Use APKPure App
Get Hub Gear Calculator old version APK for Android
자전거 허브 기어의 속도, 롤아웃 등 계산
Hub gear calculator for bicycles
* Calculate speed in Mph or Km/h at a cadence of 60 to 120rpm
* Calculate rollout in meters or inches
* Calculate gear inches
* Calculate ratio
* Comprehensive database of tyre sizes to choose from
You can input 2 different chain ring sizes for comparison.