Year Introduced: 1988

After the '88 Olympics, the ZX series leapt from model numbers in the hundreds to those in the thousands. THe first was the ZX 5000, which brought an impressive heal counter and Kevlar torsion system to the proceedings. With these features, the ZX 5000 kicked off a procession of key elements that define the series. The "'80s-proper shadowed stripes?" Yeah, those help propel the lightweight runner to low-key classic status.