These easy to install replacement valve caps constantly monitor your tire pressures with clear, bright colour indicators. Tire zoned valve caps are precisely made for a full range of cars, vans, motorcycles and light trucks and are accurate to within 1 lb. Utilize the tire zone safety pressure indicators and travel with confidence. Be sure to choose the tire zoned to match the front and rear pressure as recommended by the vehicle manufacturer ( not the tire ) Spec Compact: 800-1200cc:26~30psi Sports car: 1200-3000cc:26~30psi 3000-5000cc:32~36psi Station wagon: 1200-2000cc:28~32psi 2000-5000cc:32~40psi Sedan: 1200-3000cc:26~32psi 3000-5000cc:32~40psi Jeep: 1600-3000cc:26~32psi 3000-5000cc:32~40psi