2023 Trek Marlin 8 Gen 3 Hardtail Mountain Bike

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The 2023 Trek Marlin 8 Gen 3 Hardtail Mountain Bike is a confidence-boosting trail bike with updated geometry. It gives you more control on singletrack without skipping on features for everyday use, like mounts for racks and a kick stand. It's built for years of progress thanks to 12-speed SRAM shifting and an upgraded RockShox air-spring suspension fork.

The Marlin 8 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 8 Gen 3 comes with a 100mm travel RockShox Judy Silver air fork with a lockout and 12 speed SRAM Eagle gearing. A TranzX dropper post and tubeless ready wheels and tyres complete the build.

This bike is perfect for

Mountain bikers who want a solid trail bike at an affordable price. With air forks, 12 speed gears, tubeless ready wheels and a dropper post this bike has everything you need for off-road adventures.

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
  • You get a premium RockShox fork with an air spring that's lighter and more adjustable than a coil
  • You get the simplicity and range of 1x12 drivetrain for putting down power on the trail
  • The included dropper post lets you get your saddle out of the way when you roll into technical sections and steeper descents.
  • Marlin models in sizes XXS and XS have a curved top tube and lower standover height that makes it easier for smaller riders to mount and dismount

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


Price Match at Cycles uk

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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 - RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout
Hub front - Formula DC-20 LW, alloy, 6-bolt, 5x100 mm QR
Hub rear - Formula DC-22LW, 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 - Maxxis Ardent, tubeless, EXO casing, folding bead, 60tpi, 26x2.40", Maxxis Ardent, tubeless, EXO casing, folding bead, 60tpi, 27.5x2.40" or Maxxis Ardent, tubeless, EXO casing, folding bead, 60tpi, 29x2.40"
Shifter - SRAM SX Eagle, 12-speed
Rear derailleur - SRAM SX Eagle
Crank - SRAM SX Eagle, 30T steel ring, 49 mm chainline
Bottom bracket - Truvativ Powerspline, 73 mm, threaded cartridge, 118 mm spindle
Cassette - SRAM PG-1210 Eagle, 11-50, 12-speed
Chain - SRAM SX Eagle, 12-speed
Saddle - Bontrager Arvada, steel rails, 138 mm width
Seatpost - TranzX JD-YSP18
Handlebar - Bontrager alloy, 31.8 mm
Grips - Bontrager XR Trail Comp, nylon lock-on
Stem - Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree
Head set - Semi-integrated, 1-1/8"
Brake - Shimano MT200 hydraulic disc
Brake rotor - Shimano RT26, 6-bolt,160 mm and Shimano RT26, 6-bolt,180 mm
Brake Set - Shimano MT200 hydraulic disc
Weight - Medium size – 14.29 kg/31.51 lbs

Weight limit - This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lbs).

Colours CRIMSON, MATTE DNISTER BLACK
Sizes L - 29 WHEEL, M - 29 WHEEL, ML - 29 WHEEL, S - 27.5 WHEEL, XL - 29 WHEEL, XS - 27.5 WHEEL, XXL - 29 WHEEL, XXS - 26 WHEEL
Brand Trek
Model Year 2023
Barcodes 601842864371, 601842864388, 601842864395, 601842864401, 601842864418, 601842864425, 601842864432, 601842864449, 601842864456, 601842864463, 601842864470, 601842864487, 601842864494, 601842864500, 601842864517, 601842864524
SKUs / Part Numbers 5277573, 5277574, 5277575, 5277576, 5277577, 5277578, 5277579, 5277580, 5277581, 5277582, 5277583, 5277584, 5277585, 5277586, 5277587, 5277588

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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