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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 420 | 512 mm published | 370 mm published | 70.8 ° derived | 75.5 ° derived | 502 mm derived | 410 mm derived | 971 mm derived | 573 mm published | 74 mm derived | 72.5 mm derived | 43 mm published | green |
| All 3 consistency checks passed | ||||||||||||
| 455 | 525 mm published | 375 mm published | 71.6 ° derived | 75.3 ° derived | 513 mm derived | 410 mm derived | 974 mm derived | 575 mm published | 74 mm derived | 67.5 mm derived | 43 mm published | green |
| All 3 consistency checks passed | ||||||||||||
| 485 | 543 mm published | 382 mm published | 72.5 ° derived | 74.8 ° derived | 530 mm derived | 410 mm derived | 980 mm derived | 580 mm published | 72 mm derived | 61.8 mm derived | 43 mm published | green |
| All 3 consistency checks passed | ||||||||||||
| 510 | 562 mm published | 387 mm published | 72.9 ° derived | 74.5 ° derived | 543 mm derived | 410 mm derived | 987 mm derived | 587 mm published | 72 mm derived | 59.3 mm derived | 43 mm published | green |
| All 3 consistency checks passed | ||||||||||||
| 530 | 580 mm published | 394 mm published | 72.9 ° derived | 73.8 ° derived | 562 mm derived | 415 mm derived | 1004 mm derived | 600 mm published | 72 mm derived | 59.3 mm derived | 43 mm published | green |
| All 3 consistency checks passed | ||||||||||||
| 550 | 599 mm published | 402 mm published | 72.9 ° derived | 73.5 ° derived | 579 mm derived | 415 mm derived | 1017 mm derived | 614 mm published | 72 mm derived | 59.3 mm derived | 43 mm published | green |
| All 3 consistency checks passed | ||||||||||||
| 570 | 619 mm published | 409 mm published | 72.9 ° derived | 73.3 ° derived | 595 mm derived | 415 mm derived | 1031 mm derived | 627 mm published | 72 mm derived | 59.3 mm derived | 43 mm published | green |
| All 3 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 Colnago Steelnovo's published geometry reconciles within ±1mm engineering tolerance across all seven sizes for stack, reach, and front center. The forward-model calculations, anchored to the manufacturer's published Effective Top Tube values, produce deltas ranging from 0.0mm to 0.9mm — all well within the combined rounding and calculation precision of the system. This level of internal consistency indicates high-quality specification data.