thank you Sir.
so I need to reduce the cable shifter friction by only use minimum housing (instead of full cable housing) and its better to use the shifter housing (the one with wires along the 'tube') not the brake housing.
the bike doing fine, but sometimes I forget tha I am riding a long tail after several minutes and taking akward and clumsy turn at intersections
, after I replacing the bmx stem with mtb stem the handling getting better
and just this noon when I stop for a red light a truck bumped my bike and since my rear tire is lower than its bumper, its get stuck. both the bumper and my rear tire is fine, but now I am realize the ideas that someone cycling using longtail bike on the crowd at noon is unfamiliar and strange in my city. maybe I should install a pole and flag on the rear, or do you have other idea?