A size-by-size geometry profile with manufacturer provenance and RideDNA consistency-audit context. Use the complete table to compare fit and handling before opening the interactive tools.
Source: Manufacturer geometry source
Provenance: published is present in the manufacturer data; derived is calculated by RideDNA; manual is a staff-entered reference rather than a manufacturer-chart value. “Not published” means the manufacturer did not provide a value for that size.
| Size | Stack | Reach | HTA | STA | ETT | Chainstay | Wheelbase | Front center | BB drop | Trail | Fork offset | Audit context |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 47cm | 535 mm published | 362 mm published | 70.0 ° derived | 74.5 ° derived | 510 mm derived | 430 mm derived | 1000 mm published | 581 mm published | 75 mm derived | 81.7 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| 50cm | 556 mm published | 366 mm published | 70.5 ° derived | 74.0 ° derived | 525 mm derived | 430 mm derived | 1007 mm published | 589 mm published | 75 mm derived | 78.3 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| 53cm | 577 mm published | 374 mm published | 71.0 ° derived | 73.5 ° derived | 545 mm derived | 430 mm derived | 1017 mm published | 600 mm published | 75 mm derived | 75.0 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| 56cm | 592 mm published | 384 mm published | 71.5 ° derived | 73.0 ° derived | 565 mm derived | 430 mm derived | 1030 mm published | 611 mm published | 70 mm derived | 71.7 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| 59cm | 613 mm published | 398 mm published | 72.0 ° derived | 73.0 ° derived | 585 mm derived | 430 mm derived | 1045 mm published | 626 mm published | 70 mm derived | 68.4 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| 62cm | 634 mm published | 405 mm published | 72.5 ° derived | 72.5 ° derived | 605 mm derived | 430 mm derived | 1054 mm published | 634 mm published | 70 mm derived | 65.1 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
Overall consistency: green. This context is shown alongside the table so a rider can distinguish a complete published specification from a value that RideDNA had to derive or could not independently verify.
The Niner RLT 9 RDO gravel bike demonstrates excellent internal geometric consistency across all six sizes. All four primary checks — stack, reach, wheelbase, and front center — reconcile within ±1mm engineering tolerance across the entire size run. The published geometry is internally self-consistent and aligns closely with the engine's first-principles forward-model calculations.