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 | 595 mm published | 419 mm published | 71.5 ° derived | 74.0 ° derived | 590 mm derived | 425 mm derived | 1064 mm published | 650 mm derived | 75 mm derived | 68.1 mm derived | 50 mm derived | green |
| All 3 consistency checks passed | ||||||||||||
| M | 571 mm published | 406 mm published | 71.5 ° derived | 74.0 ° derived | 570 mm derived | 425 mm derived | 1043 mm published | 629 mm derived | 75 mm derived | 68.1 mm derived | 50 mm derived | green |
| All 3 consistency checks passed | ||||||||||||
| S | 550 mm published | 392 mm published | 71.0 ° derived | 74.0 ° derived | 550 mm derived | 425 mm derived | 1027 mm published | 613 mm derived | 75 mm derived | 71.4 mm derived | 50 mm derived | green |
| All 3 consistency checks passed | ||||||||||||
| XL | 619 mm published | 432 mm published | 71.5 ° derived | 73.5 ° derived | 615 mm derived | 425 mm derived | 1085 mm published | 671 mm derived | 75 mm derived | 68.1 mm derived | 50 mm derived | green |
| All 3 consistency checks passed | ||||||||||||
| XS | 536 mm published | 376 mm published | 71.0 ° derived | 74.5 ° derived | 525 mm derived | 425 mm derived | 1006 mm published | 593 mm derived | 75 mm derived | 71.4 mm derived | 50 mm derived | green |
| All 3 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 Ridley ASTR gravel geometry reconciles within ±1mm engineering tolerance across all five sizes for stack, reach, and wheelbase. The manufacturer has not published fork axle-to-crown length, head tube length, or trail values — the engine derived fork A2C via two-pass consensus refinement and computed trail using the manufacturer's stated 700 x 50c reference tire. An accurate and complete geometry specification from the manufacturer — including fork axle-to-crown length, head tube length, and trail — would provide greater clarity and enable full independent geometric verification.