| Monday | 9.00am - 5.30pm |
| Tuesday | 9.00am - 5.30pm |
| Wednesday | 9.00am - 5.30pm |
| Thursday | 9.00am - 5.30pm |
| Friday | 9.00am - 5.30pm |
| Saturday | 9.00am - 5.30pm |
| Sunday | 10.00am - 4.00pm |
| Bank Holidays | 10.00am - 5.00pm |
2026 Merida Silex 4000 Gravel Bike in Warm Slate Grey
Click & Collect - Always fast, easy & free
Select Click & Collect at checkout and pick up your order at a convenient location
| Monday | 9am - 5.30pm |
| Tuesday | 9am - 5.30pm |
| Wednesday | 9am - 5.30pm |
| Thursday | 9am - 5.30pm |
| Friday | 9am - 5.30pm |
| Saturday | 9am - 5.30pm |
| Sunday | 10am - 4.00pm |
| Bank Holidays | 10am - 4.00pm |
| Monday | 8am - 6.00pm |
| Tuesday | 8am - 6.00pm |
| Wednesday | 8am - 6.00pm |
| Thursday | 8am - 6.00pm |
| Friday | 8am - 6.00pm |
| Saturday | 9am - 5.30pm |
| Sunday | 10am - 4.00pm |
| Bank Holidays | 10am - 5.00pm |
Carbon gravel bike with Shimano's highly acclaimed gravel specific GRX 2 x 10 groupset and hydraulic disc brakes.
Over time gravel has evolved, splitting in to racing and adventure. Silex remains all about the road less travelled, the spirit of adventure and camaraderie. The new Mission platform takes on the role of racing. That's not to say the Silex was a slouch off-road, a week before its launch, Matej Mohoric won the 2023 Gravel World Championships! The Silex concept was a ground up design that rather than taking a road or cyclocross bike and re-jigging the recipe, started with modern MTB inspired geometry; long top and head tubes and a short stem, offering nimble, confidence-inspiring off road handling. This 2nd gen frame runs a revised fork design meaning you can swap to a suspension fork without affecting the geometry. 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. All Silex (except the 200) feature 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 carbon models calipers sit on CNCd aluminium Disc Cooler fins reducing operating temperatures by up to 35%; particularly important when running fully loaded.
All UK Mainland Bike Deliveries Over £999 - Free Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).Bike orders under £999 will incur a £25 delivery fee.
Free Delivery On Orders Over £50.00 - When you spend more than £50.00 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.
Click & Collect Orders -Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.
At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged.
Find Out More About Returns >
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bottom bracket
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Attached
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brakes
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Front: Shimano GRX400; Hydraulic disc with Shimano RT54; 180mm Rear: Shimano GRX400; Hydraulic disc with Shimano RT54; 180mm
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brake levers
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Shimano GRX 410
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cassette
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Shimano CS-HG50; 11-36 teeth; 10 speed
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chain
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KMC X10
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crankset
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Shimano GRX600; 46-30 tooth chainset; Crank length: (XXS-XS) - 165mm, (S-M) - 170mm, (L-XL) - 172.5mm
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fork
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Merida Silex II CF2; Tapered; material: carbon; 700x47C max. tyre size
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frame
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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)
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grips
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Merida Road Expert
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handlebars
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Merida Expert GRII; material: aluminium; (XXS-S) - 400mm wide, M - 420mm wide, (L-XL) - 440mm wide
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headset
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Acros ICR Merida External neck w/diecast splitring
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rear derailleur
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Shimano GRX400
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saddle
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Merida Comp SL; 25% recycled material; V-mount
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seatpost
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Merida Expert SL; 27.2mm diameter; in-line; material: carbon
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shifters
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Front: Shimano GRX 400; disc, Rear: Shimano GRX 400; disc
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tyres
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Front: Maxxis Rambler; 700x45C; kevlar bead; TR; EXO Rear: Maxxis Rambler; 700x45C; kevlar bead; TR; EXO
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wheelset
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Rims: Reynolds G30 Spokes: Black stainless Front Hub: Shimano HB-TC500; 100x12mm; 28 Spoke; Centerlock Rear Hub: Shimano FH-TC500-HM; 12-142mm; 28 Spoke; Centerlock
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Please note the following size guides are a general overview and represent a rough guide to bike sizing. Each bike may deviate from these figures.
Road Bikes
| Size | XXS | XS | S | M | L | XL | XXL |
| Height (cm) | 155 - 160 | 160 - 166 | 167 - 172 | 173 - 179 | 180 - 185 | 186 - 191 | 192 - 207 |
Mountain Bikes
| Size | XS | S | M | L | XL |
| Height (cm) | 145 - 160 | 150 - 165 | 160 - 175 | 170 - 185 | 180 - 200 |
Hybrid & Urban Bikes
| Size | XS | S | M | L | XL |
| Height (cm) | 150 - 160 | 160 - 170 | 170 - 180 | 180 - 190 | 190 - 200 |



