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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 48 | 505 mm published | 370 mm published | 71.0 ° derived | 74.5 ° derived | 512 mm derived | 425 mm derived | 990 mm published | 577 mm published | 79 mm derived | 62.0 mm published | 57 mm published | yellow |
| 1 of 5 checks flagged — Front Center Reconciliation shows 2.2mm discrepancy | ||||||||||||
| 51 | 530 mm published | 379 mm published | 71.5 ° derived | 74.0 ° derived | 532 mm derived | 425 mm derived | 999 mm published | 587 mm published | 79 mm derived | 62.0 mm published | 54 mm published | green |
| All 5 consistency checks passed | ||||||||||||
| 54 | 555 mm published | 388 mm published | 72.0 ° derived | 73.5 ° derived | 553 mm derived | 425 mm derived | 1010 mm published | 597 mm published | 76 mm derived | 62.0 mm published | 51 mm published | green |
| All 5 consistency checks passed | ||||||||||||
| 56 | 580 mm published | 397 mm published | 72.0 ° derived | 73.0 ° derived | 575 mm derived | 425 mm derived | 1028 mm published | 614 mm published | 76 mm derived | 62.0 mm published | 51 mm published | green |
| All 5 consistency checks passed | ||||||||||||
| 58 | 605 mm published | 406 mm published | 72.0 ° derived | 73.0 ° derived | 591 mm derived | 425 mm derived | 1046 mm published | 631 mm published | 74 mm derived | 62.0 mm published | 51 mm published | green |
| All 5 consistency checks passed | ||||||||||||
| 61 | 630 mm published | 415 mm published | 72.0 ° derived | 73.0 ° derived | 608 mm derived | 425 mm derived | 1063 mm published | 648 mm published | 74 mm derived | 62.0 mm published | 51 mm published | green |
| All 5 consistency checks passed | ||||||||||||
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 Aspero geometry reconciles within ±1mm engineering tolerance across all checks on five of six sizes. Size 48 shows a 2.2mm data inaccuracy in the published front center value. The manufacturer's use of intentionally different fork offsets across the size run (48mm–57mm) is an engineering choice to maintain consistent handling feel across a wide head tube angle range and does not represent a specification error.