2023 Trek Marlin 6 Gen 3 Hardtail Mountain Bike
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The 2023 Trek Marlin 6 Gen 3 Hardtail Mountain Bike is perfect for progressing your skills on the trails. It comes with updated slacker frame geometry which makes it easier to control on descents, while the suspension fork takes the edge off bumpy trails.
The Marlin 6 is built around a lightweight aluminium frame with modern trail riding geometry and internal routing that keeps cables protected and keeps the bike looking sleek. Although the geometry is setup for off-road riding it is versatile enough for use on the road and on light trails. The smaller sizes come with 27.5” wheels while larger sizes come with 29” wheels. The XXS and XS sizes also have a curved top tube and lower standover height that makes it easier for smaller riders to mount and dismount
The Marlin 6 comes with an SR Suntour XCT 30 100mm travel front suspension fork that cushions rocks, roots and bumps in the trail. 1x10-speed Shimano Deore shifting is easy to use and low maintenance while the Tektro hydraulic brakes give serious stopping power.
This bike is perfect for
Mountain bikers who want a bike with modern trail geometry and the latest 1x drivetrain which will also double up for commuting, family rides and general use.
Key Features
- You get real-deal modern mountain bike geometry that keeps handling confident when you're on singletrack, but is versatile enough for use on roads and bike trails too
- Rack and mudguard mounts make it easy to accessorise, so your mountain bike can double as a rugged commuter
- The new Thru-Skew system is safer, simpler and stronger, plus it makes removing the rear wheel for flat fixes a piece of cake.
- Internal routing makes it easy to add a dropper post that lets you lower your saddle on the fly for more confident descending
Mountain Bike Buying Guide
Mountain biking is an incredibly diverse sport. Mountain bikes now come in three main flavours. They are XC, Trail and Enduro.
XC – short for cross country, are quick race bikes. They will normally have 29” wheels and come with 100mm of suspension. If you are mainly going to be riding bridleways and natural trails in the South East of England, where our shops are, an XC bike will be the quickest and most efficient option.
Trail – these bikes are designed to be pedalled up and down hill and for use on bridleways and natural trails, but also at dedicated trail centres. They normally come with 130mm or 140mm of suspension travel and can have either 27.5” or 29” wheels, but 29” is quickly becoming the norm. Trail bikes are good all-rounders. They won’t be as fast as an XC bike on the flat but they can handle a lot more challenging terrain, and a few jumps. If you plan on taking your bike to trail centres in Wales, or to the Alps, then a trail bike may be your best option.
Enduro – enduro racing is a thing in and of itself but many people buy enduro bikes for ‘aggressive’ trail riding and uplift days at places like Bike Park Wales. This generally means challenging downhill trails with some big jumps. With around 160mm of suspension travel enduro bikes can take some big hits. They are designed to be efficient enough to pedal up hills but really come into their own when pointed downhill. You get enduro bikes in either 27.5” or 29” wheel sizes as well as mullet setups of 29 at the front and 27.5 at the back.
Men’s and women’s mountain bikes
Nearly all the mountain bikes we sell are now unisex. All of the big brands have gradually stopped doing dedicated men’s and women’s bikes over the last few years. Instead they are focussed on producing bikes in a bigger range of sizes. So, for instance, the Trek Marlin 5 is a unisex bike that now comes in sizes from XXS to XXL large. This means it will fit riders from 4’ 5” to 6’ 5” and everything in between.
Read our full mountain bike buyers guide
Trek made their first bikes in 1976 in a barn in Wisconsin. Now they’re one of the biggest bike brands in the world. Trek bikes cover everything from professional-level road and mountain bike race bikes to commuters, hybrids and kids bikes. There is a strong heritage of racing at Trek and many Trek bikes have a strong race influence. They take a very scientific approach to researching bike and human performance and then make the fastest and most efficient bikes they can.
It doesn’t stop their attention and passion for cycling flows through everything they do. Since the 1990s, Trek has supported Places for Bikes. Places for Bikes is an advocacy organisation in the USA that gets more people on bikes more often! Places for Bikes ethos falls in line with the companies mission statement to:
Build only products we love. Provide incredible hospitality to our customers, and change the world by getting more people on bikes.
