Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Marlin 7 Gen 2
Value Guide market data · 2021 Trek Marlin 7 Gen 2
12-month trend
10%
Direction and magnitude, not judgment
vs. category average
7%
Holds value better than category avg
Price over time - 2021 Trek Marlin 7 Gen 2
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▲ 17% vs. 2021
2025$1,116 - $1,2960% vs. 2021
2024$1,209 - $1,404▲ 8% vs. 2021
2023$1,209 - $1,404▲ 8% vs. 2021
2022$1,237 - $1,436▲ 11% vs. 2021
2021$1,116 - $1,296Currently viewing
2020$744 - $864▼ 33% vs. 2021
2019$735 - $853▼ 34% vs. 2021
2018$698 - $810▼ 37% vs. 2021
2017$698 - $810▼ 37% vs. 2021
2016$716 - $832▼ 36% vs. 2021
2015$660 - $767▼ 41% vs. 2021
2013$642 - $745▼ 42% vs. 2021
2012$632 - $734▼ 43% vs. 2021
2011$595 - $691▼ 47% vs. 20212021 Marlin 7 Gen 2 lineup
Overview
About this bike
2021 Trek Marlin 7 Gen 2 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Bearing
- 3/16'' Loose Ball Bearings; 1/4'' Loose Ball Bearings
- Fork
- Rock Shox Suspension Fork Judy TK, Medium Coil Spring, 27.5'' 100mm Travel
- Frame
- Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR
Drivetrain
- Groupset
- Shimano Deore
- Bottom Bracket
- FSA Bottom Bracket, Square Taper, 73x122.5mm
- Cassette
- Shimano Deore Cassette. Item Number: CS-M4100, 10-Speed, 11-13-15-18-21-24-28-32-37-46T. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Chain
- KMC X10 10 Speed Chain
- Crank
- FSA Alpha Drive Crankset, Model CK-759T, 170mm, 1X11, 28t, 4 bolt 82mm BCD, Black
- Derailleur Hanger
- Rear Derailleur Hanger, Trek FX/MTB Two-Bolt, Black
- Rear Derailleur
- Shimano Deore Derailleur Rear. Item Number: RD-M5120, 11-Speed, Direct Attachment, SGS Cage, Max 46T, Shadow Plus design. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Shifters
- Shimano Deore Shifter. Item Number: SL-M4100-R, 10-Speed, Rapidfire Plus, Inner Cable Length: 2050mm, Without Optical Gear Display. (Visit si.shimano.com for compatibility, manuals and exploded views)
Brakes
- Brake Pad
- Brake Pad, Shimano B-Series Shape : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Brake Rotor
- Shimano Tourney Rotor. Item Number: SM-RT26-S, 160mm, 6-Bolt, For Resin Pad only. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Brake Set
- Shimano Acera Brake Set. Item Number: BL-MT200(L) - BR-MT200(F), Resin Pad (without Fin), Post Mount, Hose: SM-BH59-SS, Hose length: 750mm, Compatible brake pads: B03S (Resin). (Visit si.shimano.com for compatibility, manuals and exploded views); Shimano Acera Brake Set. Item Number: BL-MT200(R) - BR-MT200(R), Resin Pad (without Fin), Post Mount, Hose: SM-BH59-SS, Hose length: 1700mm, Compatible brake pads: B03S (Resin). (Visit si.shimano.com for compatibility, manuals and exploded views)
Cockpit
- Grips
- Bontrager Grips XR Trail Comp Black
- Handlebar
- Bontrager Approved Lowriser, 31.8x720mm, 5mm Rise, 9D Bend/4D Upsweep, Black
- Headset
- Headset 1.125 ZS VP A42 Black
- Headset Part
- Bontrager Headset Topcap, w/ Star Nut, Black
- Saddle
- Bontrager Saddle Arvada Steel Rails Medium Black
- Seatpost
- Bontrager Approved Seatpost, 31.6x330mm, 12mm Offset, Black
- Spacer
- Headset Spacer, 10mm 1-1/8in, Black
- Stem
- Bontrager Blendr Stem, 31.8x60mm, 7 Degree Rise, Black
Wheels & Tires
- Front Hub
- Hub Front Formula DC-20 32H 6 bolt disc, Black
- Front Skewer
- Formula Front Skewer, 100mm OLD, Black
- Front Wheel
- Front Wheel, Bontrager Connection 27.5'' with DC-20 hub, 32H, Presta Valve, 2019 Black Graphics; Front Wheel, Kovee TLR Rim, DC-20 6-bolt Disc Hub, 32H, Black
- Hub Axle
- Front Hub Rebuild Kit, for Approved Loose-Ball 6-Bolt Hubs; Rear Hub Rebuild Kit, for Approved Loose-Ball 6-Bolt Hubs
- Hub Body
- Freehub Body, 8/9/10-Speed Hyperglide, Bontrager Comp, FH-204 for OE hubs
- Nipple
- NIPPLE TREK APPROVED, 14G 12MM BRASS BLACK FINISH
- Rear Hub
- Formula DC-22 Rear Hub, 32H 6 bolt disc, Black
- Rear Skewer
- Skewer Rear Formula, QR22, 135mm OLD, Black
- Rear Wheel
- Bontrager Connection 27.5'' Rear Wheel, 32H, Shimano 8/9/10-Speed Freehub, 6-bolt Disc, Presta Valve, 2019 Black Graphics; Rear Wheel, Kovee TLR Rim, DC-22 6-bolt Disc QR Hub, 32H, Shimano MTB Freehub, Black
- Rim
- Bontrager Connection Rim, 27.5'' 32h Disc, Presta, Black
- Rim Strip
- Rim Strip 27.5 inch X 25mm, Plastic, Presta, Red
- Spokes
- Trek Approved, J-Bend, 14g, Stainless, Black; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 270mm Front Non-Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 270mm Rear Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 272mm Front Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 272mm Rear Non-Drive Side
- Tire
- Bontrager Tire XR2 Comp 27.5 x 2.20''; Bontrager Tire XR2 27.5x2.20
- Tube
- Bontrager Innertube 27.5x2.0-2.4 Presta Valve
Pedals
- Pedal
- VP Pedals 536C Platform Style, Black
Accessories
- Armor
- Trek Marlin 29 2019 Chainstay Armor
- Bar End Plug
- Bontrager Handlebar End Plug
- Bike Part Misc
- Trek Kickstand Mount Plug; Water Bottle Plug
- Cable Housing Set
- Bontrager Shift Housing 4mm Black
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Fastener
- Fastener Trek Derailleur Hanger Bolt M5x0.8x9mm Countersunk head Stainless Steel 3mm Hex Head Driver; M5 X 16mm Water Bottle Bolt, Stainless Steel, Black
- Seat Collar
- Seat Post Clamp 2012 Bontrager 36.4mm QR Black
- Touch-Up Paint
- Paint Color: Matte Anthracite, TK006-M; Paint Color: Matte Nautical Navy, TK525-S
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.