You are reading a single comment by @Mr_Bump and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Mr_Bump
I've run cup and cone bottom brackets for over 30 years and so long as you check them now and again (as in remove non drive cup, spindle, clean & regrease bearings) then they should last for many thousands of miles.
I never went out of my way to get a sleeve as none of my frames are slotted under the bottom bracket shell which some higher end racing frames were and hence why some of the higher end BBs had the sleeves to give extra protection.
if your frames' BB isn't slotted I wouldn't worry about it too much.
In fact I just fitted a NOS 105 cup and cone job to my newly updated 80s 30 speed audax bike and there's no plastic sleeve on that either