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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 47 | 504 mm published | 368 mm published | 71.5 ° derived | 74.0 ° derived | 515 mm derived | 410 mm derived | 968 mm published | 568 mm published | 69 mm derived | 63.0 mm published | 48 mm published | yellow |
| 3 of 5 checks flagged — Stack Reconciliation shows 2.1mm discrepancy | ||||||||||||
| 51 | 528 mm published | 378 mm published | 71.5 ° derived | 74.0 ° derived | 532 mm derived | 410 mm derived | 986 mm published | 586 mm published | 69 mm derived | 63.0 mm published | 48 mm published | yellow |
| 3 of 5 checks flagged — Reach Reconciliation shows 2.1mm discrepancy | ||||||||||||
| 54 | 548 mm published | 387 mm published | 72.3 ° derived | 73.5 ° derived | 552 mm derived | 410 mm derived | 989 mm published | 589 mm published | 69 mm derived | 63.0 mm published | 43 mm published | yellow |
| 3 of 5 checks flagged — Reach Reconciliation shows 2.3mm discrepancy | ||||||||||||
| 56 | 563 mm published | 393 mm published | 72.3 ° derived | 73.5 ° derived | 562 mm derived | 410 mm derived | 999 mm published | 599 mm published | 69 mm derived | 63.0 mm published | 43 mm published | yellow |
| 2 of 5 checks flagged — Wheelbase Reconciliation shows 3.2mm discrepancy | ||||||||||||
| 58 | 582 mm published | 402 mm published | 72.3 ° derived | 73.0 ° derived | 582 mm derived | 410 mm derived | 1015 mm published | 614 mm published | 69 mm derived | 63.0 mm published | 43 mm published | yellow |
| 2 of 5 checks flagged — Wheelbase Reconciliation shows 2.1mm discrepancy | ||||||||||||
| 61 | 608 mm published | 409 mm published | 72.3 ° derived | 73.0 ° derived | 598 mm derived | 410 mm derived | 1030 mm published | 630 mm published | 69 mm derived | 63.0 mm published | 43 mm published | yellow |
| 3 of 5 checks flagged — Reach Reconciliation shows 3mm 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 BMC TeamMachine geometry shows systematic discrepancies across all six sizes in wheelbase (2.1–3.4mm) and front center (2.7–3.0mm), while reach shows minor discrepancies on three sizes (2.1–3.0mm) and stack shows a single minor discrepancy on size 47 (2.1mm). Trail reconciles within ±1mm engineering tolerance across all sizes. The simultaneous wheelbase and front center discrepancies indicate that the manufacturer's published ETT or reach values are not internally consistent with their published wheelbase and front center — the published WB and FC values are mutually consistent with each other, but the published ETT/reach implies a different BB horizontal position than what the published WB and FC imply.