On this particular example every single bolt head and allen key socket has been chewed as if by some crazed, chrome-eating beaver. This illustrates a rule known to all bicycle mechanics – that ace racing cyclists think they are ace bicycle mechanics but, in fact, athletic prowess and mechanical sympathy are mutually exclusive.
Next time you observe an accomplished cycling star eschewing a ring spanner in favour of the open-ended variety, using a screwdriver as a chisel or tightening a nut with a pair of pliers, remember all those adverts you see claiming that this or that product was developed using the expertise of that or this professional racing team – and thank your lucky stars that the claim is only so much marketing bullshit. — Michael Sweatman
Wrench Fu 