Do I need to know my exact tire size to use a bike gear calculator?

1-3 sentence answer grounded in the material

Can I compare gear inches across different wheel sizes with these tools?

1-3 sentence answer grounded in the material

Is it better to use gear ratio or gear inches when choosing bike gears?

1-3 sentence answer grounded in the material

Do any of these calculators work for internal gear hubs or track bikes?

1-3 sentence answer grounded in the material

Sports6 options compared

Bike Gear Calculator

This calculator lets you enter chainring and sprocket ranges and outputs detailed gearing data including gear ratios and gear inches. It also supports wheel/tire parameters so values are more realistic for your setup. The web tool is available with a free tier and does not require a paid plan to use basic calculations.

Cycling calculators

Editors’ Top PickBased on community votes

Ritzelrechner

ritzelrechner.de

This tool provides interactive chainring and sprocket selection with gearing tables and cadence/speed views. It is bu...

Open Ritzelrechner Read review →

Other OptionsRanked by votes

02
02
HowTo.Bike
howto.bike
This calculator lets you define cassette and chainring combinations and view a table of all gear ratio combinations. ...
Open site View details
03
03
BikeCalc
bikecalc.com
This calculator lets you enter chainring and sprocket ranges and outputs detailed gearing data including gear ratios ...
Open site View details
04
04
Gearfinder
gearfinder.cc
The app lets you input chainrings and sprockets and compare gearing combinations in different display modes. It is in...
Open site View details
05
05
Omni Calculator
omnicalculator.com
The bike gear calculator shows the tables of gear ratios and gear inches for chosen chainring and cog ranges.
Open site View details
06
06
Sheldon Brown
sheldonbrown.com
The calculator supports chainrings, cassettes, wheel sizes, and optional internal hubs, then generates results in gea...
Open site View details

Side by side

Bike Gear Calculator options compared

Tool	Best for	Strengths	Limitations
Ritzelrechner ritzelrechner.de	Interactive ratio analysis	Built specifically for drivetrain ratio analysis Free online use without payment	No live page excerpt available Community votes low at 5
HowTo.Bike howto.bike	Comparing gearing options	Displays gear inches for wheel standard comparison Allows custom cassette and chainring input	Gear inches assume old 27" wheel, may not match modern metric 700c calculations Treats gear inches as relative measure only
BikeCalc bikecalc.com	Realistic gearing with tire params	Outputs gear ratios and gear inches Supports wheel/tire parameters for realistic values Free tier with basic calculations	Requires measuring tire thickness and rim diameter for accurate results
Gearfinder gearfinder.cc	Quick gear inch comparisons	Free service with slider controls for chainring/sprocket Shows speed and distance at steady rpm cadence	Gear inches typically assume 27" wheel, not modern 700c with tire size No substitute for actual tape measurements
Omni Calculator omnicalculator.com	Comprehensive gear ratio tables	Shows tables of gear ratios and gear inches Users can input chainring and cog ranges for comprehensive output Free access with no paywall	May include similar collection calculators that distract from core task
Sheldon Brown sheldonbrown.com	Traditional gear inch calculations	Supports chainrings, cassettes, wheel sizes, and optional internal hubs Generates results in gear inches and related units Freely accessible with no paywall, widely used by cyclists and mechanics	Calculator works in any browser supporting Javascript; field outlines may be faint on phones

Buyer's guide

How to choose a bike gear calculator

When picking a bike gear calculator, first decide what you need most: gear ratio numbers for precise drivetrain tuning, or gear inches for a quick sense of how hard or easy each combination will feel. If you have specific wheel and tire measurements, choose a tool that lets you input those values so the gear inches reflect your actual bike rather than generic assumptions. If you just want to compare a few setups side-by-side, a calculator with slider controls or a table view will be faster than one that requires entering every chainring and sprocket individually.

Questions

Bike Gear Calculator FAQ

Do I need to know my exact tire size to use a bike gear calculator?: 1-3 sentence answer grounded in the material
Can I compare gear inches across different wheel sizes with these tools?: 1-3 sentence answer grounded in the material
Is it better to use gear ratio or gear inches when choosing bike gears?: 1-3 sentence answer grounded in the material
Do any of these calculators work for internal gear hubs or track bikes?: 1-3 sentence answer grounded in the material

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