SILEX 4000


This high-value carbon framed bike is ready for any adventure, with a durable Shimano GRX drivetrain that offers climb-anything ability plus our proven mountain bike-inspired handling for off-road confidence.
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Ready for adventures of any size. The SILEX 4000 is the entry to our carbon fibre framed lineup, pairing our lightweight frame and fork with high-value equipment such as the utterly durable 10-speed Shimano GRX drivetrain with a double chainset for climb-anything ability. Tough, tubeless-ready Maxxis Rambler tyres plus our mountain bike-inspired geometry provide a predictable and planted connection to the ground while quality MERIDA finishing kit delivers performance without needing any fanfare.

The SILEX turns any ride into an adventure, whether you’re on a multi-day gravel bikepacking mission or just taking the fun route to work. The latest version builds on the test-winning pedigree of the original SILEX but adds even more off-road capability, thanks to a slacker head angle and boosted tyre clearance of up to 700x45 mm or even 42 mm with fenders. We've combined that confident mountain bike-inspired handling with all-surface versatility so that it is utterly stable when loaded up with luggage but still fast and fun when you put the hammer down. With carbon and aluminium frame options, there's a SILEX to suit every budget, but all of them share the multiple mounting points, fender racks and other features that lend themselves so well to this drop-bar do-everything machine. We’ve added our sleek WIRE PORT cable routing for improved looks – and fewer cables to catch on with a handlebar bag – and the carbon fibre fork used on all models now has more cargo mounts plus internal routing for a dynamo hub. With the ability to use 1x or 2x drivetrains, you can pick your gearing to suit the task at hand or your own personal preference, opening up a world of opportunity for you and your SILEX.

  • Full carbon frame with dropped chainstay for 700x45 mm clearance
  • Multiple mounting points for cages, bags and fenders
  • WIRE PORT internal cable routing for clean looks and scuff free bag fitting
  • Carbon fork with cargo mounting points and routing for dynamo hub
  • Relaxed head angle and MTB-style geometry for off-road stability
  • Shimano GRX 2x10-speed gravel groupset

Awards & Media

  • material: carbon
  • 700x47C max. wheelsize
  • 100x12/142x12 mm axle standard
  • BSA bottom bracket standard
frame size XS, S, M, L, XL
  • Tapered
  • material: carbon
  • 700x47C max. wheelsize
brake lever Shimano GRX400
headset MERIDA 8158
  • material: aluminium
  • 400 mm (XS-S) , 420 mm (M) , 440 mm (L/XL)
  • material: aluminium
  • 31.8 mm diameter
  • -6° stem angle
  • 80 mm all sizes
grip MERIDA ROAD Expert
derailleur (f) Shimano GRX400
derailleur (r) Shimano GRX400
shifters Shimano GRX400
  • 27.2 mm diameter
  • 15 mm setback
  • material: Carbon
seat clamp MERIDA EXPERT
chain KMC X10
  • 46-30 teeth
  • 170 mm-XS/S, 172,5 mm-M, 175 mm-L/XL
  • 11-36 teeth
  • 10 speed
  • 100x12 mm width front hub
  • 32 spoke holes
  • centerlock
  • 142x12 mm width rear hub
  • 32 spoke holes
  • centerlock
  • 23 mm inner width
  • 25 mm height
  • material: aluminium
  • Tubeless ready (tubeless
  • 700x45C
  • fold
  • TR
  • EXO
  • 700x45C
  • fold
  • TR
  • EXO
  • including removable lever
  • 6/4 mm allen key
spokes Black stainless
  • weighed at frame size M
  • Weight may vary depending on bike size, finish or possible specification changes due to supply chain issues.
  • Total weight of bike, rider and luggage
Bike Frame Geometry Image
Frame Size XS S M L XL
Tyre Sizes 28" 28" 28" 28" 28"
ST seat tube [mm] 440 470 500 530 560
TT top tube [mm] 550 565 580 600 620
CS chain stay length [mm] 430 430 430 430 430
HTA head tube angle [°] 69.5 69.5 69.5 69.5 69.5
STA seat tube angle [°] 74.5 74.5 74.5 74.5 74.5
BD bottom bracket drop [mm] 75 75 75 75 75
HT head tube [mm] 130 150 170 190 210
FL fork length [mm] 415 415 415 415 415
R reach [mm] 392 402 412 426 441
S stack [mm] 570 588 607 626 645
WB wheel base [mm] 1048 1065 1082 1104 1126
SH stand over height [mm] 744 771 798 825 852
No. Item-No. Name Info Pieces Torque NM
1 A2054000107 EXPANDER for fork steerer ID 23.6mm 1 6~8
2 A2191000242 HEAD SET Acros AIX-631 320.52.631 (without fork cone, for carbon fork) 1
2 HEAD SET Acros AIX-634 320.52.634 (with fork cone, for suspension fork) 1
3 A2029000062 TUBE woven; L170mm; for size XL 1
3 A2029000061 TUBE woven; L150mm; for size L 1
3 A2029000060 TUBE woven; L125mm; for size M 1
3 A2029000059 TUBE woven; L105mm; for size S 1
3 A2029000058 TUBE woven; L90mm; for size XS 1
4 A2298000059 SCREW M5*P0.8 L15mm 12 4~5
5 A2143000117 BLIND PLUG for M5 threaded hole 8
6 A2292000028 WASHER OD9mm ID5.2mm H3mm 6
7 A2347000054 COVER seatpost clamp cover 1
8 A2247000120 CLAMP for seat post 1
9 A2298000392 SCREW M5*P0.8 L12mm 3 4~5
10 A2164000091 DISC COOLER front; for FM160 to FM180 1
11 A2298000377 SCREW M4*P0.7 L5mm 2 3~4
12 A2164000089 MOUNT fender to frame and fork 4
13 A2002000120 THRU AXLE Front hollow; L=120mm M12x1.5 TL=12mm 1
14 A2029000037 TUBE foam; ID6mm; 450mm 3
15 A2124000083 COVER for fidlock down tube bottlemount 1
16 A2030000026 MOUNT SSB 1
17 A2298000360 SCREW M4*P0.7 L6mm 2 3~4
18 A2143000159 COVER for front derailleur mount 1
19 A2294000202 MOUNT adapter for mounting a front derailleur 1
20 A2136000118 MOUNT for mounting a front derailleur 1
21 A2298000198 SCREW M5*P0.8 L16mm 2 4~5
22 A2143000163 CABLE GUIDE FD Di2 cable 1
23 A2143000130 BLIND PLUG FD cable 1
24 A2322000049 PROTECTOR chain suck plate 1
25 A2311000104 RD-HANGER DH-068; ROAD-RD 1
26 A2311000150 RD-HANGER DH-076; MTB-RD 1
27 A2311000103 RD-HANGER DH-067; SHIMANO direct mount 1
28 A2258000099 CABLE GUIDE brake hose out of chain stay 1
28 A2258000228 CABLE GUIDE brake hose and light out of chain stay 1
29 A2300000129 SCREW M3*P0.5 L10mm 1 2~3
30 A2143000131 BLIND PLUG RD cable 1
31 A2143000160 CABLE GUIDE RD Di2 cable 1
32 A2143000082 CABLE GUIDE RD cable 1
33 A2002000119 THRU AXLE EXPERT SL; L=162.5mm M12x1.5 TL=12mm 1
34 A2164000027 DISC COOLER rear; for FM160 to FM180 1
35 A2298000268 SCREW M5*P0.8 L23mm 2 4~5
36 A2298000356 SCREW M4*P0.7 L8mm 2 3~4
37 A2158000090 PROTECTOR for chain stay 1
38 A2298000210 SCREW M5*P0.8 L15mm 6 4~5

