Yeah I’ve tried to bodge a hose brush before but the official item makes it sooo much easier.
pretty much everything really!
How you figure?
With a lot of cheap things there are clear economies of scale (like thomthumbs’s coppaslip example above), they are mass market products or corners can be cut in the most hideous ways. (Think of the differences between a Halfords £80 special and what most of us ride).
I think we’re quite lucky with bike parts – you can buy very solid reliable stuff for silly cheap, or spend a bit more on very nice stuff indeed from the Hopes, Thomsons and Paul Components of this world. The only things that I’d say come into the “rip-off” category are boutique items – like Yumeya – and the people who buy that don’t care.