Before revision: This was indeed the case, as by 1986/ 7 sales in the UK had dropped off dramatically, with the new ATB or "mountain bike" taking off and soon to become the generic adult bicycle, again from California where it had begun in the mid 1970s.
After revision: By 1986/ 87 sales in the UK had dropped off dramatically, with the new "ATB" or "mountain bike" (another trend from mid-1970s California) taking off, soon to become the