At the beginning of 2017, the British motorcycle manufacturer announced that they would replace the 675cc Street Triple with a new range of motorcycles with a 90cc displacement increase.
The new generation was released in 2018, and despite having a slightly larger engine, the new bikes weigh less than the first and second generations of 675cc bikes, with more compact engine casings.
The fourth generation of Street Triples came with four models. The range comprised the standard S, an intermediate R, a higher specification RS model, and a model used for UK A2 license purposes. Like the previous models, the twin headlight system was retained from the 2016 model.
The bikes were fitted with different equipment levels, such as suspension, brakes, and a quick-shifter. In addition, the three models delivered different power outputs, such as the S with 113 hp, the R with 118 hp, and the RS with 123 hp.
In 2018, the British motorcycle manufacturer launched the Triumph Street Triple RS, the most powerful machine of the new range. In addition to the larger engine, the bike came with four riding modes, Road, Rain, Sport, and Track, and a programmable Rider mode.
In the performance department, the 2018 Triumph Street Triple RS had its heartbeat set by a 765cc four-stroke three-cylinder liquid-cooled engine fed by an electronically-controlled fuel injection system, boasting 121 hp at 11,700 rpm and 77 Nm (57 lb-ft) torque at 10,800 rpm.