Trek's Marlin is a versatile mountain bike, ideal for anyone starting out in the sport or looking for a bike that can be used for commuting or light trail centre duties.
Wheel sizes grow with the bikes, with XS and Small using 27.5 wheels and the rest of the range using 29" wheels. The XS size has a curved top tube for more stand over clearance, and all sizes have mounts ready for stands or racks.
There's a good range of well-specced price points, and all models share the same trail-friendly frame with internal cable routing and modern geometry.
Trek Marlin Geometry & Sizing

Trek Marlin Geometry |
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Sizes in MM | XS (27.5) | S (27.5) | M (29) | ML (29") | L (29") | XL ( 29") | XL ( 29") |
A: Stack | 563 | 572 | 602 | 602 | 611 | 630 | 630 |
B: Reach | 390 | 415 | 418 | 434 | 451 | 466 | 480 |
C: Head Tube Angle |
66.5° | 69.5° | |||||
D: Head Tube Length |
90 | 100 | 90 | 90 | 100 | 120 | 120 |
E: Effective Seat Tube Angle |
74° | 73° | |||||
F: Seat Tube Length |
340 | 370 | 419 | 444 | 470 | 521 | 559 |
G: Effective Top Tube |
551 | 579 | 602 | 618 | 638 | 659 | 673 |
H: BB Height | 313 | 310 | 311 | ||||
I: BB Drop | 45 | 58 | |||||
J: Chainstay Length | 433 | 438 | |||||
K: Wheelbase | 1092 | 1121 | 1100 | 1116 | 1137 | 1159 | 1173 |
L: Standover | 658 | 692 | 748 | 758 | 757 | 769 | 804 |
M: Fork Offset | 42 | 46 | |||||
Seatpost Diameter | 31.9 |
Size | Rider Height | |
---|---|---|
XS | 145cm-155cm | 4'9"-5'1" |
S | 155cm-165cm | 5'1"-5'5" |
M | 165cm–177cm | 5'5"-5'10" |
L | 177cm–188cm | 5'10"-6'2" |
XL | 188cm–195cm | 6'2"'-6'5" |
XXL | 195cm–203cm | 6'5"'-6'8" |