Ribble ULTRA-RACE 2026 geometry

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.

Ribble ULTRA-RACE 2026 geometry chart

Source: Manufacturer geometry source

Published geometry by size

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.

SizeStackReachHTASTAETTChainstayWheelbaseFront centerBB dropTrailFork offsetAudit context
L 571 mm published399 mm published73.0 ° derived73.3 ° derived570 mm derived410 mm derived1004 mm published603 mm published68 mm derived57.2 mm derived45 mm published green
All 4 consistency checks passed
M 551 mm published388 mm published72.5 ° derived73.5 ° derived550 mm derived410 mm derived991 mm published591 mm published68 mm derived60.3 mm derived45 mm published green
All 4 consistency checks passed
S 530 mm published383 mm published72.0 ° derived74.0 ° derived535 mm derived410 mm derived985 mm published584 mm published68 mm derived63.5 mm derived45 mm published green
All 4 consistency checks passed
XL 591 mm published404 mm published73.3 ° derived73.0 ° derived585 mm derived410 mm derived1012 mm published612 mm published68 mm derived55.3 mm derived45 mm published green
All 4 consistency checks passed
XS 509 mm published379 mm published71.0 ° derived74.5 ° derived520 mm derived410 mm derived993 mm published593 mm published68 mm derived59.2 mm derived55 mm published green
All 4 consistency checks passed
XXS 504 mm published370 mm published71.0 ° derived75.0 ° derived505 mm derived410 mm derived983 mm published582 mm published68 mm derived59.2 mm derived55 mm published green
All 4 consistency checks passed

Audit context

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 ULTRA-RACE geometry reconciles within ±1mm engineering tolerance across all six sizes for stack, reach, wheelbase, and front center. The manufacturer's published specification is internally consistent with the RideDNA engine's forward-model calculations. The RideDNA Geometry Engine reconciliation checks confirm internal geometric consistency across all sizes, with all five back-calculation checks passing green.

Next steps

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