Trek Marlin 4 Gen 3 Mountain Bike - Purple - Size XL

The Marlin 4 Gen 3 is the perfect entry-level mountain bike, ready to take you from scenic rail tr...

Best current price£525.00from Evans Cycles UK

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Evans Cycles UKTrek Marlin 4 Gen 3 2026 Mountain Bike Small Black
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Team CyclesTrek Unisex Black Marlin 4 Gen 3 Hardtail Mountain Bike Matte Dark Web
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TisoUnisex Trek Marlin 4 Gen 3 Mountain Bike - Hardtail Mountain Bike - Black - Size XS
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TredzTrek Matte Dark Web Marlin Gen 3 Mountain Bike 2027 - Hardtail Mtb Size 4
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Product Information

Full details

The Trek Marlin 4 Gen 3 is an entry-level mountain bike designed for versatile use, suitable for both casual trail riding and daily commuting. Its key benefit lies in its rugged build and thoughtful features that offer confidence and control to new riders. A potential consideration is its weight, which is typical for its class but may be noticeable on longer climbs. Key features include a durable Alpha Silver Aluminum frame, 100mm of front suspension with lockout, reliable hydraulic disc brakes, and an 8-speed Shimano drivetrain.

All features

Model Part Number5336974
BrandTrek

Extended Product Information

FAQs

What is the maximum rider weight?

The product information does not specify a maximum rider weight limit. However, it is constructed with Alpha Silver Aluminum, designed for durability for its intended use.

What size bike should I get?

Refer to the Trek Marlin Sizing chart provided. It lists rider heights and inseam measurements for each frame size, from XXS to XXXL.

Can I install a dropper post?

Yes, the frame features internal routing for dropper posts, making it compatible for future upgrades.

How do I use the suspension lockout?

The suspension lockout is typically controlled by a dial or lever on the suspension fork. Engaging it 'locks out' the suspension, making it more rigid for efficient pedaling on smooth surfaces. Disengage it for absorbing bumps on trails.

What is Blendr compatibility?

Blendr is Trek's system that allows you to integrate accessories like lights and computers directly onto the stem for a clean look and user-friendly mounting.

Can I use this bike for commuting?

Yes, the Marlin 4 Gen 3 is suitable for commuting, especially with the addition of rack and mudguard mounts. Its robust build can handle varied urban conditions.

What type of tires does it come with?

It comes equipped with Bontrager Montrose comp tires, which are designed for traction and versatility on various surfaces.

Troubleshooting

Bike makes unusual noises

Check for loose components such as the seatpost, handlebars, pedals, and wheels. Ensure the chain is properly lubricated and not excessively worn. Have a mechanic inspect for drivetrain or brake noise.

Gears are not shifting smoothly

Ensure the rear derailleur is properly aligned. Check the shifter cable for damage or contamination. Adjust the derailleur limit screws and cable tension as needed, or consult a mechanic.

Brakes feel weak or spongy

Check brake pad wear and alignment. Ensure the hydraulic brake lines are not damaged and free of leaks. Bleed the brakes if air is suspected in the system, or have a mechanic service the brakes.

Suspension feels stiff or unresponsive

Ensure the suspension lockout is disengaged. Check that the fork's preload is set appropriately. For persistent issues, the fork may require servicing.

Pros and Cons

Pros

  • Versatile for both trails and commuting.
  • Reliable hydraulic disc brakes for confident stopping.
  • Front suspension with lockout for varied terrain and efficient pedaling.
  • Durable Alpha Silver Aluminum frame.
  • Mounts for racks and mudguards add utility.
  • Designed with smaller riders in mind, including shorter reach levers and lower standover height on smaller frames.

Cons

  • Weight (14.9kg for size M) may be a factor for aggressive riding or long climbs.
  • Entry-level components may require upgrades for advanced trail use.
  • Limited suspension options (front only).
  • Trek reserves the right to substitute parts due to supply chain issues, which may affect exact specifications.

Setup, Compatibility & Care

Setup: Most bikes are shipped partially assembled. It is recommended to have a professional bike mechanic complete the assembly and safety checks to ensure optimal performance and safety. This includes correct installation of handlebars, pedals, saddle, and brake/gear adjustments.

Compatibility: The frame features internal routing for derailleurs and dropper posts, and has mounts for racks and kickstands. It is compatible with standard Schrader valves for tires. Note that Trek may substitute compatible parts due to supply chain issues.

Care: Keep the bike clean by wiping it down with a damp cloth after rides, especially after exposure to mud or rain. Regularly check tire pressure. Inspect brakes and gears for proper function. Lubricate the chain periodically. Store the bike in a dry place, away from extreme temperatures. Consult a qualified mechanic for regular servicing.

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