Tire Exchange Calculator app for iPhone and iPad

This Tire Exchange Calculator will help you to make sure if the tire size you are going to exchange is compatible with your factory or current tire size.

This calculator will help you to find all relative velocity difference at wheel from 100km/h to 240km/h (60mph to 160mph) with current tire and the new set.

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輪胎誤差自動計算程式是一個簡單的 iPhone 工具, 它可以幫你換算新輪胎/圈組合是否與原先(或是原廠的)輪胎/圈組合有無誤差. 是個升級輪圈時相當有用的工具. 本工具提供了計算以下數據的功能:

1. 新舊輪胎的厚度
2. 新舊輪圈的直徑
3. 新舊輪胎/圈組合的直徑
4. 更換輪胎後車身高度變化
5. 新舊輪胎的周長以及相對誤差值
6. 時速 100km/h 到 240km/h 之間新舊輪胎間的相對時速誤差