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@a|s
Just been for a ride through the city centre (Manchester, not London) and had a bit of a weird rear wheel lock-up when skidding to a stop. Chain was real slack, looks like the rear wheel has slipped in the dropouts and moved forward, no real biggy.
Problem is now my drive side crank arm is scrubbing my chainstay. Previous to this incident there was a 2-3mm gap between the crank arm and the stay with a similar distance on the non drive side.
As i have a Miche BB, one of the ones with adjustable cups, when i set the chainline up the bb cup extended a couple of mm out of the bb shell drive side with the nondrive side cup sitting a couple of mm inside the bb shell.
it now looks as though the whole bb (ie the cups on both sides) have shifted towards the nondrive side a few mm, making my crank arm scrub. looking at the bb it seems as though the driveside cup isn't sticking out as much as it previously was, although this is just guessing as i can't clearly remember.
Anyone aware of this happening previously or is this even possible given the thread directions on the shell?
Trying to think about it in my head but can't remember which way the bb screws on each side. If it has slipped i would definitely be looking into replacing the bb with one with non-adjustable cups to prevent this happening again.