The Trek Marlin 6 Gen 3 is a mountain bike, built on a aluminium frame, listed at $1,349.99. An off-road bike for trails, with grippy tyres and trail-ready geometry.
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SizingWhat size Marlin 6 Gen 3 do I need?
cm
Enter your height to see the size Trek recommends.
Trek Marlin 6 Gen 3 size chart
Size
Rider height
In feet
Inseam
XS
145 to 155 cm
4 ft 9 in to 5 ft 1 in
69 to 73 cm
S
155 to 165 cm
5 ft 1 in to 5 ft 5 in
74 to 78 cm
M
165 to 177 cm
5 ft 5 in to 5 ft 10 in
79 to 83 cm
ML
173 to 180 cm
5 ft 8 in to 5 ft 11 in
81 to 86 cm
L
177 to 188 cm
5 ft 10 in to 6 ft 2 in
84 to 89 cm
XL
188 to 195 cm
6 ft 2 in to 6 ft 5 in
89 to 91 cm
2XL
195 to 203 cm
6 ft 5 in to 6 ft 8 in
91 to 97 cm
Rider heights from Trek's size chart (the brand chart for this model family). Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
Brand
Trek
Model year
2026
Category
Mountain
Frame
Aluminium
Brakes
Disc
Frame sizes
XS, S, M, ML, L, XL, 2XL
Price
$1,349.99, RRP AUD (Drift Bikes)
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M
Trek Marlin 6 Gen 3, size M. Published geometry, drawn to scale (BB drop or fork offset not published, typical value used).
Stack
609 mm
Reach
440 mm
Stack/reach
1.38
Head angle
69.5 deg
Seat angle
74 deg
Wheelbase
1163 mm
Chainstay
438 mm
BB drop
60 mm
GearingRatios
0.63lowest (climbing)
2.73highest (speed)
Very low climbing gear
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
Groupset
Shimano CUES U6000
Shifting
Mechanical
Drive
1x
Speeds
10
Crank
Shimano U4000 alloy
Chainrings
30
Cassette
Shimano CUES LG300 LinkGlide
Rear derailleur
Shimano CUES U6000 GS
Brakes
Shimano Deore MT200 hydraulic disc
Rotors
180/160mm
Wheelset
Bontrager Kovee double-wall alloy
Rim internal width
23 mm
Stock tyre
29x2.35
Max tyre clearance
61 mm
Tubeless
Yes
Fork material
RockShox Judy
Saddle
Bontrager Verse Short
Mounts
rack and kickstand mounts
SuspensionMTB detail
Front travel
100 mm
Fork
RockShox Judy Silver
Fork stanchions
30 mm
Wheel config
29
Dropper
TranzX JD-YSI34
Dropper travel
125 mm
Discipline
Trail
Suspension
hardtail
Bike DNAWhat the numbers say
Steering
A 69.5 deg head angle points to steeper, climbing and XC handling.
Climbing
Lowest ratio 0.63 is a very low climbing gear for steep or loaded climbs.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (2026 Trek Marlin 6 Gen 3 review build table + backfill 2026-09-27: 99spokes.com + backfill 2026-09-27: trekbikes.com), verified 2026-09-04. This is a specification analysis, not a physical ride review.