Tire Size Calculator

Size conversion is not compatibility approval

This tool converts nominal labels and estimates outside diameter and circumference. It does not approve a hooked or hookless tire/rim pairing, measure your frame clearance, or establish a safe pressure for your components.

1. Match bead seat diameter (BSD). A 700c and a 29er share a 622 mm BSD, but that alone does not make their tires and rims interchangeable.
2. Confirm the exact rim model, internal width and hooked/hookless design against both manufacturers' requirements for the exact tire model, size and casing. A width ratio or “tubeless ready” label alone is not approval.
3. Check actual inflated width and height, including knobs, at the narrowest frame, fork, brake and accessory gaps. Use the bicycle manufacturer's clearance requirements; a calculator estimate cannot approve this.
4. Use the most restrictive applicable manufacturer pressure limit for that pairing and tire size, including fitting limits. Adding a tube does not override hookless tire requirements. Missing approval or unknown limits mean “not determined,” not compatible.

See Schwalbe's tire dimensions guidance and ENVE's model-specific compatibility guidance. Both distinguish dimensions from the requirements of the actual rim/tire system. Reviewed November 4, 2026. After approval, use the pressure guide or tubeless setup guide for the next steps.