UK Driving Theory Practice Exam 2026 – Your All-In-One Guide to Passing on the First Try!

Underinflated tyres can significantly impact a vehicle's performance and safety. When tyres are not properly inflated, the contact area with the road increases, leading to greater rolling resistance. This increased friction requires more energy to maintain speed, which in turn leads to higher fuel consumption. Additionally, underinflation affects braking efficiency. With a larger contact patch, the tyres may not respond optimally when you brake, increasing stopping distances and potentially leading to unsafe driving conditions.

While other factors like potential loss of grip or other issues may arise from underinflated tyres, the primary and most direct consequences are the increased fuel consumption and the detrimental effects on braking performance, making the association with fuel efficiency and braking critical for drivers to understand.