2020 Trek Marlin 5

Aluminium

£275

Frame checkedBexleyheath
Sell yours

This bike is a great price

£275
£250£350

Description

This is a lovely Trek bike Small frame size ideal for a 10-13yr old depending on their size. Both my boys have used this bike for school and occasional MTB. Recently fully serviced with rear tyre replaced. Some supe rficial scratches as you would expect but a lovely bike in great condition.

2020 Trek Marlin 5 in detail

This 2020 Trek Marlin 5 is an aluminium mountain bike. The seller describes the condition as excellent. It is located in Bexleyheath.

It has 27 gears. Brakes are hydraulic discs. Wheels are 27.5, with tubeless tyres. It is a hardtail, so front suspension only.

It was last serviced in July 2026. The sale includes proof of purchase. Pedals fitted are flat.

Details supplied by the seller.

Own a similar Trek?Sell now

Overview

  • Year2020
  • Frame sizeNot specified
  • ConditionExcellent
  • Frame materialAluminium
  • Wheel size27.5
  • Drivetrain27
  • Brake typeHydraulic disc
  • CategoryMountain bike
  • SuspensionFront suspension
  • FitKids'
  • ColourOrange
  • Tyre typeTubeless
  • Country of originUnited Kingdom
  • PedalsFlat

Condition by component

How the seller rates the main parts.

  • FrameVery Good
  • WheelsExcellent
  • BrakesExcellent
  • DrivetrainExcellent
  • TyresExcellent
What these ratings mean
Excellent
As new. No marks beyond light polishing swirls, and nothing worn far enough to think about replacing.
Very Good
Light cosmetic marks from normal use. Everything works as it should and nothing is near the end of its life.

Additional information

9 more details from the seller.

Known Issues

Some superficial scratches on the frame

This bike's history

Service history
On file
Last serviced
30 Jul 2026
Proof of purchase
Receipt on file
4 checks passed

Any questions?

Private Seller

Joined this year

Collection only
Bexleyheath

Address shared in chat once you agree on collection

Serviced 30 Jul 2026Receipt available

Your phone, email and address stay private until you share them.

No account needed. Add your email when you send and the seller can reply straight away.

View profile

Where this bike is

BexleyheathApproximate area, not the address
Collection onlyAgreed with the seller

Locations are shown to the nearest town. Arrange the exact meeting point with the seller.

Before you buy

Work through these before you commit.

About this advert

Spotted something fishy?

More bikes for sale

2018 Whyte 901 Hardtail Bike
9
£526
2018 Whyte 901 Hardtail Bike

It features a hardtail suspension, hydraulic disc brakes, and a 1x drivetrain. The bike is equipped with Maxxis tires,…

Great PriceHardtailHydraulic
Frame checkedFrame number checkedNo match on the registry we query, or our own theft reports. Checked 12 Aug 2026.How checks work →Lancaster
2020 Trek Roscoe 8
6
£743
2020 Trek Roscoe 8

aluminium frame, hydraulic disc brakes, finished in black.

ExcellentHardtailHydraulic
Frame checkedFrame number checkedNo match on the registry we query, or our own theft reports. Checked 28 Sept 2026.How checks work →Ceredigion Preseli
2021 Cotic SolarisMAX
20
£1,000
2021 Cotic SolarisMAX

Custom built mountain bike. Built in 2021. Only used on the trails 2/3 times and selling as I only use my gravel bike now!

Excellent29erFull susHydraulic
Frame checkedFrame number checkedNo match on the registry we query, or our own theft reports. Checked 24 Sept 2026.How checks work →Southampton
Lapierre XRM 6.9 2023 Carbon XC Race Full Suspension Mountain Bike / M / Very Good Condition!
16
£1,850
2023 Lapierre XRM 6.9

Ultra-lightweight, fast, and high-spec — the Lapierre XRM 6.9 2023 is a premium full carbon XC race full-suspension mountain bike in Very good used condition. The XRM 6.9 is Lapierre's top-level…

GoodL29er
Doncaster
Lapierre Spicy CF 6.9 2023 Full Suspension Bike / LARGE / Very Good Condition
16
£1,890
2023 Lapierre spicy 6.9

A high-spec Lapierre Spicy CF 6.9 2023 full-suspension carbon mountain bike in Very good overall condition and ready to ride. The Spicy CF 6.9 is Lapierre's flagship enduro weapon — built around an…

Excellent29er
Doncaster

Explore more bikes

More Trek bikes

Shop the full range

Trek Mtb

Same brand & type

Mtb bikes for sale

All brands & prices

Mtb under £350

Similar budget

Bikes in Bexleyheath

Near you

Excellent condition

Similar quality

Trek Marlin 5 pros and cons

Drawn from what the seller filled in on this advert. Anything they left blank is listed under Cons, so you know what to ask before you travel.

Pros

  • Stolen check on this frame came back clear
  • Frame number recorded, so it can be checked against a stolen-bike registry and rider-filed theft reports
  • Seller says the original proof of purchase is available

Cons

Used Mountain Bikes Buyer's Guide UK

Hardtail 2019+ £500-£1,200, full-suspension £1,500-£4,000.

Author: Cyclesite editorial team

Reviewed 29 April 2026 · 16 min read

Read the guide
2020 Trek Marlin 5

Before you make an offer

Two quick checks make a used-bike purchase far safer: confirm the price is fair against the real UK market, and confirm the frame number isn’t flagged as stolen. Both are free and take seconds.

Free bike valuation

See what any bike is worth, priced from real UK market data.

Free stolen bike check

Check any bike against a stolen-bike registry and rider-filed theft reports: free, no account.

Buying a bike safely

How to buy used with confidence and avoid the common scams.