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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 51 | 520 mm published | 371 mm published | 71.5 ° derived | 74.5 ° derived | 517 mm derived | 425 mm derived | 998 mm published | 581 mm published | 63 mm derived | 58.7 mm published | 51 mm published | yellow |
| 1 of 5 checks flagged — Trail Reconciliation shows 2.6mm discrepancy | ||||||||||||
| 54 | 540 mm published | 380 mm published | 71.5 ° derived | 74.0 ° derived | 536 mm derived | 425 mm derived | 1014 mm published | 597 mm published | 63 mm derived | 58.7 mm published | 51 mm published | yellow |
| 1 of 5 checks flagged — Trail Reconciliation shows 2.6mm discrepancy | ||||||||||||
| 56 | 560 mm published | 389 mm published | 71.5 ° derived | 73.5 ° derived | 556 mm derived | 425 mm derived | 1029 mm published | 612 mm published | 63 mm derived | 58.7 mm published | 51 mm published | yellow |
| 1 of 5 checks flagged — Trail Reconciliation shows 2.6mm discrepancy | ||||||||||||
| 58 | 580 mm published | 398 mm published | 72.0 ° derived | 73.0 ° derived | 574 mm derived | 425 mm derived | 1037 mm published | 620 mm published | 63 mm derived | 58.7 mm published | 48 mm published | yellow |
| 1 of 5 checks flagged — Trail Reconciliation shows 2.6mm discrepancy | ||||||||||||
Overall consistency: yellow. 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 Cervelo R5-CX geometry reconciles well across all four sizes for stack, reach, wheelbase, and front center — all checks pass within ±1mm engineering tolerance. Trail shows a systematic 2.6mm data inaccuracy in the published values across all sizes. The manufacturer publishes all primary geometric dimensions, enabling full independent verification of the specification.