{"uid":"cap_ieJywkF3fAsAYlVehqT2A","slug":"bicycle-gear-table-calculator-1939776e","name":"Bicycle Gear Table Calculator","description":"Gear inches and speed at a cadence for every chainring and cog in a drivetrain, with the range, steps and duplicate gears.","url":"https://bike-calc.x402tookit.com/gear-table?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["chainrings","cogs"],"properties":{"cogs":{"type":"string","description":"Comma-separated cog teeth, for example 11,12,13,14,15,17,19,21,24,28"},"wheel":{"type":"string","description":"Tyre preset: 700x23c, 700x25c, 700x28c, 700x32c, 700x35c, 700x38c, 26x2.0 (default 700x25c)"},"cadence":{"type":"number","description":"Cadence in rpm for the speed column (default 90)"},"chainrings":{"type":"string","description":"Comma-separated chainring teeth, for example 50,34"},"circumferenceMm":{"type":"number","description":"Rolling circumference in mm instead of a preset"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"cadenceRpm":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"lowestGear":{"type":["null","object"],"properties":{"cog":{"type":["null","number"]},"ratio":{"type":["null","number"]},"speedKmh":{"type":["null","number"]},"chainring":{"type":["null","number"]},"gearInches":{"type":["null","number"]}}},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"highestGear":{"type":["null","object"],"properties":{"cog":{"type":["null","number"]},"ratio":{"type":["null","number"]},"speedKmh":{"type":["null","number"]},"chainring":{"type":["null","number"]},"gearInches":{"type":["null","number"]}}},"combinations":{"type":["null","number"]},"rangePercent":{"type":["null","number"]},"sortedByRatio":{"type":["array","null"],"items":{"type":"object","properties":{"cog":{"type":["null","number"]},"ratio":{"type":["null","number"]},"speedKmh":{"type":["null","number"]},"chainring":{"type":["null","number"]},"gearInches":{"type":["null","number"]}}}},"circumferenceMm":{"type":["null","number"]},"averageStepPercent":{"type":["null","number"]},"largestStepPercent":{"type":["null","number"]},"nearDuplicateGears":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_YpNEqYqgACtIL5WGCZKVx","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a full gear-inch and speed table for every chainring/cog combination in a drivetrain, including range, step percentages, and duplicate gears.","exampleAgentPrompt":"Show me the full gear table for a road bike with 50 and 34 chainrings, an 11-12-13-14-15-17-19-21-24-28 cassette, 700x25c tyres, and 90 rpm cadence — including gear inches, speed per gear, the range, any duplicate gears, and the steps between combinations.","exampleUseCases":[{"title":"Road bike drivetrain audit","prompt":"Give me the complete gear table for my road bike: chainrings are 52 and 36, cassette is 11,12,13,14,16,18,20,22,25,28, wheels are 700x25c, and I typically spin at 90 rpm. I want to see gear inches, speeds, duplicates, and the overall range."},{"title":"Gravel bike low-gear check","prompt":"I'm building a gravel bike and want to check if my gearing is low enough for steep climbs — chainrings 46 and 30, cogs 11,13,15,17,19,22,25,28,32,36, 700x38c tyres, cadence 75. Show me the full gear table with the lowest and highest gears highlighted."},{"title":"Single-speed equivalent comparison","prompt":"Can you calculate the full gear table for a 1x drivetrain with a 42-tooth chainring and a 10,11,12,13,15,17,19,21,24,28 cassette on 700x28c wheels at 85 rpm, and tell me the range percentage and any duplicate gears?"}],"resultDescription":"A structured table of every chainring-cog combination with gear ratio, gear inches, and speed at the specified cadence, plus summary statistics: lowest gear, highest gear, total range as a percentage, number of combinations, number of duplicate gears, and percentage steps between adjacent gears sorted by ratio.","failureModes":["Missing required 'chainrings' or 'cogs' parameter returns an error","Non-numeric or malformed comma-separated values cause a parse error","Invalid tyre preset string falls back to default or returns an error","Cadence of zero or negative value may produce invalid speed results","Very large numbers of chainrings/cogs may time out or produce oversized responses"],"whenToPreferThis":"Use this endpoint when you need a complete drivetrain gear table across all combinations, not just a single gear calculation. It is ideal for comparing full groupsets, auditing for duplicate gears, assessing overall range, or generating a printable gear chart. For a single chainring/cog pair calculation, use the sibling single-gear endpoint instead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:14:25.405Z","isFirstParty":false,"canonicalSlug":"bicycle-gear-table-calculator-1939776e"}