The front, however, is largely unchanged in geometry, and only
basic height increasing measures have been employed.
While they rely on the same
basic high - strength steel platform structure as the standard 3 - and 4 - series, the new M3 and M4 receive a largely bespoke chassis with reduced ride
height and noticeably wider tracks, which have
increased by 1.3 inches up front and 0.7 inch at the rear to 62.2 inches and 63.1 inches respectively to provide BMW's latest in a long line of M cars with a sporting stance.