Cycling cleat and pedal compatibility: the shoe holes are only half the check

At the first interface, check the shoe's mounting pattern and the manufacturer's instructions for that sole. Bolt count is a useful identifier, not a complete approval: mounting curvature, recessed or exposed surfaces, bolt length, washers and an approved adapter can still matter. The second interface is the shape and mechanism that retain and release the cleat in the pedal. A shared shoe pattern does not make those engagement shapes interchangeable.

Write both relationships in plain language: shoe A accepts cleat B with the specified mounting parts; pedal C accepts cleat B according to its current documentation. Neither statement follows automatically from the other. Keep the exact references beside your measurements so a later mechanic does not have to infer the system from a photograph of three bolts.

A system may use an adapter between a shoe pattern and the cleat, or a shaped plate that supports the cleat against a curved sole. Record that approved assembly instead of counting only the final bolt heads. Removing a required layer to reduce height is not a measurement technique. Adding a washer or improvised spacer to make an incompatible part appear to fit is not evidence of approval.

The manufacturer's current model-specific instructions own permitted parts, fastening sequence and torque. This guide deliberately gives no cross-brand torque value. If a used component has unknown hardware, damage, unexpected movement or unreliable retention, keep it out of a ride trial and ask a qualified mechanic to identify it. A coordinate tool cannot inspect those physical conditions.

After a combination is documented as compatible, several separate properties remain. Float describes movement while engaged. Release characteristics concern leaving the pedal. Lateral position changes the shoe's relationship to the pedal axis. Stack concerns a declared vertical separation. None can be inferred from a compatibility yes alone, and none proves comfort, handling or rider suitability.

This distinction also prevents a common record error: replacing one model name while leaving every old dimension and reference untouched. Record what changed, what was physically re-measured and what remains unknown. If the full shoe or pedal assembly changed, a former cleat coordinate can be historically correct without describing the new contact interface.

Prepare a short inventory: exact shoe, cleat and pedal identifiers; approved mounting layers; left and right reference photos; the named coordinate and units; the source instruction used to confirm the assembly. Mark an unresolved item as unknown instead of filling it with the nearest catalogue answer. This gives a mechanic a clear question and prevents a planning number from becoming an installation claim.

Do not describe a click-in test alone as manufacturer compatibility, a successful installation or a rider fit result. Predictable engagement and release still need the correct physical checks under the exact instructions. If safe release is uncertain, stop the trial rather than searching for a float or coordinate value that hides the problem.