Trek Marlin 5 Gen 3 Mountain Bike - Hardtail Bike - Green - Size XS

Name: Trek Marlin 5 Gen 3 Mountain Bike - Hardtail Bike - Green - Size XS
Brand: Trek
SKU: syrhmk4f7f
Availability: InStock

New to the trails or looking for a rugged commuter that’ll also double as a trail mountain bike? T...

Best current price£625.00from Evans Cycles UK

Best offers

Shopping.co.uk recommended and popular offers

Lowest price

Evans Cycles UK£625.00Visit shop

Trek Marlin 5 Gen 3 2026 Mountain Bike Extra Small Red

Visit shop

All Offers

31 offers from £625.00

View price history by clicking the chart icon.

Evans Cycles UKTrek Marlin 5 Gen 3 2026 Mountain Bike Extra Small Red

£49.99 delivery

£625.00

Visit shop

Team CyclesTrek Unisex Green Marlin 5 Gen 3 Hardtail Mountain Bike Miami And Dark Aquatic Fade

Free delivery in 1–3 days

£625.00

Visit shop

TisoUnisex Trek Marlin 5 Gen 3 Mountain Bike - Hardtail Mountain Bike - Red - Size XS

Free delivery in 1–3 days

£625.00

Visit shop

TredzTrek Fury Red Marlin Gen 3 Mountain Bike 2027 - Hardtail Mtb Size 5

Free delivery in 1–3 days

£625.00

Visit shop

Product Information

Full details

The Trek Marlin 5 Gen 3 is a versatile mountain bike designed for new riders and commuters looking for a rugged, reliable ride. It offers a lightweight aluminum frame, updated Shimano CUES drivetrain, and hydraulic disc brakes for confident control on trails and roads. Note that while it excels in various conditions, it's best suited for those starting out or looking for a budget-friendly option.

All features

Model Part Number	Marlin 5 Gen 3
Brand	Trek

Extended Product Information

FAQs

What is the recommended tire pressure?

The recommended tire pressure is usually indicated on the tire sidewall. Check the sidewall for the specific PSI (pounds per square inch) range.

How often should I lubricate the chain?

Lubricate the chain every 100-200 miles, or more often if you ride in wet or muddy conditions. Clean the chain before lubricating.

How do I adjust the saddle height?

Stand next to the bike and place your heel on the pedal. Your leg should be straight. Then, when you are in riding position your leg should have a slight bend at the bottom of the pedal stroke.

What kind of maintenance do the hydraulic brakes require?

Hydraulic brakes may require bleeding to remove air from the lines, and replacement of brake pads when they wear down. Consult a professional for servicing.

Can I install a rack and fenders?

Yes, the Marlin 5 Gen 3 has rack and fender mounts, making it easy to install these accessories.

What is the warranty on the frame?

Trek offers a limited lifetime warranty on the frame against manufacturing defects. Contact Trek or your local Trek dealer for specifics.

What is Smart Wheel Sizing?

Smart Wheel Sizing means that the wheel size is optimized for the rider's frame size. Smaller frames get 27.5" wheels, while larger frames get 29" wheels, to provide the best possible fit and performance.

Troubleshooting

Gears are not shifting smoothly.

Adjust the derailleur indexing by turning the barrel adjuster on the rear derailleur. Check the cable tension and lubricate the chain and derailleurs.

Brakes feel spongy.

Bleed the hydraulic brakes to remove air bubbles from the brake lines. Check brake pads for wear.

Tires are going flat frequently.

Check the tires for punctures and replace them. Check the tire pressure before each ride.

Creaking noises while riding.

Check the pedals, bottom bracket, and seat post for tightness. Clean and lubricate these components.

Bike feels unstable.

Ensure tires are inflated to the recommended pressure. Check the headset for play and tighten if necessary.

Pros and Cons

Pros

Durable and reliable for both trails and commuting.
Features like Smart Wheel Sizing and a suspension fork enhance the riding experience.
Hydraulic disc brakes provide excellent stopping power in various conditions.
The Shimano CUES drivetrain offers increased lifespan compared to other drivetrains.

Cons

Entry-level components may not suit experienced riders.
Suspension fork may not be as advanced as those found on higher-end models.
The weight may be slightly higher compared to more expensive models.
Limited upgrade options compared to higher-end mountain bikes.

Setup, Compatibility & Care

Setup

Assembly: The bike will require some assembly upon delivery. Follow the included instructions or take it to a local bike shop for professional assembly.
Saddle Height: Adjust the saddle height for optimal leg extension while pedaling. Your leg should be almost fully extended at the bottom of the pedal stroke.
Handlebar Position: Adjust the handlebar position for a comfortable reach and control.
Tire Pressure: Inflate the tires to the recommended pressure, indicated on the tire sidewall.

Compatibility

Accessories: Compatible with standard mountain bike accessories like water bottle cages, racks, and fenders. Utilize the Bontrager Blendr stem for compatible accessories.
Components: The bike uses standard components, making it easier to find replacement parts and upgrades if needed.

Care

Cleaning: Regularly clean the bike with a mild soap and water solution, especially after riding in muddy conditions.
Lubrication: Lubricate the chain regularly with chain lubricant to ensure smooth shifting and prevent rust.
Brake Maintenance: Inspect and maintain the hydraulic disc brakes. Check the brake pads for wear and replace them if necessary.
Storage: Store the bike in a dry, covered area to protect it from the elements.