Road Bike Geometry Explained

車架幾何中有兩個數據：「Reach」和「Stack」是選擇車架是否合適的重要參考依據。 REACH是測量五通中心到頭管上緣中心的水平距離。

You know how shoes and jeans vary in size between manufacturers? It's the same with bikes. A 56cm bike from one brand might fit you perfectly while a 56cm bike from another might feel way too small. A frame size used to refer to the length of the seat

公路车车架几何详解（2）堆高STACK和前伸量REACH。 车架大小怎么选_哔哩哔哩_bilibili

A complete guide to the two most important bike geometry numbers: stack and reach, including why they're important and how to get them right

如果你是个新手小白，对自行车的车架几何一无所知，不妨从最基础也是最重要的堆高（Stack）和前伸量（Reach）这两个数据入手，这两个数据会影响骑行姿势，甚至决定你能不能骑上这台车。

View the calculated Stack and Reach values needed for your frame. The graph shows a mock up of a bike frame with your calculated Stack and Reach point. The red line indicates the top of the frame's head tube, and the dashed lines show the exact Stack