Where the weight sits in a spinning part, especially how much is near the rim.
What it is
Mass distribution describes how weight is spread across a spinner or rotor. Putting mass at the rim increases rotational inertia, which helps it keep turning.
Why it matters
Rim-weighted designs spin longer and feel steadier; center-heavy designs feel livelier and change direction more easily. Uneven distribution causes wobble and vibration.
Also known as: Weight Distribution, Rim Weighting, 重量分布.
是什么
惯量分布描述重量在陀螺或转子上的分布。把重量放在外缘会增加转动惯量，让它更能持续转动。
为什么重要
外缘加重的设计转得更久、更稳；重量集中在中心的设计更灵活、更容易变向。分布不均会造成晃动和振动。
又称：Weight Distribution、Rim Weighting、重量分布。
