Merida Silex 4000 Gravel Bike 2025

Carbon gravel bike with Shimano's highly acclaimed gravel specific GRX400 2 x 10 groupset and hydraulic disc brakes
Second generation of the Merida Silex. The original was a ground up design that rather than take a road or cyclocross bike and re-jig the recipe, started with modern MTB inspired geometry; long top and head tubes and a short stem, offering nimble, confidence-inspiring off road handling. It is fair to say that riding wise the original concept was incredibly well received by the press and consumers alike, at launch, it was hailed as the most comfortable and versatile bike Merida had ever made. Over time gravel has developed and riding has evolved, splitting in to racing and adventure. Silex remains all about the road less travelled, the spirit of adventure and camaraderie. The Silex retains all of the key qualities that made the original so successful but becomes more off-road capable with a 1.5 degree slacker head angle and bigger volume tyres. All frames have five sets of bottle bosses, the aluminium frame has rack mounting points offering multiple luggage carrying options for any adventure and has the ability to run internal routed dropper posts and even dynamo systems. A week before its launch, Matej Mohoric rode to victory at the 2023 Gravel World Championships proving it is fairly handy off-road! If we are absolutely honest, the looks of gen 1 were not to everyone's taste, the long headtube made the front end look awkward. Gen 2 runs a revised fork design meaning you can swap to a suspension fork without affecting the geometry and visually the longer fork and shorter headtube look far more appealing. To match the new off road capability all Silex models (with the exception of the 200) are equipped with powerful hydraulic disc brakes and 180mm rotors. Calipers are mounted on the chainstay for better dissipation of braking forces using the flat-mount standard for a neat, flush fit. On the carbon models calipers sit on top of CNCd aluminium Disc Cooler fins reducing operating temperatures by up to 35%; particularly important when running fully loaded.


Highlights:
MTB Inspired gravel geometry
Lightweight carbon frame
Carbon fork with tapered steerer
Shimano GRX400 groupset
Hydraulic disc brakes
12mm bolt through axles

Specification

Frame
CF2 carbon II, gravel geometry for stable but nimble handling. Tapered head tube Inboard disc mounts. Threaded BB, 142 x12mm axle standard, disc cooler technology, 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)

Gears
20

Shifters
Shimano GRX400

Front Derailleur
Shimano GRX400

Rear Derailleur
Shimano GRX400

Bottom Bracket
Attached

Chain
KMC X10

Chainset
Shimano GRX600; 46-30 tooth chainset; Crank length - 170mm (XS/S), 172.5mm (M), 175mm (L/XL)

Cassette
Shimano CS-HG50; 11-36 teeth; 10 speed

Brake Lever
Shimano GRX400

Front Brake
Shimano GRX400; Hydraulic disc brake caliper with Shimano RT10; 180mm rotor

Rear Brake
Shimano GRX400; Hydraulic disc brake caliper with Shimano RT10; 180mm rotor

Grip
Merida Expert

Handlebar
Merida Expert GRII; aluminium; 400mm (XS-S) , 420mm (M) , 440mm (L/XL)

Stem
Merida Team CC III; aluminium; 31.8mm diameter; -6 degree rise - Length - 80mm (all sizes)

Head Set
320.52.631

Saddle
Merida Comp SL; V-mount - made with 25% recycled material

Seat Post
Merida Expert CC; 27.2mm diameter; 15mm layback; Carbon

Wheel Size
700c

Rims
Merida Expert SLII; 23mm inner rim width; 25 mm rim depth; aluminium; Tubeless ready (tubeless tape and valves not included)

Spokes
Black stainless

Front Hub
Shimano HB-TC500; 100 x 12mm; 28 spoke; Centerlock

Rear Hub
Shimano FH-TC500-HL; 142 x 12mm; 28 spoke; Centerlock

Front Tyre
Maxxis Rambler; 700 x 45C; Kevlar bead; TR; EXO

Rear Tyre
Maxxis Rambler; 700 x 45C; Kevlar bead; TR; EXO

Colour
Matt Bronze/Gold/Black

Season
2025