noticed that the cassette on my road bike is loose (shimano 9 speed/mavic aksyum)
turns out i never fitted/got/have lost the spacer that goes behind the cassette, i've bodged something that kind of looks the part from my toolbox on there but it's a little too thick. does anybody know where i can get one, i'd try my lbs but won't be able to get in there for a while

