2025 Giant Reign Advanced Pro 29 vs 2026 Marin Alpine Trail E1
The L is the Marin Alpine Trail E1 size closest to your L Giant Reign Advanced Pro 29. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Marin Alpine Trail E1
Compared with the Giant Reign Advanced Pro 29 in L, the Marin Alpine Trail E1 in L places the top of the head tube 12 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 21 mm longer, which can contribute to stability at speed.
- Frame stack
- +12 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +21 mm
- Longer: steadier at speed
- Head angle
- −1.1°
- Slacker: calmer steering
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Only the Giant Reign Advanced Pro 29 is drawn. The Marin Alpine Trail E1 numbers we have for size L are missing the seat angle.
Geometry side by side
| Measurement | Giant Reign Advanced Pro 29 L | Marin Alpine Trail E1 L | Difference |
|---|---|---|---|
| Reach | 488 | 490 | +2 mm |
| Stack | 631 | 643 | +12 mm |
| Head tube angle | 64.6 | 63.5 | −1.1° |
| Seat tube angle | 76.4 | not listed | |
| Chainstay length | 439 | 442 | +3 mm |
| Wheelbase | 1262 | 1283 | +21 mm |
| Standover | 781 | not listed | |
| Seat tube length | 464 | not listed | |
| Head tube length | 110 | not listed |
Differences are the Marin Alpine Trail E1 minus the Giant Reign Advanced Pro 29. Full charts: 2025 Giant Reign Advanced Pro 29, 2026 Marin Alpine Trail E1.
Where each sits in its class
Giant Reign Advanced Pro 29Marin Alpine Trail E1
Each bike is ranked against the other enduro bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Giant Reign Advanced Pro 29Advanced Pro 29 1 | Marin Alpine Trail E1E1 |
|---|---|---|
| Frame | Giant Reign | Marin Alpine Trail |
| Fork | Fox 38 Factory | X-Fusion Vengence |
| Rear shock | Fox Float X2 Factory | X-Fusion H3A Air |
| Shifter | SRAM GX Eagle AXS Rocker | Shimano SL-U6000-10R CUES |
| Derailleur | SRAM GX Eagle | Shimano CUES U6000 |
| Cassette | SRAM GX Eagle | Shimano CS-LG300-10 |
| Chain | SRAM GX Eagle | Shimano LG500 |
| Crankset | TruVativ Descendent | Marin Forged eMTB 34T 150mm |
| Bottom bracket | SRAM DUB GX | Marin Threaded |
| Wheelset | Giant TRX 2 | Marin double-wall alloy 29mm inner 32H tubeless |
| Tire | Maxxis Assegai, Maxxis Minion DHR II DD | Schwalbe Magic Mary |
| Brake | Shimano SLX M7120 | TRP DHR EVO Comp |
| Rotor | Shimano RT-66 | TRP 220mm front, 200mm rear |
| Handlebar | Giant Contact SLR | Marin Trail |
| Stem | Giant Contact SL | Marin CNC |
| Grips | Giant Tactal Pro Single | Marin Grizzly |
| Dropper post | TranzX dropper internal routing | Marin Remote 34.9mm |
| Saddle | Giant Romero SL | Marin Speed Concept |
| Chainring | not listed | Marin Single speed |
| Motor | not listed | Bosch Performance Line CX Gen 5 |
| Battery | not listed | Bosch PT800 Horizontal |
| Seatpost | not listed | TranzX 34.9mm diameter |
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