BikeSize Catalogue← Home

Find the differences that matter

Two bikes.
A clearer choice.

6402 models · 79 brands

The same size label does not mean the same bike. Choose a model and year, then compare the listed geometry.

See the differences ↓
ACanyonRoad

Endurace CF 7

2026

Canyon Endurace CF 7 2026 · Black Moon
BSpecializedRoad

Roubaix SL8 Sport 105

2026

Specialized Roubaix SL8 Sport 105 2026 · Gloss Vivid Red / Obsidian

The comparison in millimetres

What actually changes.

Canyon · SSpecialized · 54
Measurements for bikes A and B and the difference from A to B
MeasurementABB − A

All measurements are in mm. “+” means B has a larger measurement than A.

Stack and reach comparedTwo pairs of measurements referenced to the same bottom bracket. The diagram shows stack and reach, not the complete frame.Bottom bracketReach →Stack →

One reference point, two different front ends. Only stack and reach are shown.

Three measurements to understand.

01

Stack

The height of the front of the frame above the bottom bracket. Spacers and handlebars also affect your actual position.

02

Reach

The horizontal distance to the front of the frame. It is not the distance between the saddle and handlebars.

03

Standover

The top tube’s height above the ground as measured by the manufacturer. Compare it with your inseam and the measuring method used.

Start with your measurements.

Use the calculator for an initial estimate, then check sizing for the model you want to buy.

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Choose a bike

Search models with available geometry.