Which statement best describes the relationship between tire operating temperature and grip, and how it should be optimized for a race?

• A. Operating temperature has no effect on grip; pressure alone determines grip.
• B. Underheating reduces grip, overheating degrades compounds and wear; use warm-up laps and monitor pressures to bring tires into the target window, adjusting for track temperature and load.
• C. Overheating always improves grip regardless of duration.
• D. Temperature only affects wear, not grip, and should be kept constant.

Answer: (B)

Grip comes from how the tire rubber behaves at different temperatures. When the tire is too cold, the rubber is stiff and doesn’t conform to the track, so grip is limited. As it heats into the optimal operating window for the specific tire compound and track, the rubber becomes able to deform just enough to maximize friction and traction. Going past that window, the compound can break down, soften excessively, glaze, or wear unevenly, which actually reduces grip and increases degradation over a run. That’s why the practical approach is to bring tires into their target temperature range through warm-up laps and manage pressures as heat builds, since pressure rises with temperature and affects the contact patch and heat transfer. Track temperature and load influence how quickly tires heat and what window you should aim for, so adjustments are needed throughout a stint. Statements that claim temperature has no effect, or that overheating always helps, or that temperature only affects wear and should stay constant, don’t reflect the real relationship between grip, tire chemistry, and race strategy.