Everybody is good, what share today is electric tricycle leaves rise the noise of Ji of case of Ji of rear wheel case, the problem is searched. Car advocate say the car opens the noise that rises to always hear Ji of case Ji case, come over to check so below, test-drive hears right wheel to be able to have sound as expected, open screw cap to see round of place that 4 screw secure on casing annulus casing has flaw, see here can understand why to be met Ji of case Ji case rang. The problem goes be in this annulus on casing, because have flaw, the sound that attrition of can mutual extruding produces the place of the crackle when wheel is rotational. This is it is good to change, this car is to sell fruity, come down I am analysed simply below why over there can crack, I feel to have these a few factors, these 4 screw did not hit ① close become loose, bring about round of casing aperture and screw extruding to become loose, pull deadweight, wheel can swing, bring about over there crack. ② annulus circle is too small, quality problem. ③ has been bumped. Has everybody encountered similar problem? I had seen the most serious is round of casing exploded directly, namely annulus casing is direct two half. | | | [dedicated and dynamoelectric Che Weixiu is shared, attention understands more. ]