Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2018 Trek Marlin 7
Value Guide market data · 2018 Trek Marlin 7
12-month trend
6%
Direction and magnitude, not judgment
vs. category average
15%
Holds value better than category avg
Price over time - 2018 Trek Marlin 7
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Marlin model years
2026$1,302 - $1,512▲ 87% vs. 2018
2025$1,116 - $1,296▲ 60% vs. 2018
2024$1,209 - $1,404▲ 73% vs. 2018
2023$1,209 - $1,404▲ 73% vs. 2018
2022$1,237 - $1,436▲ 77% vs. 2018
2021$1,116 - $1,296▲ 60% vs. 2018
2020$744 - $864▲ 7% vs. 2018
2019$735 - $853▲ 5% vs. 20182018$698 - $810Currently viewing
2017$698 - $8100% vs. 2018
2016$716 - $832▲ 3% vs. 2018
2015$660 - $767▼ 5% vs. 2018
2013$642 - $745▼ 8% vs. 2018
2012$632 - $734▼ 9% vs. 2018
2011$595 - $691▼ 15% vs. 20182018 Marlin 7 lineup
Overview
About this bike
2018 Trek Marlin 7 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- RockShox 30, coil spring, preload, TurnKey lockout, G2 Geometry w/51mm offset on 29ers, 100mm travel (13.5: 80mm travel)
- Frame
- Alpha Silver Aluminum w/semi-integrated head tube, rack & fender mounts, G2 Geometry on 29ers
Drivetrain
- Groupset
- Shimano Altus
- Bottom Bracket
- Sealed cartridge
- Chain
- KMC X9
- Chainrings
- 44/32/22
- Crankset
- Shimano M351
- Front Derailleur
- Shimano Altus
- Rear Cogs
- Shimano HG20, 11-34, 9 speed
- Rear Derailleur
- Shimano Acera M3000, Shadow
- Shifters
- Shimano Altus M370, 9 speed
Brakes
- Brakes
- Tektro M285 hydraulic disc
Cockpit
- Handlebar
- Bontrager alloy, 31.8mm, 15mm rise
- Headset
- 1-1/8" threadless, semi-integrated, semi-cartridge bearings
- Saddle
- Bontrager Evoke 1.5
- Seatpost
- Bontrager SSR, 2-bolt head, 27.2mm, 12mm offset
- Stem
- Bontrager alloy, 31.8mm, 7mm rise, Blendr compatible
- Grips
- Bontrager Race
Wheels & Tires
- Front Tire
- Bontrager XR2, 29x2.20" front, 29x2.00" rear (13.5 & 15.5: 27.5x2.20")
- Hubs
- Front: Formula DC20 alloy; Rear: Formula DC22 alloy
- Rims
- Bontrager Connection 32-hole double-walled
- Spokes
- Bontrager 14g
- Wheel Size
- 27.5-inch / 29-inch
Pedals
- Pedals
- Wellgo nylon platform
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.