The Adidas ZX Racer is a running shoe that was released in the mid-1980's. The ZX series of middle/long distance running shoes were exceptionally popular in the 1980's, and included: ZX 400, ZX 500, ZX 700, ZX 750 and ZX 8000. A modern 'take' on the ZX shoes is the ZX Flux.
All of the ZX shoes released in the 1980's have a similar design, however, the ZX Racer is a more basic example of a ZX shoe; I do not currently know it's release year, but judging by the shoe's no-frills design, it was probably released around 1983-1986. The ZX Racer has a nylon/suede upper that features the traditional three stripes and heel tab design. The colourway of the shoe is two-tone, as shown above, with two colourway example's shown: grey/red and white/black. The midsole of the shoe features EVA, an elastomeric polymer that cushions the foot and improves comfort for middle/long distance runs. The outersole of the ZX Racer is made from a 'grippy' rubber, with a patterned design that is intended to grip a range of surfaces: suitable for cross country rural running and urban road running. The ZX Racer is now a retro running shoe, marketed by Adidas as casualwear, rather than for running; there are far superior modern Adidas running shoes.