2023 Specialized Diverge STR Pro vs 2025 Marin Gestalt Base
The 56 is the Marin Gestalt Base size closest to your 54 Specialized Diverge STR Pro. 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 Gestalt Base
Compared with the Specialized Diverge STR Pro in 54, the Marin Gestalt Base in 56 places the top of the head tube 8 mm higher and 4 mm further forward, relative to the bottom bracket. Its wheelbase is 6 mm longer, which can contribute to stability at speed.
- Frame stack
- +8 mm
- Higher front end
- Frame reach
- +4 mm
- Longer frame reach
- Wheelbase
- +6 mm
- Longer: steadier at speed
- Head angle
- +0.3°
- About the same head angle
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Specialized Diverge STR Pro, 54Marin Gestalt Base, 56Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Diverge STR Pro 54 | Marin Gestalt Base 56 | Difference |
|---|---|---|---|
| Reach | 383mm | 387 | +4 mm |
| Stack | 593mm | 601 | +8 mm |
| Head tube angle | 71.25° | 71.5 | +0.3° |
| Seat tube angle | 74° | 73.5 | −0.5° |
| Chainstay length | 429mm | 432 | +3 mm |
| Wheelbase | 1034mm | 1040 | +6 mm |
| BB drop | 85mm | 78 | −7 mm |
| BB height | 265mm | not listed | |
| Standover | 753mm | 775 | +22 mm |
| Seat tube length | 470mm | 520 | +50 mm |
| Fork length | 390mm | not listed | |
| Head tube length | 115mm | not listed | |
| Effective top tube | not listed | 565 |
Differences are the Marin Gestalt Base minus the Specialized Diverge STR Pro. Full charts: 2023 Specialized Diverge STR Pro, 2025 Marin Gestalt Base.
Where each sits in its class
Specialized Diverge STR ProMarin Gestalt Base
Each bike is ranked against the other gravel 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 | Specialized Diverge STR ProSTR Pro | Marin Gestalt BaseBase |
|---|---|---|
| Frame | Specialized Diverge FACT | Marin Gestalt |
| Fork | Specialized Future Shock 2.0 | 6061 Aluminum, Straight-Blade, Post-Mount Disc |
| Shifter | SRAM Force eTap AXS | Shimano Claris |
| Derailleur | SRAM X01 Eagle AXS | Shimano Claris |
| Cassette | SRAM GX Eagle | SunRace 8-Speed, 11-32T |
| Chain | SRAM X01 Eagle | KMC Z8 |
| Crankset | SRAM Force | FSA Tempo |
| Bottom bracket | SRAM DUB | Sealed Bearing Square Taper |
| Wheelset | Roval Terra CL | Marin Aluminum Double Wall, 21mm Inner, 22mm Tall |
| Tire | Specialized Tracer Pro 2BR | WTB Exposure Comp |
| Brake | SRAM Force | Tektro MD-C400 |
| Handlebar | Roval Terra | Marin Butted Alloy, Compact 16º Flared Drop |
| Stem | Specialized Future | not listed |
| Saddle | Specialized Power | Marin Beyond Road Concept Elite |
| Seatpost | not listed | Marin Alloy, 27.2mm |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
