建議可以直接換 BCD110mm 50t/36t 的橢圓盤~~ 依照橢圓盤的特性~ 50t/36t ,齒比能夠呈現出 48~52t/34~38t 的效果~~ 這樣的齒比接近53/39T,並且能夠增加畫圓的順暢度&踩踏的效率!!! 下列為廠商對50t橢圓盤的敘述~~~ A 50T Q-Ring, around the upper dead-spot is equivalent to a 48T, but as the pedal goes down and more strength is applied, the equivalent chainring tooth size reaches 52T.