Rolling circumference and diameter for common tyre sizes, or an estimate from ri
Rolling circumference and diameter for common tyre sizes, or an estimate from rim bead diameter and tyre width in mm.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
1193 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://bike-calc.x402tookit.com/wheel-size
| Category | Everything else |
|---|---|
| Provider host | bike-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.02 | 1193 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"tyre": "700x25c"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"bsdMm": {
"description": "Rim bead seat diameter in mm (622 for 700c/29er, 584 for 650b/27.5, 559 for 26 inch MTB, 406 for 20 inch BMX)",
"type": "number"
},
"tyre": {
"description": "A preset: 700x23c, 700x25c, 700x28c, 700x32c, 700x35c, 700x38c, 26x2.0",
"type": "string"
},
"tyreWidthMm": {
"description": "Tyre width in mm, with bsdMm, for an estimate",
"type": "number"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"basis": {
"type": [
"null",
"string"
]
},
"circumferenceMm": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"diameterInches": {
"type": [
"null",
"number"
]
},
"diameterMm": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"metersPerRevolution": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"revolutionsPerKm": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}