Skip to content 
- Home
- Bikes
- Hardtail Mountain Bikes
- Trek Marlin 4 Gen 2 Hardtail Mountain Bike 2025
Trek
Trek Marlin 4 Gen 2 Hardtail Mountain Bike 2025
Trek Marlin 4 Gen 2 Hardtail Mountain Bike 2025
The Marlin 4 is the gateway mountain bike that will take you from rail trails to singletrack. It's ideal for riders who want a mountain bike with knobby tyres that can double as a rugged commuter. Disc brakes, front suspension, Shimano 14-speed shifting and mounts for a rack and mudguards make this a great bike for trail riders and campus commuters alike.
It's right for you if...
You want an introductory mountain bike at an incredible price, but also want a commuter that's rugged enough to hop kerbs on the way to class.
The tech you get
A lightweight aluminium frame with internal routing to protect your cables and add to the bike's sleek look, trustworthy 14-speed Shimano shifting with a wide range of gearing so you always have the right gear for your terrain, powerful mechanical disc brakes and a suspension fork that takes the edge off bumps and rough terrain.
Why you'll love it
- The Marlin Gen 2 gives you all-around versatility with fast-rolling tyres and balanced, neutral geometry that keeps you comfortable and in control off-road. No wonder it’s our best-selling mountain bike ever.
- Rack and mudguard mounts make it easy to accessorise, so your mountain bike can double as a rugged commuter
- Smaller frame sizes (XS and S) have short-reach brake levers that make it easier and more comfortable for riders with smaller hands to brake confidently
- 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
- Like every Trek, it's backed by a lifetime warranty
The final word
The Marlin is made for any adventure. The rack and mudguard mounts make it a great choice for commuters who want to get a little rad on the way to class or the shops.
Frame | Alpha Silver Aluminium, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5 mm QR |
Fork | SR Suntour XCE 28, coil spring, preload, 100 mm QR, 100 mm travel (80mm travel on size XS) |
Headset | Semi-integrated, 1-1/8" |
Shifters | Shimano Altus EF500, 7-speed, Shimano EF500, 2-speed |
Front derailleur | Shimano Altus M315, 34.9 mm clamp, top swing, dual pull |
Rear derailleur | Shimano Tourney TY300 |
Chainset | Size: XS , S , M Size: ML , L , XL , XXL |
Bottom bracket | VP BC73, 73 mm, threaded cartridge |
Chain | KMC Z7, 7-speed |
Cassette | Shimano TZ500, 14-34, 7-speed |
Wheelset | Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve |
Hubs | Formula DC-20, alloy, 6-bolt, 5x100 mm QR Formula DC-31, alloy, 6-bolt, 6/7/8-speed freewheel, 135x5 mm QR |
Spokes | 14 g stainless steel, black |
Brakes | Tektro MD-M280 mechanical disc, Tektro, 6-bolt, 160mm |
Handlebars | Size: XS , S Size: M , ML , L , XL , XXL |
Grips | Bontrager XR Endurance Comp, lock-on |
Stem | Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree |
Saddle | Bontrager Verse Short, stainless steel rails |
Seatpost | Size: XS , S Size: M Size: ML , L , XL , XXL |
Pedals | VP-536 nylon platform |
Customer reviews
We aim to provide efficient delivery on all packages to mainland UK addresses. There are some areas where we will need to charge slightly more due to postage costs such as Highlands & Islands, Southern Ireland & Isle of Man.
Delivery is charged at £5.95 for standard delivery to UK mainland (see below for exceptions). Next working day delivery available for £6.95 if order before 1pm. Bikes are subject to £10.00 carriage charge. Exceptions can be found below. E-Bikes are subject to £30.00 carriage charge due to higher weight and value involved for insurance purposes.
Free delivery is available for orders over £75 and is a 2 working day service.
Orders placed before 12pm Monday to Thursday will be shipped the same day for next day delivery. Orders placed after 12pm Thursday and onwards will be shipped on Monday.
DUE TO THE CURRENT HIGH DEMAND, DELIVERY TIME FOR BIKES IS 7-10 DAYS. ALL PARTS AND ACCESSORIES ARE STILL 1-2 DAYS.
We use DPD for all our shipments:
DPD offer an excellent delivery service, with full tracking information and an hour time slot given on the day of delivery. You can also change the destination of your parcel, including local drop off points.
*Saturday delivery can be arranged at extra cost, please call for details.
SHIPPING EXCEPTIONS & SURCHARGES
Unfortunately due to the policies of our chosen shipping companies we regret that we will have to apply a separate charge to selected postcodes in the UK for some of our packages. If we need to apply this charge we will contact you after your order has been placed and work out the extra shipping charge. We do ship outwith the UK, please contact us for prices and options.
NORTHERN IRELAND POSTCODE SHIPPING EXCEPTIONS
Postcodes in Northern Ireland will carry a further charge for shipping, please contact for more details and prices.
ABERDEENSHIRE POSTCODE SHIPPING EXCEPTIONS
Postcodes in Aberdeenshire carry a further charge for large item shipping.
OUTER HEBRIDES POSTCODE SHIPPING EXCEPTIONS
Postcodes in the Outer Hebrides will carry a further charge for large item shipping, please contact for more details and prices.
INVERNESSHIRE POSTCODE SHIPPING EXCEPTIONS
Postcodes in Invernesshire carry a further charge for large item shipping.
KIRKWALL AREA POSTCODE SHIPPING EXCEPTIONS
Postcodes in the Kirkwall area carry a further charge for large item shipping shipping.
PAISLEY (WESTERN ISLES) POSTCODE SHIPPING EXCEPTIONS
Postcodes ranging from PA20 - PA80 in the Paisley & Western Isles will carry a further charge for large item shipping, please contact for more details and prices.
SHETLAND ISLES AREA SHIPPING EXCEPTIONS
Postcode within the Shetland Isles will carry a further charge for large item shipping, please contact for more details and prices.