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The 2026 Marlin 5 Gen 3 ML MULSANNE BLUE is available at the following locations.
The item will be transferred to the location you choose during checkout.
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Marlin 5 is a trail-worthy daily rider that's perfectly suited for everyday adventures, on and off the trail. It features a trail-savvy frame with a suspension fork, 9-speed Shimano CUES shifting and mounts for a rack and kickstand that make it an ideal choice for trail riders or anyone looking for a comfortable, stable commuter with the ruggedness of a real mountain bike.
An Alpha Silver aluminium hardtail frame with internal derailleur routing, and the complete bike weighs 15.10 kg in size M.
Its long, roomy shape puts you in a balanced position, so you feel steadier heading down rooty descents and the back tyre keeps its grip when a climb turns loose. It's a frame your skills can grow into.
An SR Suntour XCT 30 coil-sprung fork with 100 mm of travel (80 mm on size XS), preload adjustment and a hydraulic lockout.
It takes the sting out of roots and potholes, then locks firm so you don't bounce along the road home. It's a simple, weighty fork, happiest on steady trail rides rather than rough, fast descents.
Shimano CUES 9-speed gearing with a single 32T chainring, an 11-46T LinkGlide cassette and a U4000 rear derailleur.
The 46T sprocket gives you a low gear for steep, muddy climbs, with no front gears to juggle. LinkGlide is built to last and shift smoothly under load, which suits gritty winter miles.
Disc brakes on Shimano RT26 rotors, 180 mm at the front and 160 mm at the rear, with a 160 mm front rotor on sizes XS and S.
Discs keep stopping consistent through mud and rain, so a soggy trail or wet commute still feels in control. On bigger sizes the larger front rotor adds bite on long descents, where the front brake works hardest.
Bontrager Montrose Comp 2.40 in tyres on double-wall Bontrager Connection alloy rims, with 29 in wheels on sizes M to XXL and 27.5 in on XS and S.
The wide, grippy tyres bite in loose corners and cushion rough tracks, and the 29 in wheels on bigger sizes roll smoothly over roots and keep their momentum along gravel paths.
Rack and kickstand mounts on the frame, plus internal routing ready for a dropper seatpost.
Bolt on a rack and panniers and the Marlin handles the commute and shopping all week, then heads for the trails at the weekend. A dropper post can go in later to lower the saddle on steep descents.
Seven frame sizes from XS to XXL, with a curved top tube on size XS for a lower standover height.
Whether you're on the short side or very tall, there's a size that suits your height. On XS the dipped top tube gives smaller riders more room to stand over the bike and put a foot down at a stop.
How this bike compares with the other 2027 Trek Marlin models we sell, from entry level up. Only what differs is shown, and Upgrades says what each bike adds over the one before it.
| Model | Marlin 4 Gen 3 | This bikeMarlin 5 Gen 3 | Marlin 6 Gen 3 | Marlin 7 Gen 3 |
|---|---|---|---|---|
| Upgrades | A front fork with a lockout for smooth roads and 1 extra gear. | 1 extra gear, a wider gear range and wheels ready for tubeless tyres. | A better fork with hydraulic lockout, 2 extra gears and a lighter bike. | |
| Suspension | Front: 100 mm SR Suntour XCE 28 (80 mm on size XS; 100 mm SR Suntour XCM 30 with lockout on size XXS) | Front: 100 mm SR Suntour XCT 30 (hydraulic lockout) (80 mm on size XS) | Front: 100 mm RockShox Judy (lockout) | Front: 100 mm RockShox Judy Silver (TurnKey hydraulic lockout) |
| Drivetrain | Shimano Essa (1x8, 30T chainring, 11-45T cassette) | Shimano CUES (9-speed, 32T chainring, 11-46T cassette) | Shimano CUES U6000 rear derailleur (1x10, 30T chainring, 11-48T cassette) | SRAM NX Eagle derailleur (mechanical, 1x12, 30T chainring, 11-50T cassette) |
| Wheels | 29 in Bontrager Connection rims (27.5 in on sizes XS and S, 26 in on size XXS) | 29 in Bontrager Connection alloy rims (27.5 in on sizes XS and S) | 29 in Bontrager Kovee rims (tubeless ready) (27.5 in on sizes XS and S) | 29 in Bontrager Kovee alloy rims (tubeless ready) with Formula hubs (27.5 in on sizes XS and S) |
| Tyres | Bontrager Montrose Comp, 2.40 in (2.40 in on XS-S, 2.35 in on XXS) | Bontrager Montrose Comp, 2.40 in (29 in on M-XXL, 27.5 in on sizes XS and S) | Bontrager Montrose Comp, 2.40 in (27.5 in wheels on sizes XS and S) | Maxxis Rekon, 29x2.40 in (27.5x2.40 in on sizes XS and S) |
| Weight | 14.90 kg (size M) | 15.10 kg (size M) | 15.00 kg (size M) | 14.15 kg (size M) |
Frame is the same on all of them.
