 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 2025 Geometry Chart
| Size | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Tyre Size | 28" | 28" | 28" | 28" | 28" |
| Seat Tube Length (alloy frame) | 440 | 470 | 500 | 530 | 560 |
| Top Tube Length (horizontal) | 550 | 565 | 580 | 600 | 620 |
| Chainstay Length | 430 | 430 | 430 | 430 | 430 |
| Head Tube Angle | 69.5° | 69.5° | 69.5° | 69.5° | 69.5° |
| Seat Tube Angle | 74.5° | 74.5° | 74.5° | 74.5° | 74.5° |
| Bottom Bracket Drop | 75 | 75 | 75 | 75 | 75 |
| Head Tube Length | 130 | 150 | 170 | 190 | 210 |
| Fork Length | 415 | 415 | 415 | 415 | 415 |
| Reach | 392 | 402 | 412 | 426 | 441 |
| Stack | 570 | 588 | 607 | 626 | 645 |
| Wheelbase | 1048 | 1065 | 1082 | 1104 | 1126 |
| Standover Height | 744 | 771 | 798 | 825 | 852 |
| Seat Tube Length (carbon frame) | 460 | 490 | 520 | 550 | 580 |
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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