必要なパーツ ドロップハンドルhttp://www.UPANBIKE.com/ Mountain Bike Road Bike Aluminum Alloy Handle Drop Handle https://www.amazon.co.jp/dp/B019XEWF7E/ref=cm_sw_r_awdo_navT_g_MANWJ4PPKJZB0MGNZV1A STIレバーSENSAH STI Lever Bicycle Left and …