Marlin 7 Gen 3
Trek
Crosscountry
Marlin 7 Gen 3 is an alloy cross-country mountain bike (2025), by Trek, from the Marlin lineup. This model is best for riders who want a more active, performance-leaning off-road feel, with a setup that gives you a sporty, active riding position, with a surface profile that is best for smoother trails and efficient rolling. Standout strengths from the metrics include strong climbing friendliness for sustained uphill riding, strong value-for-money versus many similar bikes, and a balanced ride feel between comfort and directness. Compared with more specialized alternatives, the compromise is less emphasis on outright speed than speed-focused builds. Compare this bike on MatchBikes.com to similar cross-country models.
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" |




























