Smaller frames have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. Larger frame sizes have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.
Marlin comes in seven frame sizes to suit riders of any height, and Smart Wheel Size ensures you’re on the fastest wheel that fits. The smallest sizes even come with short-reach brake levers and narrower handlebars that give smaller riders better comfort and control.
Marlin looks and feels great. It’s packed with features usually found only on more expensive bikes, like a stylish frame with internal shift cable and brake hose routing, which can help your cables last longer by protecting them from the elements.
Inspired by rider demand for trouble-free drivetrain longevity and performance, Shimano CUES offers a new foundation for versatility and durability across a range of both electric and standard bikes. CUES features Shimano’s new LINKGLIDE drivetrain technology for significantly increased life on wear items like chain, cassette and chainrings.
Starting in 2024, we began removing high-emission aluminium from our manufacturing and replacing it with low-emission aluminium made with renewable energy. By October 2025, nearly every alloy bike we make – this one included – had made the switch, driving a major drop in our footprint.
LINKGLIDE technology has been specifically engineered for incredible durability while still delivering smooth and decisive shifting – along with a great pedalling experience. Available exclusively on Shimano CUES drivetrains.
Locked suspension means your fork remains inactive, increasing pedalling efficiency. Perfect for extended road sections where efficiency is more important than bump absorption.
Going for a long ride? Rack mounts make carrying accessories a breeze.
Bontrager stem technology lets you clip your gear directly to the stem for clean looks and maximum user friendliness.
We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.
Bontrager Blendr stem technology lets you clip your gear directly to the stem for clean looks and maximum user friendliness.
Please note: Manufacturers can sometimes change the specification of the products from time to time.
| Measurement | XS | S | M | ML | L | XL | XXL |
|---|---|---|---|---|---|---|---|
| Frame size number | 14.5" | 15.5" | 17.5" | 18.5" | 19.5" | 21.5" | 23" |
| Wheel size | 27.5" | 27.5" | 29" | 29" | 29" | 29" | 29" |
| A Seat tube (cm) | 34.0 | 37.0 | 42.0 | 43.5 | 45.0 | 50.0 | 54.0 |
| B Seat tube angle | 73.8° | 73.8° | 73.4° | 73.4° | 73.4° | 73.4° | 73.4° |
| Effective seat tube angle | 74.0° | 74.0° | 74.0° | 74.0° | 74.0° | 74.0° | 74.0° |
| C Head tube length (cm) | 9.0 | 10.0 | 10.5 | 11.0 | 11.5 | 13.5 | 15.0 |
| D Head angle | 66.5° | 66.5° | 66.5° | 66.5° | 66.5° | 66.5° | 66.5° |
| E Effective top tube (cm) | 55.1 | 57.9 | 61.5 | 63.1 | 64.7 | 67.8 | 70.7 |
| F Bottom bracket height (cm) | 31.3 | 31.3 | 30.8 | 30.8 | 30.8 | 30.8 | 30.8 |
| G Bottom bracket drop (cm) | 4.5 | 4.5 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 |
| H Chainstay length (cm) | 43.3 | 43.3 | 43.8 | 43.8 | 43.8 | 43.8 | 43.8 |
| I Offset (cm) | 4.2 | 4.2 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 |
| J Trail (cm) | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 |
| K Wheelbase (cm) | 109.2 | 112.1 | 116.3 | 118.0 | 119.7 | 123.0 | 126.1 |
| L Standover (cm) | 65.8 | 69.2 | 74.7 | 75.9 | 77.1 | 79.1 | 81.6 |
| M Reach (cm) | 39.0 | 41.5 | 44.0 | 45.5 | 47.0 | 49.5 | 52.0 |
| N Stack (cm) | 56.3 | 57.2 | 60.9 | 61.4 | 61.8 | 63.7 | 65.1 |
If your weekends mean forest singletrack, bridleways and woodland trails, the Marlin 5 is a brilliant first mountain bike. Its roomy, balanced riding position feels sure-footed heading downhill and keeps the rear tyre gripping on climbs. Chunky 2.40 in tyres and the suspension fork soak up rough ground, and the frame has internal routing ready for a dropper post, a saddle you can lower on the move.
Mixing weekday commutes with weekend trails is exactly what the Marlin 5 does well. There are mounts for a rack and kickstand, so it can carry panniers to work and stand up on its own when you get there, and locking out the fork keeps it firm on tarmac. The wide, grippy tyres feel steady over potholes, broken surfaces and gravel paths on the way home.
