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Trek Marlin 6 Mountain Bike 2021

★★★★★ ★★★★★

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Marlin 6 Mountain Bike 2021

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Product ID: 1226981

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Built, Checked, Tuned and Tested

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.

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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.

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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

Technical Specification

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
Headset Semi-integrated, 1-1/8"
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 included), 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. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance or contact Customer Care. We do not install accessories to bikes, including mudguards.

Trek Marlin 6 Mountain Bike 2021 Sizing

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