Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Marlin 8 Gen 2
Value Guide market data · 2021 Trek Marlin 8 Gen 2
12-month trend
11%
Direction and magnitude, not judgment
vs. category average
5%
Holds value better than category avg
Price over time - 2021 Trek Marlin 8 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. 20212021$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 8 Gen 2 lineup
Overview
About this bike
2021 Trek Marlin 8 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
- Cable Management
- Bottom Bracket Cable Guide Trek Marlin 2019, Includes M5 Bolt, works as a Cable Stop for the front derailleur cable
- Fork
- Rock Shox Judy Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, 100mm QR, 80mm travel, SRAM Part Number 00.4020.414.000
- Frame
- Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR
Drivetrain
- Groupset
- SRAM SX
- Bottom Bracket
- SRAM Powerspline Bottom Bracket, 73x118mm, SRAM Part Number 00.6400.005.250
- Cassette
- SRAM Cassette PG1210 12-Speed 11-50 tooth Mounts to Shimano Freehub Body, SRAM Part Number 00.2418.095.000
- Chain
- SRAM Chain SX Eagle 12-Speed 114 Links with Powerlink, SRAM Part Number 00.2518.040.003
- Crank
- SRAM SX Eagle, 30T steel ring (49mm chainline), 155mm length, SRAM Part Number 00.6118.554.003
- Derailleur Hanger
- Rear Derailleur Hanger, Trek FX/MTB Two-Bolt, Black
- Rear Derailleur
- SRAM Rear Derailleur SX Eagle 12-Speed Black, SRAM Part Number 00.7518.154.000; SRAM Rear Derailleur SX Eagle 12-Speed Black
- Shifters
- SRAM Shifter SX Eagle 12-Speed Trigger Not Matchmaker Compatible Black, SRAM Part Number 00.7018.385.000
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, 31.8x690mm, 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, 31.6x300mm, 12mm Offset, Black; Bontrager alloy, 31.6mm, 12mm offset, 300mm length
- Spacer
- Headset Spacer, 10mm 1-1/8in, Black
- Stem
- Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 35mm length; Bontrager Comp Blendr Stem, 31.8x50mm, 7 Degree Rise, Black
Wheels & Tires
- Front Hub
- Hub Front Formula DC-20 28H 6 bolt disc, Black
- Front Skewer
- Formula Front Skewer, 100mm OLD, Black
- Front Wheel
- Bontrager 26'' Kovee TLR/DC-20 LW 6-bolt Disc, 100mm OLD, 28h, Black Spokes, Black Nipples, Black Rim Graphics
- 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
- Hub Rear Formula DC-22 28H 6 bolt disc, Black
- Rear Skewer
- Skewer Rear Formula, QR22, 135mm OLD, Black
- Rear Wheel
- Bontrager 26'' Kovee TLR/DC-22 LW 6-bolt Disc, Shimano Freehub, 135mm OLD, 28h, Black Spokes, Black Nipples, Black Rim Graphics
- Rim
- Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23mm width, presta valve
- Rim Strip
- Rim Strip 26 X 25mm
- Spokes
- Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 250mm Front Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 253mm Front Non-Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 254mm Rear Drive Side; Trek Approved 14g Round J-Bend, 6.2mm Elbow, Stainless Steel, Black, 255mm Rear Non-Drive Side
- Tire
- Maxxis Ardent Race, tubeless, EXO casing, folding bead, 60tpi, 26x2.40''
- Tube
- Innertube, 26x2.20-2.50, 32mm 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: Gloss Dnister Black, TK003-M; Paint Color: Gloss Alpine Blue, TK524-M
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.