Audi is ditching conventional steel suspension springs for GFRP (fiberglass)
Glass fiber reinforced plastic (GFRP) is seeing more and more use in modern cars as the material is relatively cheap and lightweight. The common term of course is fiberglass and Audi found another area to use it and will be incorporating it into the suspension system of their production cars. The most likely candidate to see the new GFRP springs is the facelifted Audi A7 sedan
set for an official launch later this year.
So why GFRP? The springs are lighter at 3.5 pounds to the 6.0 pounds of conventional steel. GFRP also will not rust which is certainly appealing in climates with snow and for longevity purposes.
This may sound new but it isn't. There are other production cars using fiberglass springs including the C7 Corvette.