3T2026
Primo
The 2026 3T Primo has frame geometry associated with a more aggressive position than most gravel bikes, with a steeper head angle. This page lists 4 geometry entries, with reach from 366 to 402 mm and stack from 517 to 604 mm. The Primo GRX 1X12 build comes with Shimano GRX RX822 SGS shifting and Fulcrum Rapid Red 900 wheels.
Geometry comparisons use 702 other gravel bikes with usable geometry in Quiver. They describe frame geometry, not your hand position or tested ride feel.
Keep a record of your Primo in Quiver. Start with the catalog details available for this bike, then keep track of the parts you change.
Published geometry is confirmed by at least two independent sources. Last checked .
Key facts
- Brand
- 3T
- Model
- Primo
- Model year
- 2026
- Type
- Gravel
- Geometry labels
- S, M, L, and XL
- Drivetrain
- Shimano GRX RX822 SGS
- Fork
- 3T Fango Primo2
- Wheels
- Fulcrum Rapid Red 900
- Last checked
Things to know
Geometry-based comparisons with gravel bikes, using measurements two or more sources agree on. They describe frame geometry, not a rider's hand position or tested ride feel.
- Slacker seat angle than 9 in 10 gravel bikes on Quiver: 72.5 degrees, where most sit near 73.5. In this comparison, 684 other gravel bikes have the same measurement on Quiver.
Geometry by size
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Reach(mm) | 366 | 378 | 390 | 402 |
| Stack(mm) | 517 | 546 | 575 | 604 |
| Head tube angle(°) | 69.5 | 71.1 | 72.5 | 72.5 |
| Seat tube angle(°) | 72.5 | 72.5 | 72.5 | 72.5 |
| Effective top tube(mm) | 529 | 550 | 571 | 592 |
| BB drop(mm) | 70 | 70 | 70 | 70 |
| Seat tube length(mm) | 463 | 490 | not yet verified | not yet verified |
| Head tube length(mm) | 101 | 125 | 150 | 180 |
Requested. Requests decide what we research next.
Own a Primo? Keep track of it in Quiver.
Start with the catalog details available for this bike, then keep track of the parts you change.
Free on the App StoreFree on Google Play Free to download. If you already have Quiver, the button opens it.Stock build
14 parts
Frame
Sources for specifications
Sources: rimrebellion.comSuspension
Sources for specifications
Sources: 3t.bike, racycles.comDrivetrain
Sources for specifications
Sources: 3t.bikeWheels & Tires
Brakes
Sources for specifications
Sources: road.cc, theproscloset.comCockpit
Sources for specifications
Sources: rimrebellion.com, road.ccSeatpost & Saddle
Sources for specifications
Sources: rimrebellion.com✓Verified, two or more sources agreeMFrom the manufacturer
Quick answers
- Which size or configuration labels have geometry for the 2026 3T Primo?
- This page lists geometry under 4 labels: S, M, L, and XL.
- What are the reach and stack of the 2026 3T Primo in size L?
- In size L, reach is 390 mm and stack is 575 mm.
- What is the head tube angle of the 2026 3T Primo?
- The head tube angle is 72.5 degrees in size L.
- What does the 2026 3T Primo GRX 1X12 ship with?
- The stock build includes 3T Primo2, 3T Fango Primo2, Shimano GRX RX610, and Fulcrum Rapid Red 900.
- Which years of the 3T Primo are on Quiver?
- Quiver has the 3T Primo for 2026.
Own a Primo? Keep track of it in Quiver.
Start with the catalog details available for this bike, then keep track of the parts you change.
Free on the App StoreFree on Google Play Free to download. If you already have Quiver, the button opens it.