2020 Trek Marlin 4

Modest component level aluminum frame crosscountry bike

View on trekbikes.com

2020 Trek Marlin 4
  • MSRP $480
  • Suspension Hardtail
  • Front Travel 75mm
  • Frame Aluminum
  • Fork 
  • Wheels 27.5″ Aluminum
  • Drivetrain 3 × 7
  • Groupset 
    Shimano Tourney

3 × 7 — 21 speed

2020 Trek Marlin 4
25 mph
Similar Bikes
26 mph

Similar bikes are easier to ride up hills than the 2020 Marlin 4.

The 2020 Marlin 4 won‘t keep up with similar bikes while riding downhill or sprinting.


Oh snap! This frame was drawn from the actual bike geometry measurements. Roll over the table below to highlight frame dimensions.

Stack 565574598598608626641
Reach 376385418434451466480
Stack/Reach Ratio1.501.491.431.381.351.341.34
Top Tube Length 543555595611631652670
Seat Tube Length 343368419444470521559
Seat Tube Angle73.573.573.573.573.573.573.5
Head Tube Length 90909090100120135
Head Tube Angle69.569.569.569.569.569.569.5
BB Drop 58485858585858
BB Height 297307297297297297297
Front Center 618632677693713735754
Chainstay Length 438438438438438438438
Wheelbase 1,0491,0661,1091,1251,1451,1671,186
Rake 46465151515150
Standover Height 705728743750747750783
🐐 Measurements listed in millimeters and degrees
FrameAlpha Silver Aluminum, rack & fender mounts, 135x5mm QR
ForkSR Suntour M-3030, coil spring, preload, 100mm QR, 75mm travel
Bottom BracketVP BC73, 73mm, threaded cartridge
HeadsetSemi-integrated, 1-1/8''
HandlebarBontrager Riser, 25.4mm, 30mm rise, 620mm width
SaddleBontrager Evoke 1, steel rails
GripsBontrager Satellite Plus
Front DerailleurShimano Tourney TY500, 34.9mm clamp, top swing, dual pull
Rear DerailleurShimano Tourney TY300, long cage, 34T max cog
ShiftersShimano Altus EF500, 7 speed
CrankShimano Tourney TY301, 42/34/24, 170mm length
CassetteShimano TZ21 14-28, 7 speed
ChainKMC Z51
BrakesTektro MD-M280 mechanical disc, 160mm rotor
RimsBontrager Connection, double-wall, 32-hole, 20mm width, schrader valve
Spokes14g stainless steel
Front HubFormula DC-20, alloy, 6-bolt, 5x100mm QR
Rear HubFormula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel, 135x5mm QR
TiresBontrager XR2, 29x2.20'' front, 29x2.00'' rear (13.5 & 15.5'': 27.5x2.20'')
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2020 Trek Marlin 4