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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Large | 593 mm published | 405 mm published | 70.5 ° derived | 72.4 ° derived | 584 mm derived | 425 mm derived | 1061 mm published | 641 mm published | 65 mm derived | 78.0 mm derived | 47 mm manual | red |
| 3 of 4 checks flagged — Reach Reconciliation shows 9.1mm discrepancy | ||||||||||||
| Medium | 564 mm published | 394 mm published | 70.5 ° derived | 72.5 ° derived | 563 mm derived | 425 mm derived | 1040 mm published | 620 mm published | 65 mm derived | 78.0 mm derived | 47 mm manual | red |
| 3 of 4 checks flagged — Reach Reconciliation shows 9mm discrepancy | ||||||||||||
| Small | 537 mm published | 383 mm published | 70.5 ° derived | 72.7 ° derived | 544 mm derived | 425 mm derived | 1020 mm published | 600 mm published | 65 mm derived | 78.0 mm derived | 47 mm manual | red |
| 3 of 4 checks flagged — Reach Reconciliation shows 5.8mm discrepancy | ||||||||||||
| X-large | 623 mm published | 416 mm published | 70.5 ° derived | 72.3 ° derived | 607 mm derived | 425 mm derived | 1084 mm published | 664 mm published | 65 mm derived | 78.0 mm derived | 47 mm manual | red |
| 3 of 4 checks flagged — Reach Reconciliation shows 7.9mm discrepancy | ||||||||||||
| X-Small | 523 mm published | 378 mm published | 70.5 ° derived | 72.9 ° derived | 532 mm derived | 425 mm derived | 1009 mm published | 589 mm published | 65 mm derived | 78.0 mm derived | 47 mm manual | red |
| 3 of 4 checks flagged — Reach Reconciliation shows 6.7mm discrepancy | ||||||||||||
Overall consistency: red. 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 Lauf Seigla geometry exhibits systematic discrepancies across all five sizes. Reach deviates from the ETT-anchored forward-model calculation by 5.8–9.1mm, wheelbase by 5.9–8.4mm, and front center by 2.3–5.1mm. Stack reconciles within ±1mm engineering tolerance across all sizes. The simultaneous reach and front center discrepancies indicate a mutual inconsistency among the published ETT, reach, and front center values — the BB position each implies differs significantly from the others.