To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
The Marlin 7 is your best friend on the trail and wherever else you roll thanks to its confidence-boosting trail geometry.
The Marlin 7 is your best friend on the trail and wherever else you roll thanks to its confidence-boosting trail geometry.
Trek

Trek Marlin 7 Gen 3 Hardtail Mountain Bike 2025 in Keswick Green

£900.00 £1,100.00 18% off
Earn
in Customer Rewards when you buy this item today
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Trek Marlin 7 Gen 3 Hardtail Mountain Bike 2025 in Keswick Green

Season:2025Sale

Brand:Trek

Code:41217GRN

The Marlin 7 is your best friend on the trail and wherever else you roll thanks to its confidence-boosting trail geometry. It finds the perfect balance between price and performance with an upgraded RockShox suspension fork that makes quick work of rocks and bumps in your path and the huge gearing range of a SRAM 12-speed SX Eagle drivetrain.

You want a go-anywhere trail bike that's got upgrades where it matters most, but won't break the bank. You want to build skills on the trail, and need a bike with confidence-inspiring geometry and upgraded components that can keep up with your progress.

A lightweight aluminium frame with modern trail riding geometry and internal routing that keeps cables protected and the bike looking sleek. An upgraded RockShox suspension fork smooths out rowdy trails, 12-speed SRAM SX Eagle shifting and the serious stopping power of hydraulic disc brakes.

The Marlin 7 is the go-to trail bike for those wanting to build skills on the singletrack and get the right bang for their buck with upgraded suspension and confidence-inspiring geometry.

Key Features & Benefits:

  • RockShox Judy Silver Suspension Fork:For robust comfort and control.
  • Shimano Hydraulic disc brakes:For reliable stopping in all conditions.
  • SRAM SX Eagle 12 speed gears:To get you up the steepest of hills with a simple 1-by setup.
Please Note: XS frame size has a curved top tube and a lower standover height that makes it easier for smaller riders to mount and dismount. XS and S come with a 27.5" wheel and tyre, and XXS with a 26".

Full Specification:

  • Frame:Alpha Silver Aluminium, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew
  • Rear Shock (If Applicable):N/A
  • Fork: RockShox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 46mm offset for 29" wheel, 100mm QR, 100mm travel
  • Number of Gears:12
  • Gear Shifters:SRAM SX Eagle, 12-speed
  • Chainset:SRAM SX Eagle, 30T steel ring, 49 mm chainline, 155 - 175 mm length
  • Chainrings:30T
  • Rear Cassette:SRAM PG-1210 Eagle, 11-50, 12-speed
  • Chain:SRAM SX Eagle, 12-speed
  • Front Derailleur:N/A
  • Rear Derailleur:SRAM SX Eagle
  • Bottom Bracket:Truvativ Powerspline, 73 mm, threaded cartridge, 118 mm spindle
  • Pedals:VP-536 nylon platform
  • Rims:Bontrager Kovee, double-wall, Tubeless-Ready, 28-hole, 23 mm width, Presta valve
  • Front Hub:Formula DC-20 LW, alloy, 6-bolt, 5x100 mm QR
  • Rear Hub:Formula DC-22LW, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR
  • Front Tyre:Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 29x2.40" (26x2.40" for XXS, 27.5x2.40")
  • Rear Tyre:Maxxis Ardent, tubeless ready, EXO casing, folding bead, 60tpi, 29x2.40" (26x2.40" for XXS, 27.5x2.40")
  • Brakes:Shimano MT200 hydraulic disc
  • Handlebars:Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
  • Handlebar Grips:Bontrager XR Trail Comp, nylon lock-on
  • Headset:Semi-integrated, 1-1/8"
  • Stem:Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 - 70 mm length
  • Saddle:Bontrager Verse Short, stainless steel rails
  • Seatpost:TranzX JD-YSP18, 150 mm travel, internal routing, 31.6 mm, 470 mm length
  • Accessories:N/A
  • Weight:M - 14.85 kg / 32.74 lbs (with TLR sealant, no tubes)
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Sizing Chart for Trek Marlin Gen 3 Hardtail Mountain Bike

The smaller frame sizes (XXS & XS) have a curved top tube and a lower standover height that makes it easier for smaller riders to mount and dismount, so you get a bike perfectly moulded to your size. XXS comes with 26" wheel, XS and S come with 27.5" wheel.
Frame SizeRider Height (cm)Rider Height (')Inseam (cm)Inseam (")
XXS135 - 1454'5" - 4'9"64 - 6825 - 27
XS145 - 1554'9" - 5'1"69 - 7327 - 29
S155 - 1655'1" - 5'5"74 - 7829 - 31
M165 - 1765'5" - 5'9"79 - 8331 - 33
M/L173 - 1805'8" - 5'11"81 - 8632 - 34
L177 - 1885'10" - 6'2"84 - 8934 - 35
XL188 - 1956'2" - 6'5"89 - 9135 - 36
XXL195 - 2036'5" - 6'8"91 - 9736 - 38

Geometry for Trek Marlin

Frame Size Number13.514.515.517.518.519.521.523
Frame Size LetterXXSXSSMMLLXLXXL
Wheel Size26"27.5"27.5"29"29"29"29"29"
A - Seat Tube3234374243.5455054
B - Seat Tube Angle74.0°73.8°73.8°73.4°73.4°73.4°73.4°73.4°
Effective Tube Angle74.0°74.0°74.0°74.0°74.0°74.0°74.0°74.0°
C - Head Tube Length991010.51111.513.515
D - Head Angle66.5°66.5°66.5°66.5°66.5°66.5°66.5°66.5°
E - Effective Top Tube52.155.157.961.563.164.767.870.7
F - Bottom Bracket Height30.231.331.330.830.830.830.830.8
G - Bottom Bracket Drop3.84.54.566666
H - Chainstay Length43.343.343.343.843.843.843.843.8
I - Offset44.24.24.64.64.64.64.6
J - Trail10.411111111111111
K - Wheelbase106109.2112.1116.3118119.7123126.1
L - Standover6565.869.274.775.977.179.181.6
M - Frame Reach36.53941.54445.54749.552
N - Frame Stack54.456.357.260.961.461.863.765.1

Warranty Information for Trek:

Lifetime warranty on Frame sets (frame and rigid fork), main frame and full suspension swing arms for the lifetime of the original owner, and Bontrager wheels with carbon rims.

2-year warranty on Rear suspension linkage components, including bearings, rocker link and accompanying hardware and components, Bontrager wheels with alloy rims, Paint and transfers.

For full warranty policy please visit trekbikes.com

Sizing Information
Professional Opinion
Question(s) answered about Trek Marlin 7 Gen 3 Hardtail Mountain Bike 2025 in Keswick Green
Ask a question
Question(s) asked regarding Trek Marlin 7 Gen 3 Hardtail Mountain Bike 2025 in Keswick Green

Ask a question

Your name
Your email address
Your phone number
Your question
Submit Question  Close
Home Mountain Biking Bikes Trek Mountain Bikes