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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L | 594 mm published | 420 mm published | 73.5 ° derived | 74.5 ° derived | 585 mm derived | 407 mm derived | 1023 mm published | 626 mm derived | 70 mm derived | 54.1 mm derived | 45 mm derived | green |
| All 3 consistency checks passed | ||||||||||||
| M | 570 mm published | 412 mm published | 73.5 ° derived | 75.0 ° derived | 565 mm derived | 407 mm derived | 1008 mm published | 611 mm derived | 70 mm derived | 54.1 mm derived | 45 mm derived | green |
| All 3 consistency checks passed | ||||||||||||
| S | 549 mm published | 403 mm published | 73.0 ° derived | 75.5 ° derived | 545 mm derived | 407 mm derived | 997 mm published | 601 mm derived | 70 mm derived | 57.2 mm derived | 45 mm derived | green |
| All 3 consistency checks passed | ||||||||||||
| XS | 532 mm published | 392 mm published | 72.0 ° derived | 76.0 ° derived | 525 mm derived | 407 mm derived | 995 mm published | 594 mm derived | 72 mm derived | 63.5 mm derived | 45 mm derived | red |
| 1 of 3 checks flagged — Wheelbase Reconciliation shows 5.2mm 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 Ridley Noah 3.0 geometry specification reconciles well across the size run, with one isolated wheelbase discrepancy on size XS. Stack and reach values reconcile within ±1mm engineering tolerance across all four sizes. The wheelbase discrepancy on size XS is a 5.2mm data inaccuracy in the published value; sizes S, M, and L reconcile within ±1mm engineering tolerance. The root cause of the XS wheelbase discrepancy cannot be determined from the published geometry data alone.