Gear ratio, gear inches, development per pedal turn and speed at a cadence for a
Gear ratio, gear inches, development per pedal turn and speed at a cadence for a chainring and cog on a given wheel.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
490 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/gear-ratio
| 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 | $0.02 | 490 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"cadence": 90,
"chainring": 50,
"cog": 17,
"wheel": "700x25c"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"cadence": {
"description": "Pedalling cadence in rpm (default 90)",
"type": "number"
},
"chainring": {
"description": "Chainring teeth (for example 50)",
"type": "integer"
},
"circumferenceMm": {
"description": "Rolling circumference in mm instead of a preset (measure it on the bike)",
"type": "number"
},
"cog": {
"description": "Rear cog teeth (for example 17)",
"type": "integer"
},
"diameterInches": {
"description": "Wheel diameter in inches instead (for example 26 for a 26 inch wheel)",
"type": "number"
},
"wheel": {
"description": "Tyre preset: 700x23c, 700x25c, 700x28c, 700x32c, 700x35c, 700x38c, 26x2.0 (default 700x25c)",
"type": "string"
}
},
"required": [
"chainring",
"cog"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"cadenceRpm": {
"type": [
"null",
"number"
]
},
"chainring": {
"type": [
"null",
"number"
]
},
"circumferenceMm": {
"type": [
"null",
"number"
]
},
"cog": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"developmentMeters": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"gearInches": {
"type": [
"null",
"number"
]
},
"metersPerMinute": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"ratio": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"speedKmh": {
"type": [
"null",
"number"
]
},
"speedMph": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"wheelDiameterInches": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}