Does similar frame stack and reach mean two bikes fit the same?

No. Stack and reach locate the top of the head tube, not your hands or saddle. Headset covers, spacers, stem, bars, brake lever position, saddle adjustment and crank length also matter. Handling and suspension setup can differ even when frame stack and reach match.

How are closest geometry results ranked?

A size must be within your stack tolerance AND your reach tolerance, including the limits. Results are then sorted by the square root of stack difference squared plus reach difference squared, in millimetres. Both axes have equal weight. This distance is not a fit score or an approval to buy.

Which bikes and model years can I search?

Only the bounded BikeSize geometry catalog with official manufacturer chart, PDF or specification provenance is searched. High-confidence records are included by default; medium-confidence official records are optional. Each result preserves its source year range or generation scope. A generation-only archive is not confirmation for a particular model year. Low-confidence, migrated and missing-dimension rows are excluded.

Why are there no results within my tolerances?

The current catalog is small, so no result does not mean no suitable bike exists. Check your category and dimensions, review official manufacturer charts, or deliberately widen your limits. The finder does not silently widen them or replace missing stack and reach with estimates.

Can the finder calculate target stack and reach from my height?

No. Enter known frame dimensions or a target agreed with a fitter. This tool does not convert height, inseam or symptoms into a precise frame recommendation. Before buying, check the exact model and generation, standover, saddle-height range, component adjustment limits and a test ride.

Closest bike geometry finder

Find frame sizes near your target stack and reach in BikeSize’s small manufacturer-sourced catalog. Set tolerances, see ranked deltas and check source scope.

Tool published November 4, 2026. Each chart's capture and review dates appear with its size rows. This is a candidate shortlist, not a body-to-bike fit prescription.

What this search does

Start with known frame stack and reach, or a target agreed with a fitter. A size must meet both of your limits. Ranking uses √(stack delta² + reach delta²), with both measurements in mm and equal weight. Tolerances are your search choices, not medically or mechanically approved fit margins.

This discovers candidates across the bounded catalog. Once you have two frames in mind, use geometry comparison. To investigate an actual hand and saddle position, use fit transfer. Enter the candidate dimensions there; links do not automatically transfer a fit.

Official chart, PDF and spec-sheet records are eligible; migrated and low-confidence data are not. High confidence describes source capture, not certainty of fit. A source may cover a year range or only a generation. Generation-only rows stay generation-only: confirm the specific bike with its manufacturer before buying.

Catalog coverage and manufacturer sources

14 geometry records; 95 usable size rows before category and confidence filters. The market is much larger. Only stack and reach are used for matching. Any dimension missing from a size row remains unknown, never zero.

Basso Astra official product geometry
Scope: undated. high source confidence; BikeSize reviewed 2026-10-25.
Basso Palta official geometry, Palta II page
Scope: undated. high source confidence; BikeSize reviewed 2026-10-25.
Canyon Aeroad CFR eTap official geometry, product 3950
Scope: undated. high source confidence; BikeSize reviewed 2026-11-04.
Canyon Endurace CF 7 official geometry, product 4274
Scope: undated. high source confidence; BikeSize reviewed 2026-11-04.
Cervélo S5 2025 official support geometry
Scope: 2025. high source confidence; BikeSize reviewed 2026-11-04.
Colnago V4 official product geometry
Scope: undated. high source confidence; BikeSize reviewed 2026-10-25.
Pinarello new F5 105 Di2 official geometry
Scope: undated. high source confidence; BikeSize reviewed 2026-10-25.
Specialized 2025 Diverge Comp Carbon geometry chart
Scope: 2025. high source confidence; BikeSize reviewed 2026-11-06.
Specialized S-Works Tarmac SL8 frameset geometry
Scope: 2023-2026. high source confidence; BikeSize reviewed 2026-09-10.
Trek Checkpoint SL 6 AXS Gen 3 geometry chart
Scope: 2025. high source confidence; BikeSize reviewed 2026-11-06.
Trek Domane SL 5 Gen 4 official geometry
Scope: undated. high source confidence; BikeSize reviewed 2026-11-04.
Trek Madone SLR 9 Gen 8 official geometry
Scope: undated. high source confidence; BikeSize reviewed 2026-11-04.
Trek Marlin 7 Gen 3 archived product 41217 geometry
Scope: Gen 3; archive product 41217 (year unspecified). high source confidence; BikeSize reviewed 2026-11-04.
Trek Roscoe Gen 4 frameset geometry chart (Roscoe 7)
Scope: Gen 4; model year not stated. high source confidence; BikeSize reviewed 2026-11-06.

Frequently Asked Questions

Closest bike geometry finder

Find frame sizes near your target stack and reach in BikeSize’s small manufacturer-sourced catalog. Set tolerances, see ranked deltas and check source scope.

Tool published November 4, 2026. Each chart's capture and review dates appear with its size rows. This is a candidate shortlist, not a body-to-bike fit prescription.

What this search does