Everyday versatility paired with an adventure-ready attitude. Our quality aluminium frame and carbon fork pair off-road ready handling with all-road versatility, while the robust Shimano groupset has you covered.
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  • *All specifications listed are subject to change without notice. *Recommended Retail Prices are subject to change without notice.

  • Versatility never goes out of style. The SILEX 400 is an adventure-ready gravel bike that’s equally at home doing a rough commute or winter training laps, thanks to a durable aluminium frame, lightweight carbon fork and huge tyre clearance of 700 x 45 mm – or even 42 mm tyres with fenders. Our MTB-inspired geometry gives you huge confidence off-road, the huge number of mounts mean you’ll be able to carry what you need easily, and the durable Shimano 2x10-speed GRX groupset and brakes will make short work of the ups and downs.

    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.

    • Aluminium 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
    • Wide-range gravel-specific Shimano GRX 2x10-speed groupset

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    • material: aluminium
    • 700x45C max. wheelsize
    • 100x12/142x12 mm axle standard
    • BSA bottom bracket standard
    frame size XS, S, M, L, XL
    • Tapered
    • material: carbon
    • 700x47C max. wheelsize
    derailleur (f) Shimano GRX400
    derailleur (r) Shimano GRX400
    • 180 mm
    • 160 mm
    shifter front Shimano GRX400
    shifter rear Shimano GRX400
    brake lever Shimano GRX400
    chain KMC X10
    • 46-30 teeth
    • 170 mm-XS/S, 172,5 mm-M, 175 mm-L/XL
    • 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
    • 11-36 teeth
    • 10 speed
    • 700x45C
    • fold
    • TR
    • EXO
    • 700x45C
    • fold
    • TR
    • EXO
    spokes Black stainless
    • material: aluminium
    • 31.8 mm diameter
    • -6° stem angle
    • 80 mm all sizes
    • material: aluminium
    • 400 mm (XS-S) , 420 mm (M) , 440 mm (L/XL)
    headset MERIDA 8158
    • material: aluminium
    • 27.2 mm diameter
    • 5 mm setback
    • 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] 460 490 520 550 580
    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 A2054000198 EXPANDER for fork steerer ID 23.6mm8 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 11 3~5
    5 A2143000117 BLIND PLUG for M5 threaded hole 10
    6 A2292000028 WASHER OD9mm ID5.2mm H3mm 6
    7 A2240000010 CABLE GUIDE front derailleur cable below bottom bracket 1
    8 A2298000093 SCREW M4*P0.7 L6mm 2 3~4
    9 A2298000392 SCREW M5*P0.8 L12mm 1 4~5
    10 A2164000091 DISC COOLER front; for FM160 to FM180 1
    11 A2298000356 SCREW M4*P0.7 L8mm 4 3~4
    12 A2164000089 MOUNT fender to frame and fork 4
    13 A2002000120 THRU AXLE EXPERT SL; L=120mm M12x1.5 TL=12mm 1
    14 A2029000037 TUBE foam; ID6mm; 450mm 3
    15 A2136000118 MOUNT for mounting a front derailleur 1
    16 A2298000198 SCREW M5*P0.8 L16mm 2 4~5
    17 A2311000104 RD-HANGER DH-068 for ROAD-RD 1
    18 A2311000150 RD-HANGER DH-076 for MTB-RD 1
    19 A2311000103 RD-HANGER DH-067 for SHIMANO direct mount 1
    20 A2258000099 CABLE PLUG brake hose out of chain stay 1
    21 A2300000129 SCREW M3*P0.5 L10mm 1 2~3
    22 A2002000119 THRU AXLE EXPERT SL; L=162.5mm M12x1.5 TL=12mm 1
    23 A2298000240 SCREW M6*P1.0 L16mm 1 6~8
    24 A2161000211 CABLE GUIDE for headtube 1
    25 A2352000098 PROTECTOR for chain stay 1
    26 A2350001663 FORK Silex II 1
    27 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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    When creating high-end aluminium frames, we use our proven PROLITE 66 (6066) aluminium, as it is incredibly light and durable. In addition, it works exceptionally well with our hydroforming technology, allowing us to create complex shapes, featuring triple butted wall thicknesses, an almost carbon-like appearance and the best possible stiffness-to-weight ratio. While lesser alloys might be cheaper, it is the ideal choice for high-performance bicycle frames.

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    ‘C-Mount’ equipped bikes have the fixing points for a rear rack already integrated (some bikes require model specific rear rack), making fitting fast, simple and reliable. 

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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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    This is a process we use to give a nice flat finish to our welds instead of the scaled, 'stack of coins' effect TIG welded joints often have. The welder uses the welding torch to go over the joint twice, helping to smooth out the filler material. It takes a lot of skill to do this, but it delivers strong and smart-looking frames that have the appearance of a carbon fibre frame at first look.

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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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    DOWN TUBE EXIT is a feature seen on some of our frames with internally routed cables. By slightly overlapping the downtube where it connects to the bottom bracket, it leaves a small space that allows cables to exit easily. This means they are easily accessible for routine maintenance or replacement, but it prevents excessive movement and noise that can cause wear and distraction.

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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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    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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    Similar to our F-MOUNT, where various fixing points for mudguards are part of the frame offering, the C-MOUNT equipped bikes have the fixing points for a rear rack already integrated, making fitting fast, simple and reliable. The C-MOUNTS are an additional feature that improves the day-to-day versatility by adding loading capacity to your bike, ideal for commuting and shopping trips. Please note that some bikes require model-specific rear racks.

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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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    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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