1967

In 1967, LEGO began to better define and redefine how LEGO sets were scaled. This was an important change that we still see in modern LEGO sets today. During the 1960’s the size of LEGO sets and scale of the models had changed, mostly growing larger over time. With the mid 60's introduction of model sets, known as Model Makers in the US, these sets were based, not on the 1:87 scale of the Town Plan, but on the larger scale of the 2 x 2 wheel. The train sets introduced in the previous year and a series of truck models in 1967 were also designed around the 2 x 2 wheel and from that point on all new development was based on this larger scale. The LEGO System had changed from the loosely scaled Town Plan to a larger, and much more consistent, scale. A scale that integrated nearly all the sets and one that is close to the mini-fig scale of today.

Because of this scale change, the Town Plan sets and the 1:87 vehicles were phased out. The following year, the remaining LEGO vehicle inventory was packaged and sold as sets, and today, these sets are some of the most valuable of all LEGO collectables.

Some other notable changes in 1967 was that the first black tires for 2x2 and 4x4 wheels were introduced and the first LEGO hinges were introduced in sets. LEGO also began running set promotions with the first of that year being the release of 6 promotional sets with Kraft Velveeta.