If you ride a bit of everything, the Marlin 5 is a lovely middle ground: over the Marlin 4 you gain a ninth gear and a fork that locks out for the road. Want tubeless-ready rims, so you can ditch the inner tubes, and a RockShox fork? That's the Marlin 6. The Marlin 7 adds a wider 12-speed range and weighs almost 1 kg less in size M.
Cross-country trails, bridleways and everyday riding are where the Marlin belongs, and it's just as happy carrying you to work as on a Sunday trail loop. If you're drawn to steeper, rougher trails and harder riding, the Roscoe is the better fit: it's a dedicated trail hardtail with a longer fork, wider tyres and a dropper post on every model.
With seven sizes, there's a fit from 145 cm (4 ft 9 in) on the XS to 203 cm (6 ft 8 in) on the XXL. Smaller riders on the XS and S get 27.5 in wheels and narrower bars, and the XS adds a dipped top tube that's easier to stand over. If you're between sizes, let your inside leg measurement help you decide.
Simplicity is the big win. With a single shifter and nothing to adjust at the front, you just click up or down the 9 gears at the back and keep your mind on the trail. The wide spread of rear sprockets still gives you a bottom gear easier than 1:1 for winching up steep climbs, and a top gear tall enough to cruise along the road to the trails.
Plenty for mixed trails: there's 100 mm of travel on every size except the XS, which has 80 mm. That smooths out roots, stones and rutted bridleways, and you can tweak how firm it feels with the preload adjuster. Lock it out on smooth climbs and fire roads and it stops bobbing, so more of your pedalling drives you forward.
In a size M the Marlin 5 weighs 15.10 kg. For heavier riders, the figure to know is the maximum total weight of 136 kg, which covers the bike, you and anything you carry together. On a size M that leaves about 120 kg for you and your kit, including loaded panniers on the commute.
However you ride, bring it to your nearest Bicycle Chain store for its free first check within 6 weeks, or within about 3 weeks if you commute on it daily. If anything feels wrong before then, book it in straight away. After that, we recommend a service every 6 months if you ride regularly, or every 12 months if you ride occasionally, to keep it smooth and reliable.
As the original owner, you get a lifetime warranty on the aluminium frame, and anyone you sell it to gets 3 years from the original purchase. Trek's own parts, the alloy wheels and the paint have 2 years, while the suspension fork and gears are covered by their makers' own warranties. Claims go through an authorised retailer with proof of purchase; wear and tear and crash damage aren't covered.
We price match all products on a like for like basis.
To qualify the item must be available in stock with a UK supplier and any additional costs taken into consideration.
i.e delivery charges, buyers premium, assembly charges.
Call us on 01823 252499 before you make your purchase to enquire about price matching a product.
With all bike sales you will receive an informational bike pack that contains a 15% Off accessories voucher inside.
This voucher is redeemable at your nearest Bicycle Chain Store.
We currently have stores in Yeovil, Taunton, Bridgwater, Weston-Super-Mare and Hereford.
This is part of our 'Support Local Business' initiative, where we want to see local riders supported by their local bike shops.
We hope to see you in store soon.
When you buy a bike from us in the store or come to collect your Click & Collect order we will adjust your new bike to fit you.
This includes adjusting saddle height, saddle position and where possible adjusting the brake levers / gear shifters.
We will also adjust any accessories you have purchased with your bike where applicable.
When you buy a bike from us you will get a free service at your nearest Bicycle Chain store within 6 weeks of taking delivery of your bike.
The free service is put in place to make sure the bike you have purchased is running correctly and to adjust out any cable stretch that happens to any new bike.
The type of bike you have bought and the type of riding you have planned will affect how soon you need to book your free service.
However if you experience any issues at any time you should stop riding your bike and book your bike in for its free service immediately.
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with a £ 0.00 deposit.
The total charge for credit is £ 0.00.
Please note the above quotation is an indicative cost and actual monthly payments may vary by +/- 2p per month.
Credit subject to status and affordability. Terms & Conditions Apply. The Bicycle Chain is a credit broker and is Authorised and Regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Financial Services Register no. 704348. The register can be accessed through http://www.fca.org.uk.
24 Month Representative Example:
Purchase Price (incl. VAT) £750
Deposit £75
Loan Amount £675
Interest/Total Charge for Credit £109.32
Total Amount Repayable £859.32
Balance Payable £784.32
By 24 Monthly Repayments of £32.68
15.9% APR Representative
Bank rate of interest 8.1% PA fixed
Please note the above quotation is an indicative cost and actual monthly payments may vary.
For Buy Now Pay Later and Deferred Interest Bearing Credit: Interest is charged from day 1 of your agreement, but not charged on any repayments made during the deferral period. On expiry of the deferral period, interest accrued during the deferral period will be applied to your repayments.
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