Marlin 5 Gen 3
Trek
Crosscountry
Marlin 5 Gen 3 is an alloy cross-country mountain bike (2025), by Trek, from the Marlin lineup. Rider-wise, it fits riders who want a more active, performance-leaning off-road feel, leaning toward a sporty, active riding position, with a surface profile that is best for smoother trails and efficient rolling. Based on the metrics, key strengths are strong value-for-money versus many similar bikes, strong climbing friendliness for sustained uphill riding, and good fit flexibility for dialing in rider position. That said, compared with more specialized alternatives, the compromise is less emphasis on outright speed than speed-focused builds. Use MatchBikes.com to compare this bike with nearby cross-country options.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
Geometry
| Measurement | 14.5" | 15.5" | 17.5" | 18.5" | 19.5" | 21.5" |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.444 mm | 1.378 mm | 1.384 mm | 1.349 mm | 1.315 mm | 1.287 mm |
| Bottom Bracket Height | 313 mm | 313 mm | 308 mm | 308 mm | 308 mm | 308 mm |
| Front Center | 663 mm | 692 mm | 732 mm | 749 mm | 765 mm | 798 mm |
| Rake | 42 mm | 42 mm | 46 mm | 46 mm | 46 mm | 46 mm |
| Trail | 110 mm | 110 mm | 110 mm | 110 mm | 110 mm | 110 mm |
| Stack | 563 mm | 572 mm | 609 mm | 614 mm | 618 mm | 637 mm |
| Reach | 390 mm | 415 mm | 440 mm | 455 mm | 470 mm | 495 mm |
| Top Tube Length | 551 mm | 579 mm | 615 mm | 631 mm | 647 mm | 678 mm |
| Seat Tube Angle | 74 ° | 74 ° | 74 ° | 74 ° | 74 ° | 74 ° |
| Seat Tube Length | 340 mm | 370 mm | 420 mm | 435 mm | 450 mm | 500 mm |
| Head Tube Angle | 66.5 ° | 66.5 ° | 66.5 ° | 66.5 ° | 66.5 ° | 66.5 ° |
| Head Tube Length | 90 mm | 100 mm | 105 mm | 110 mm | 115 mm | 135 mm |
| Chainstay Length | 433 mm | 433 mm | 438 mm | 438 mm | 438 mm | 438 mm |
| Wheelbase | 1092 mm | 1121 mm | 1163 mm | 1180 mm | 1197 mm | 1230 mm |
| Bottom Bracket Drop | 45 mm | 45 mm | 60 mm | 60 mm | 60 mm | 60 mm |
| Standover Height | 658 mm | 692 mm | 747 mm | 759 mm | 771 mm | 791 mm |
| Wheels | 27" | 27" | 29" | 29" | 29" | 29" |




























































