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 | 410 mm published | 72.0 ° derived | 73.3 ° derived | 585 mm derived | 430 mm derived | 1058 mm published | 637 mm published | 65 mm derived | 63.1 mm derived | 50 mm published | yellow |
| 1 of 4 checks flagged — Front Center Reconciliation shows 2.6mm discrepancy | ||||||||||||
| M | 562 mm published | 404 mm published | 71.5 ° derived | 73.5 ° derived | 570 mm derived | 430 mm derived | 1048 mm published | 626 mm published | 65 mm derived | 66.4 mm derived | 50 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| S | 545 mm published | 394 mm published | 71.5 ° derived | 74.0 ° derived | 550 mm derived | 430 mm derived | 1031 mm published | 610 mm published | 67 mm derived | 66.4 mm derived | 50 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| XL | 607 mm published | 417 mm published | 72.0 ° derived | 73.0 ° derived | 602 mm derived | 430 mm derived | 1070 mm published | 648 mm published | 65 mm derived | 63.1 mm derived | 50 mm published | green |
| All 4 consistency checks passed | ||||||||||||
| XS | 526 mm published | 386 mm published | 70.5 ° derived | 75.5 ° derived | 522 mm derived | 430 mm derived | 1025 mm published | 605 mm published | 70 mm derived | 73.0 mm derived | 50 mm published | green |
| All 4 consistency checks passed | ||||||||||||
Overall consistency: yellow. 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 ULTRA-GRIT geometry specification reconciles within ±1mm engineering tolerance across all checks for sizes XS, S, M, and XL. Size L shows a 2.6mm data inaccuracy in the published front center value. The seat tube angle shows an unusually large step of 1.5° between sizes XS (75.5°) and S (74°) — while STA normally changes gradually across a size run, a jump of this magnitude may indicate a transcription anomaly; verification of the affected sizes is recommended.