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 | 520 mm published | 362 mm published | 71.0 ° derived | 74.0 ° derived | 511 mm derived | 425 mm derived | 989 mm published | 572 mm published | 80 mm derived | 62.7 mm derived | 55 mm published | red |
| 1 of 4 checks flagged — Front Center Reconciliation shows 5.1mm discrepancy | ||||||||||||
| 52 | 535 mm published | 371 mm published | 71.0 ° derived | 74.0 ° derived | 524 mm derived | 425 mm derived | 1003 mm published | 586 mm published | 80 mm derived | 62.7 mm derived | 55 mm published | yellow |
| 1 of 4 checks flagged — Front Center Reconciliation shows 4.9mm discrepancy | ||||||||||||
| 54 | 555 mm published | 377 mm published | 72.0 ° derived | 74.0 ° derived | 536 mm derived | 425 mm derived | 1007 mm published | 589 mm published | 80 mm derived | 56.2 mm derived | 55 mm published | red |
| 1 of 4 checks flagged — Front Center Reconciliation shows 5.4mm discrepancy | ||||||||||||
| 56 | 575 mm published | 384 mm published | 72.0 ° derived | 73.5 ° derived | 554 mm derived | 425 mm derived | 1020 mm published | 603 mm published | 80 mm derived | 56.2 mm derived | 55 mm published | yellow |
| 1 of 4 checks flagged — Front Center Reconciliation shows 4.6mm discrepancy | ||||||||||||
| 58 | 600 mm published | 392 mm published | 72.0 ° derived | 73.5 ° derived | 570 mm derived | 425 mm derived | 1036 mm published | 619 mm published | 80 mm derived | 56.2 mm derived | 55 mm published | red |
| 1 of 4 checks flagged — Front Center Reconciliation shows 5.2mm discrepancy | ||||||||||||
| 61 | 625 mm published | 400 mm published | 72.0 ° derived | 73.5 ° derived | 585 mm derived | 425 mm derived | 1052 mm published | 635 mm published | 80 mm derived | 56.2 mm derived | 55 mm published | yellow |
| 1 of 4 checks flagged — Front Center Reconciliation shows 4.8mm 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 Allied Echo geometry audit shows systematic front center discrepancies across all six sizes, ranging from 4.6mm to 5.4mm. Stack, reach, and wheelbase reconcile within ±1mm engineering tolerance. The front center discrepancies indicate that the published ETT values are internally inconsistent with the published reach and front center values — the BB position each implies differs significantly from the others.