Lexus IS tyre pressure and size guide

You need to check your Lexus IS tyre pressure regularly, so use this post to look up the size and desired inflation levels for the tyres fitted to your Lexus IS 250 and IS 300h.

We have included three-figure speed figures in this because maximum speed limits differ across Europe.

IS 250

Size

SE grade models feature 16-inch alloy wheels and use 205/55R16 91W-sized tyres. Luxury models ride on 17-inch alloys and use 225/45R17 tyres. F Sport and Premier grades use 225/40R18 88Y tyres up front and 255/35R18 90Y at the rear.

Pressure

16-inch wheels (SE): The front tyres should be inflated to 36 psi for speeds up to 132mph. At speeds above 132mph, the recommended inflation level is 38 psi unless five occupants are travelling. In this case, the tyres should be inflated to 39 psi.

At speeds below 132mph, the rear tyres should be inflated to 36 psi. If you are travelling between 100mph and 132mph with five occupants, the tyres should be inflated to 39 psi. At speeds above 132mph, the rear tyres should be inflated to 38 psi unless five persons are on board. In this case, the tyres should be inflated to 44 psi.

17-inch wheels (Luxury): The front tyres should be inflated to 36 psi for speeds at or below 132mph. For speeds above 132mph, inflate the front tyres to 38 psi, unless five occupants are on board. In this case, inflate the tyres to 39 psi.

The rear tyres should be inflated to 36 psi for speeds at or below 132mph. At speeds between 100mph and 132mph, the tyres should be inflated to 39 psi if five occupants are on board. At speeds of more than 132mph, tyres should be inflated to 38 psi unless five occupants are on board. In this case, the recommended inflation level is 44 psi.

18-inch wheels (F Sport and Premier): At all speeds, the front and rear tyres should be inflated to 36 psi. If you are carrying five occupants at speeds above 130mph, it is recommended that tyres be inflated to 39 psi.

300h

Size

SE grade models feature 16-inch alloy wheels and use 205/55R16 91W-sized tyres. Executive Edition, Luxury and Advance models ride on 17-inch alloys and use 225/45R17 tyres. F Sport and Premier grades use 225/40R18 88Y tyres up front and 255/35R18 90Y at the rear.

Pressure

16-inch wheels (SE): The front tyres should be inflated to 36 psi, but this can be increased to 39 psi in the interests of economy at speeds of 100mph or less.

The rear tyres should be inflated to 36 psi, unless five passengers are on board and speeds exceed 100mph. You may choose to increase inflation levels for rear tyres to 39 psi to increase economy. This is only advisable at speeds below 100mph.

17-inch wheels (Luxury, Executive Edition and Advance): For all speeds, the recommended front tyre inflation level is 36. The rear tyres should be inflated to 39 psi when the car is carrying five occupants at speeds of 100mph or more. For all other driving conditions, the inflation level for rear tyres is 36 psi.

18-inch wheels (F Sport and Premier): The recommended psi level is 36 for all speeds and passenger levels.