Drive sid cup keeps coming loose
Check that the bottom bracket shell is square on to the cup & flat, easiest way i `ve found is to wind cup nearly all the way in, & check the gap with feeler gauges. if it`s not the above[square& flat]it will only tighten on a small part & will work loose as only part is tight. If its way out most LBS`s have a bracket facing tool Are both threads right hand [as Italian]as these seem to suffer more problems than the Left Right combo`s . Another fix is to use the thinnest Sturmey Archer sprocket spacer betwwn bracket & cup [but this will alter the chain line slightly
Check that the bottom bracket shell is square on to the cup & flat, easiest way i `ve found is to wind cup nearly all the way in, & check the gap with feeler gauges. if it`s not the above[square& flat]it will only tighten on a small part & will work loose as only part is tight. If its way out most LBS`s have a bracket facing tool Are both threads right hand [as Italian]as these seem to suffer more problems than the Left Right combo`s . Another fix is to use the thinnest Sturmey Archer sprocket spacer betwwn bracket & cup [but this will alter the chain line slightly
