Raleigh Bicycle Company introduced in 1973 and only available in a bizarre shade of pink. This model was discontinued in 1976. The Mk 2 had a shorter seat and the frame modified to move the rear of the seat forward, this helped prevent the bike tipping up. The shorter seat also made it harder to ride '2 up' (2 people on the bike at a time). The "Chopper" remained in production until 1982, when the rising popularity of the BMX bicycle caused sales to drop off. Raleigh revisited the chopper design in recent times, with great success although the new version has had
Mountain bike terrain bicycle", "all terrain bike", and the acronym "ATB" are used as synonyms for "mountain bike", but some authors consider them passé. The original mountain bikes were modified heavy cruiser bicycles used for freewheeling down mountain trails. The sport became popular in the 1970s in Northern California, USA, with riders using older, single-speed balloon tire bicycles to ride down rugged hillsides. These modified bikes were called "ballooners" in CA, "klunkers" in CO, and "dirt bombers" in OR. Joe Breeze, a bicycle frame builder, used this idea and developed what is considered the first mountain bike. It was not until the