To reduce production and delivery times, we are sometimes forced to make last-minute specification changes. Please be aware that those changes might not be reflected on these product pages and images.



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Steering precision is vital to safe and confident handling, and the X-TAPER HEADTUBE allows us to significantly boost this precision. A larger headset diameter at the bottom paired with a smaller one at the top helps to deal with the strains modern riding and equipment can put on the headtube, all without adding unnecessary weight. It allows tapered forks to be fitted with ease and delivers precise and confidence-inspiring steering.

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On the majority of our frames, we run the gear and brake cables and hoses through the frame. The cables enter and exit the frame through smooth sockets, or we use one of our other systems like SMART ENTRY or WIRE PORT to be routed through. Running the cables inside the frame protects them from the elements, gives a clean and neat look and can offer aerodynamic advantages.

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Shimano's Di2 electronic shifting system offers fast, smooth and reliable shifting. In particular, in the road world, it has proven itself as the primary choice when top performance is at the top of the agenda. With that in mind, we have a broad selection of performance road frames that are Di2 READY and can accommodate the electrical cable, battery and other little tweaks that the system requires.

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NANO MATRIX CARBON is a special kind of carbon fibre where we add extremely tiny, nano-scale particles to the resin that binds the individual carbon fibres together. These then work on a molecular level to protect them from damage. It’s so effective that it can actually increase the finished carbon fibre’s impact resistance by up to 40%, allowing us to build stronger and lighter composite frames that result in a faster and tougher bike.

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This is a method we use to manufacture our carbon fibre frames. First, the carbon fibre that makes up the frame is laid around special formers. We then use a bladder to compress the layers against the outside of the frame mould, giving a smooth and wrinkle-free internal finish, removing any voids in between the layers of carbon that can cause potential weak points, resulting in a stronger, lighter frame.

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Being able to turn your bike into an all-weather commuter that has mudguards and other fittings can be a real plus, in particular when riding on wet and perhaps muddy roads and tracks on a regular basis. To make fitting easy, some of our bikes are F-MOUNT equipped. These integrated fittings mounts make adding mudguards fast and simple. Please note that some bikes require model-specific mudguards.

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Used on our carbon fibre road and gravel bikes, DISC COOLER is a finned piece of forged aluminium that sits between the brake calliper and frame. The aluminium piece helps to draw heat from the braking system and radiates it away quickly. It reduces the temperatures by up to 35% and helps to keep your brakes working at their best for improved control and performance on long descents and under heavy braking.

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When every second counts, the smallest of details can make the difference between winning and losing, so we look at every aspect of our frames to make them as sleek as possible. By using a seat post clamping mechanism that secures the post with a wedge inside the frame itself, we minimise the turbulence and potential drag while keeping post height adjustment simple, giving a frame that is more aerodynamic and also better looking.

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A special, removable piece fitted to the seat stay bridge that can be attached to the bike to allow full mudguards to be fitted easily for protection from water and dirt, but also completely removed to increase tyre clearance and give a clean, sleek look to the bike when full guards are no longer needed. This gives the bike the benefit of full mudguards when required but no unsightly mounts when they are not.

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MERIDA designed headsets that enable all control cables from the handlebar to enter the frame through the headset cover, creating a clean and uncluttered look, allowing for a lighter, stronger and more aerodynamic frame structure than with conventional cable ports. Depending on the model, the cables are run completely internally (including the bar and stem) or semi-integrated, where the cables enter the frame underneath the stem.

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