I remember one bicycle with 4 front chainrings back in the early 90´s. It was a low spec bicycle sold in some supermarkets in my country. The common was 1 (low spec)-2 or 3 chainrings but 4???? Yes and here it is a photo ... 6x4 The front gear lever is not indexed. The Speria Colorado sold in...
www.retrobike.co.uk