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 | 588 mm published | 391 mm published | 73.0 ° derived | 73.5 ° derived | 565 mm derived | 415 mm derived | 1005 mm published | 600 mm published | 69 mm derived | 57.8 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| M | 568 mm published | 376 mm published | 73.0 ° derived | 73.5 ° derived | 545 mm derived | 415 mm derived | 985 mm published | 580 mm published | 69 mm derived | 57.8 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| S | 546 mm published | 374 mm published | 72.0 ° derived | 74.5 ° derived | 525 mm derived | 415 mm derived | 985 mm published | 580 mm published | 69 mm derived | 64.1 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| XL | 607 mm published | 405 mm published | 73.0 ° derived | 73.5 ° derived | 585 mm derived | 415 mm derived | 1026 mm published | 620 mm published | 69 mm derived | 57.8 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| XS | 523 mm published | 365 mm published | 71.0 ° derived | 75.0 ° derived | 505 mm derived | 415 mm derived | 978 mm published | 573 mm published | 69 mm derived | 70.5 mm derived | 45 mm published | green |
| All 4 consistency checks passed | ||||||||||||
Overall consistency: green. 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 Ribble ALLROAD SL R geometry specification reconciles within ±1mm engineering tolerance across all five sizes for stack, reach, wheelbase, and front center. The published geometry demonstrates internal consistency with the engine's first-principles calculations. The RideDNA Geometry Engine reconciliation checks confirm that the published values form a self-consistent geometric system, with all back-calculated dimensions reconciling within ±1mm.