2025 Marin Gestalt Base vs 2025 3T Exploro Ultra 700c
The 51 is the 3T Exploro Ultra 700c size closest to your 50 Marin Gestalt Base. 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 3T Exploro Ultra 700c
Compared with the Marin Gestalt Base in 50, the 3T Exploro Ultra 700c in 51 places the top of the head tube 10 mm lower and 5 mm further back, relative to the bottom bracket.
- Frame stack
- −10 mm
- Lower front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- −1.5°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Marin Gestalt Base is drawn. The 3T Exploro Ultra 700c numbers we have for size 51 are missing the seat angle, chainstay length and wheelbase.
Geometry side by side
| Measurement | Marin Gestalt Base 50 | 3T Exploro Ultra 700c 51 | Difference |
|---|---|---|---|
| Reach | 367 | 362 | −5 mm |
| Stack | 552 | 542 | −10 mm |
| Head tube angle | 71 | 69.5 | −1.5° |
| Seat tube angle | 74.5 | not listed | |
| Effective top tube | 520 | not listed | |
| Chainstay length | 432 | not listed | |
| Wheelbase | 1008 | not listed | |
| BB drop | 78 | 79 | +1 mm |
| Standover | 714 | not listed | |
| Seat tube length | 460 | not listed | |
| Fork length | not listed | 375 | |
| Head tube length | not listed | 142 |
Differences are the 3T Exploro Ultra 700c minus the Marin Gestalt Base. Full charts: 2025 Marin Gestalt Base, 2025 3T Exploro Ultra 700c.
Where each sits in its class
Marin Gestalt Base3T Exploro Ultra 700c
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 | Marin Gestalt BaseBase | 3T Exploro Ultra 700cGRX 1X12 700c |
|---|---|---|
| Frame | Marin Gestalt | 3T Exploro Ultra |
| Fork | 6061 Aluminum, Straight-Blade, Post-Mount Disc | Fango Ultra |
| Shifter | Shimano Claris | Shimano GRX Di2 |
| Derailleur | Shimano Claris | Shimano GRX Di2 |
| Cassette | SunRace 8-Speed, 11-32T | Shimano XT M8100 |
| Chain | KMC Z8 | not listed |
| Crankset | FSA Tempo | Shimano GRX FC-RX600 |
| Bottom bracket | Sealed Bearing Square Taper | not listed |
| Wheelset | Marin Aluminum Double Wall, 21mm Inner, 22mm Tall | Fulcrum Rapid 900 |
| Tire | WTB Exposure Comp | variable |
| Brake | Tektro MD-C400 | Shimano GRX Di2 |
| Handlebar | Marin Butted Alloy, Compact 16º Flared Drop | 3T variable |
| Seatpost | Marin Alloy, 27.2mm | 3T round |
| Saddle | Marin Beyond Road Concept Elite | variable |
| Stem | not listed | 3T Apto Stealth |
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