Bridgestone supplying 65% sustainable-content tires to solar car challenge

Arnhem, The Netherlands – Bridgestone is supplying the 2025 Bridgestone World Solar Challenge (BWSC) with tires based on its Enliten technology and made using more than 65% recycled and renewable materials.

The BWSC runs from 24 to 31 Aug, covering around 3,000km across Australia. This is Bridgestone’s seventh time sponsoring the event.

Bridgestone will supply tires to 33 teams from 17 locations, said a group statement 5 June.

For the first time, the tire maker is using recycled carbon black and steel recovered from end-of-life tires, developed through collaboration with Eneos, Nippon Steel, and Sanyo Special Steel.

The recycled steel used in the tires was processed from old tires collected at the Bridgestone Tire Recycle Center Osaka, then melted in Sanyo Special Steel’s electric furnace and rolled into bead wire by Nippon Steel.

“This event underscores Bridgestone’s focus on accelerating innovation for next-generation mobility,” the company said.

The new tires use Enliten technology, which is claimed to improve sustainability without compromising performance.

Bridgestone said the tires feature “low rolling resistance, durability, lightweight construction, and puncture resistance.”

The tires also incorporate Twaron aramid fibre from Teijin Aramid, which contains circular content.

The recycled-content fibers are used in the tire belt to provide strength and performance.

To reduce emissions from shipping, Bridgestone is working with DHL to use sustainable marine fuel. The logistics approach, called GoGreen Plus, can cut CO? emissions by up to 85%.

Bridgestone called the BWSC a “mobile laboratory” that helps it refine technology and push for carbon neutrality and a circular economy.