Kevlar is a heat-resistant and very strong synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, this high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tyres.
Kevlar is used in tyres in two ways:
- As a replacement for the steel coils that form the tyre’s edges (known as beads);
- As sub-tread, which is a protective layer that rests between the external rubber and the internal fabric casing that forms the tyre’s structure.
How strong is Kevlar?
The specific tensile strength (stretching or pulling strength) of both Kevlar 29 and Kevlar 49 is over eight times greater than that of steel wire. Unlike most plastics it does not melt: it’s reasonably good at withstanding temperatures and decomposes only at about 450°C (850°F). It is strong relative to its weight.
Can Kevlar stop a bullet?
Kevlar is able to stop a bullet due to its molecular structure that is why it is also used to construct bulletproof vests: it’s lightweight, durable, flexible, and most importantly, extremely difficult to break through. Does that mean your tyres are bulletproof? The specific structure used in manufacture of bulletproof vests in not applicable to tyres, so no, but it does mean they’re substantially stronger and could reduce the damage to a tyre in the event of a bullet impact.
The following are popular tyres build with Kevlar.
255/55R19 Falken Azenis FK510Product on sale
185/65R15 MIRAGE MR162Product on sale
175/70R14 MIRAGE MR162KSh4,500
195/70R14 MIRAGE MR162KSh5,500
195/70R14 Tracmax X-privilo TX5KSh5,500
185/65R15 Tracmax X-privilo TX5KSh5,500
265/70R15 TRACMAX XPrivilo AT01KSh11,800
195/60R16 Joyroad Sport RX6KSh6,500
215/70R16 TRACMAX XPrivilo AT01KSh8,500