Frame - Alpha Silver Aluminium, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew
Fork - SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 42 mm offset
Hub front - Formula DC-20, alloy, 6-bolt, 100 mm ThruSkew
Hub rear - Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR
Skewer rear - Bontrager Switch thru axle
Rim - Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23 mm width, Presta valve
Spokes - 14 g stainless steel
Tyre - Bontrager XT3 Comp, wire bead, 30 tpi, 27.5x2.40" or Bontrager XT3 Comp, wire bead, 30 tpi, 29x2.40"
Shifter - Shimano Deore M4100, 10 speed
Rear derailleur - Shimano Deore M5120, long cage
Crank - Prowheel C10Y-NW, 30T steel narrow-wide ring, 170 mm length
Bottom bracket - VP BC73, 73 mm, threaded cartridge
Cassette - Shimano Deore M4100, 11-46, 10-speed
Chain - KMC X10, 10-speed
Pedal - VP-536 nylon platform
Saddle - Bontrager Arvada, steel rails, 138 mm width
Seatpost - Bontrager alloy, 31.6 mm, 12 mm offset
Handlebar - Bontrager alloy, 31.8 mm
Grips - Bontrager XR Endurance Comp, lock-on
Stem - Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree
Head set - Semi-integrated, 1-1/8"
Brakes - Tektro HD-M275 hydraulic disc, 180 mm rotor
Brake Set - Tektro HD-M275 hydraulic disc, 160 mm rotor
Weight Medium size - 14.80 kg / 32.63 lbs
Weight limit - This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lbs).
Please note: Manufacturers can sometimes change the specification of the products from time to time.
| Colours | BLUE SAGE, HEX BLUE TO DEEPDARK BLUE, MATTE DNISTER BLACK, MATTE OLIVE GREY |
| Sizes | L - 29 WHEEL, M - 29 WHEEL, ML - 29 WHEEL, S - 27.5 WHEEL, XL - 29 WHEEL, XS - 27.5 WHEEL, XXL - 29 WHEEL |
| Brand | Trek |
| Model Year | 2023 |
| Barcodes | 601842863169, 601842863176, 601842863183, 601842863190, 601842863206, 601842863213, 601842863220, 601842863244, 601842863251, 601842863268, 601842863275, 601842863282, 601842863299, 601842863305, 601842863329, 601842863336, 601842863343, 601842863350, 601842863367, 601842863374, 601842863381, 601842863404, 601842863411, 601842863428, 601842863435, 601842863442, 601842863459, 601842863466 |
| SKUs / Part Numbers | 5277256, 5277257, 5277258, 5277259, 5277260, 5277261, 5277262, 5277264, 5277265, 5277266, 5277267, 5277268, 5277269, 5277270, 5277272, 5277273, 5277274, 5277275, 5277276, 5277277, 5277278, 5277280, 5277281, 5277282, 5277283, 5277284, 5277285, 5277286 |
Why buy from Cycles UK?
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Cycles UK provides 14 days of free insurance on all new bikes sold to UK customers. As part of our service, your new bike is automatically covered with 14 days’ FREE insurance against theft and accidental damage.
Comfort Guarantee
Opinions of contact points such as saddles, shoes and grips can vary a lot between different riders. If you buy a contact point from Cycles UK and you don’t find it comfortable, you can return it within 30 days, and we’ll swap it for something else.
Trek Mountain Bike Size Guide
On most Trek mountain bikes the XS and S sizes will come with a 27.5" wheel while the M and above will come with a 29" wheel. The XXS size is generally a 26" wheel.
| Size | XXS | XS | S | M | M/L | L | XL | XXL |
| Rider Height (CM) | 134.6 - 144.7 | 145 - 154.6 | 155 - 164.75 | 165 - 172.5 | 172.75 - 180 | 180.25 - 187.75 | 188 - 195.25 | 195.5 - 203.25 |
| Rider Height (Feet and Inches) | 4' 4" - 4' 9.0" | 4' 9.1" - 5' 0.9" | 5' 1.0" - 5' 4.9" | 5' 5.0" - 5' 7.9" | 5' 8.0" - 5' 10.9" | 5' 11" - 6' 1.9" | 6' 2" - 6' 4.9" | 6' 5" - 6' 8" |
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