2026 Trek Marlin 4 Gen 3 Hardtail Mountain Bike
Finance available with Novuna Personal Finance
Save with Cycle to Work
At Cycles UK we accept all major cycle to work scheme vouchers online and instore. Just enter your certificate details during checkout.
The 2026 Trek Marlin 4 Gen 3 Hardtail Mountain Bike M BLUE SAGE is available at the following locations.
The item will be transferred to the location you choose during checkout.
If the item is not currently available to view at your desired location, please call your nearest store to arrange for it to be transferred.
The 2026 Trek Marlin 4 Gen 3 Hardtail Mountain Bike is the entry level bike in the Marlin range. For 2026 it has a major upgrade with a new frame and hydraulic disc brakes instead of mechanical. The Marlin 4 is perfectly suited for everyday adventures, on and off the trail. It's an ideal choice for trail riders or anyone looking for a comfortable, stable commuter with the ruggedness of a real mountain bike.
The Marlin is built around a lightweight aluminium frame with internal routing to protect your cables and add to the bike's sleek look. Big tyre clearance and slack, confidence-boosting geometry keeps you stable from singletrack to city. The frame and wheels vary according to the size of the bike. The XXS and XS bikes have a curved top tube to reduce the standover height. The XXS bikes comes with 26" wheels, the XS and S sizes come with 27.5" wheels and all other sizes come with 29" wheels.
The Marlin 4 comes with Shimano's new 8 speed ESSA gears and Tektro hydraulic brakes. Most sizes come with a 100mm travel SR Suntour XCE 28 fork, the XSmall size comes with an 80mm version.
This bike is perfect for
Beginner mountain bikers who want a properly equipped bike on a budget. With mounts for kickstands and racks it also doubles up as a tough commuter.
Key Features
- The Marlin Gen 3 gives you serious trail capability, with big tyre clearance and slack, confidence-boosting geometry that keeps you stable from singletrack to city
- Rack and kickstand mounts make it easy to accessorise, so your mountain bike can double as a rugged commuter
- Its ThruSkew system is safer, simpler and stronger, plus it makes removing the rear wheel easy for flat fixes in a hurry Internal routing makes it easy to add a dropper post that lets you lower your saddle on the fly for more confident descending
- 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
Trek Marlin Sizing
Different size Trek marlins can come with a different frame and wheel size. The size small and Xsmall Marlin comes with a 27.5" wheels. The Medium, Large and Xlarge come with a 29" wheel. The XSmall size also comes with a curved top tube on the frame to increase standover height for shorter riders. The larger bikes have a straight top tube.
Below is the sizing chart provided by Trek for the Marlin bikes:
| Size | Rider Height | Inseam |
| XS | 145 - 155 cm | 69 - 73 cm |
| 4'9" - 5'1" | 27" - 29" | |
| S | 155 - 165 cm | 74 - 78 cm |
| 5'1" - 5'5" | 29" - 31" | |
| M | 165 - 177 cm | 79 - 83 cm |
| 5'5" - 5'10" | 31" - 33" | |
| ML | 173 - 180 cm | 81 - 86 cm |
| 5'8" - 5'11" | 32" - 34" | |
| L | 177 - 188 cm | 84 - 89 cm |
| 5'10" - 6'2" | 33" - 35" | |
| XL | 188 - 195 cm | 89 - 91 cm |
| 6'2" - 6'5" | 35" - 36" | |
| 2XL | 195 - 203 cm | 91 - 97 cm |
| 6'5" - 6'8" | 36" - 38" |
Price Match at Cycles uk
We understand that price is important, so we regularly price-check our competitors to make sure we have the best offers available. We recognise that we will not always be the cheapest, so if you see the same product cheaper from any of our competitors then please get in touch via the form below and we will do our best to match any reasonable advertised price.
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 XCE 28, coil spring, preload, 46 mm offset for 29" wheel, 100 mm QR, 100 mm travel (80mm on size Xsmall)
Hub front - Formula DC-20, alloy, 6-bolt, 5x100 mm QR
Hub rear - Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR
Skewer rear - 173x5 mm QR
Rim - Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
Tyre - Bontrager Montrose comp, wire bead, 30 tpi
Shifter - Shimano M315, 8-speed
Rear derailleur - Shimano ESSA U2000
Crank - ProWheel alloy, 32T narrow-wide steel ring
Cassette - Shimano HG300, 11-45, 8-speed
Chain - KMC Z8.3, 8-speed
Pedal - nylon platform
Saddle - Bontrager Verse Short, stainless steel rails
Seatpost - Bontrager alloy, 31.6 mm, 12 mm offset
Handlebar - Bontrager alloy, 31.8 mm
Grips - Trek Line Comp, nylon lock-on
Stem - Bontrager Comp, 31.8 mm, 7-degree
Head set - Semi-integrated, 1-1/8''
Brake - Tektro HD-M276 hydraulic disc
Brake rotor - Tektro, 6-bolt, 160mm
Weight - Medium size - 14.90 kg / 32.85 lbs
Weight limit - This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
| Colours | BLUE SAGE, MATTE DARK WEB, PURPLE FLIP/BLACK FADE |
| Sizes | L, M, ML, S, XL, XS, XXL |
| Brand | Trek |
| Model Year | 2026 |
| Barcodes | 197216252030, 197216252047, 197216252054, 197216252061, 197216252078, 197216252085, 197216252092, 197216252108, 197216252115, 197216252122, 197216252139, 197216252146, 197216252153, 197216252160, 197216252177, 197216252184, 197216252191, 197216252207, 197216252214, 197216252221, 197216252238 |
| SKUs / Part Numbers | 5336955, 5336956, 5336957, 5336958, 5336959, 5336960, 5336961, 5336962, 5336963, 5336964, 5336965, 5336966, 5336967, 5336968, 5336969, 5336970, 5336971, 5336972, 5336973, 5336974, 5336975 |
Please note: Manufacturers can sometimes change the specification of the products from time to time.
Why buy from Cycles UK?
We Deliver
You can choose how to receive your new bike. You can click and collect from our stores, pick a fast courier delivery or premium hand delivery. Whichever option you choose your bike will be fully assembled and checked by one of our experienced mechanics.
Price Promise
We regularly check our prices against our competitors to ensure that you are getting a good deal. If you find an item cheaper within seven days of purchase, just let us know and ask us to match the price.
Free Insurance
Our partners at Laka provides 30 days of free insurance on all new bikes sold to UK customers. As part of our service, your new bike is automatically covered with 30 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.
with a £ 0.00 deposit.
The total charge for credit is £ 0.00.
Choose an available finance option:
To apply, add the item to your basket and apply for finance on your entire basket.
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. Cycles UK Ltd 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.
Consumer credit services are only available to over 18s and subject to status.
This is for estimation purposes only. Actual Finance Application is Completed During Checkout.