These where both great and bad time for bikes just wild. The 70's where marked by high points in handcrafted guality on the high end and some truely great budget buster bikes frome Japan. While the 80's seemed an era of a lot of failed tech advances as companies tried to compete and great advances when they succeded. There are some truely great high and even mid to entry level bikes that have yet to be matched and and some total dogs high and low. Personally I like a lot of the late 70' early 80's bikes they art of mass produsing basic quality bike had been perfected and the tech competion hadn't gotten ugly yet.