不知道该升级什么了，换了这......
刚收到RPM的后杯，虽然不知道结实不结实，但从轴承看的确厚实了！http://image.rcfans.com/data/appbyme/upload/image/201809/26/sxjhIonWnJm2.jpg
http://image.rcfans.com/data/appbyme/upload/image/201809/26/qBmRDjm6Ajnx.jpg
http://image.rcfans.com/data/appbyme/upload/image/201809/26/ms7yVoAaRoS0.jpg
http://image.rcfans.com/data/appbyme/upload/image/201809/26/0OfoZ53DlDRI.jpg
http://image.rcfans.com/data/appbyme/upload/image/201809/26/fReno8M5OHZ0.jpg
http://image.rcfans.com/data/appbyme/upload/image/201809/26/DXq5tTnPHebC.jpg
http://image.rcfans.com/data/appbyme/upload/image/201809/26/ectDAJMA3jOa.jpg
轻巧了很多，买这个后杯并不需要当时再买轴承了，外侧轴承可以先用原车的！
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