On August 24, Tadeusz Mazowiecki, a Solidarity representative, was elected Prime Minister of Poland, who became the first non-communist prime minister in Eastern Europe for almost four decades. By the end of the month, a Solidarity-led coalition government was formed. In December 1990, Walesa was elected president.
Wheel Offset. Wheel offset (abbreviated ET) is the distance from the mounting surface of the hub (M) to the wheelâs centerline (C). Offset can be positive or negative and is typically measured in millimeters. Wheel Backspacing. This is the distance created between the plane of the inner rim and the mounting surface of the hub (M).
1 Measuring from the hub mounting surface to the back edge of the wheel, the backspacing is 5.5â³.  If the offset on a 9â³ wide wheel is -12 mm, the hub mounting surface will be 12 mm towards the back of the wheel from the wheels center line.