Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with PedalSure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Trek Marlin 6 Mountain Bike 2021
The Trek Marlin 6 Mountain Bike is a joy to ride. The aluminium frame is paired to a 100mm travel R Suntour XCT 30 fork giving you plenty of bump-smoothing suspension for the rougher stuff, with a lockout for when you're on the tarmac or smoother trails. It's not only highly capable out on the trails but add a rack and kickstand to the integrated mounts and it can be transformed into a great commuter too.
Shimano Altus components make up the drivetrain, offering a wide range of gears in a 2x configuration, plenty for hills and descents alike, while the Tektro hydraulic disc brakes offer modulated power so you can stop fast in wet and dry conditions. Cables are all routed internally, keeping them well protected from the elements. A key feature of this bike is that the tube shapes differ depending on the size of the frame. The XS and S have a curved top tube and therefore a lower standover height, making mounting and dismounting easier if you're a smaller rider. The Bontrager wheels are also sized in the same way; 27.5" on the smaller bikes and 29" on the larger ones, ensuring confident handling across the range.
- Lightweight Alpha Silver Aluminium frame
- RockShox Judy fork with 100mm travel and lockout feature
- Shimano Altus 2x8-speed drivetrain, wide-ranging 11-34-tooth cassette and hydraulic disc brakes
- Internal cable routing
- Marlin models in XS and S frame sizes have a curved top tube and a lower standover height that makes it easier for smaller riders to mount and dismount
|Frame||Trek Alpha Silver Aluminium, low standover, internal routing, chainstay disc-brake mount, rack and kickstand mount, 135x5 mm QR|
|Fork||SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 51mm offset for 29" wheel, 100mm QR, 100mm travel|
|Bottom Bracket||VP BC73, 73mm, threaded cartridge|
|Stem||Bontrager alloy, 31.8mm, Blendr compatible, 7 degree|
|Handlebar||Bontrager alloy, 31.8mm, 5mm rise|
|Grips||Bontrager XR Endurance Comp|
|Front Brake||Tektro HD-M276 hydraulic disc|
|Rear Brake||Tektro HD-M276 hydraulic disc|
|Brake Levers||Tektro, short-reach lever (XS/S only)|
|Front Derailleur||Shimano Altus M315, 34.9 mm clamp, top swing, dual pull|
|Rear Derailleur||Shimano Altus M310|
|Shift Levers||Shimano Altus M315, 8-speed|
|Chain||KMC Z8.3, 8-speed|
|Cassette||Shimano HG31, 11-34, 8-speed|
|Crankset||Shimano M315, 36/22t|
|Front Wheel||Formula DC-20, alloy, 6-bolt, 5x100mm QR hub / Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve rim|
|Rear Wheel||Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5mm QR / Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve rim|
|Front Tyre||Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.20" (27.5" - XS/S), clincher|
|Rear Tyre||Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.20" (27.5" - XS/S), clincher|
|Saddle||Bontrager Arvada, steel rails|
|Seatpost||Bontrager alloy, 31.6mm, 12mm offset|
|Pedals||VP-536 nylon platform|
|Manufacturer Claimed Weight||14.50kg / 31.97lbs (size M)|
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if specified), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. We do not install accessories to bikes, including mudguards.
Trek Marlin 6 Mountain Bike 2021 Sizing
Forgotten Your Password?
Please enter your registered email address below and we'll send you an email explaining the next step.
Select a store
Select the store you visit most frequently below and their stock information will show on product pages.