por acaso não Miguel. e está no link acima essa parte também o "pitch" espaçamento entre os pivots é o mesmo. Penso que isso se dê porque o dente do cog não entra bem num elo e depois o segundo ainda entra pior e por aí fora.
" 3. Bicycle Chain Pitch
For a complete conversation about bicycle chain sizes, you also need to consider the measurement that dictates the distance between adjoining pins or rivets.
For all purposes, you can consider it a given. All chains produced today are built with pins machined 1/2" apart. You may want to read a further discussion on "chain stretch" when you place a metal ruler against an old chain and find that the pins don't line up nicely at the 1/2" marks.. a clear sign that maybe it needs to be replaced."
