2015 Lexus IS Tire Size
The 2015 Lexus IS came with 205/55R16, 225/45R17, 225/40R18 or 255/35R18 tires, depending on the trim and wheel size. Recommended cold pressure: 36 psi.
Not sure which one you have? Read the size off your tire's sidewall, or check the label on the driver's door jamb. How to read a tire size.
✓ From the manual ·2015 Lexus IS owner's manual, p. 520, 521
Factory tire sizes
- Width
- 205 mm (8.1 in)
- Wheel
- 16 in · 16 x 7J
- Overall diameter
- 24.9 in
- Cold pressure
- 36 psi
- Load index
- 91 (1,356 lb)
- Speed rating
- W (up to 168 mph)
- Width
- 225 mm (8.9 in)
- Wheel
- 17 in · 17 x 7 1/2J
- Overall diameter
- 25 in
- Cold pressure
- 36 psi
- Load index
- 91 (1,356 lb)
- Speed rating
- W (up to 168 mph)
- Width
- 225 mm (8.9 in)
- Wheel
- 18 in · 18 x 8J
- Overall diameter
- 25.1 in
- Cold pressure
- 36 psi
- Load index
- 88 (1,235 lb)
- Speed rating
- Y (up to 186 mph)
- Width
- 255 mm (10 in)
- Wheel
- 18 in · 18 x 8 1/2J
- Overall diameter
- 25 in
- Cold pressure
- 36 psi
- Load index
- 90 (1,323 lb)
- Speed rating
- Y (up to 186 mph)
Spare tire
- Width
- 125 mm (4.9 in)
- Wheel
- 17 in · 17 x 4T
- Overall diameter
- 23.9 in
- Cold pressure
- 60 psi
- Load index
- 98 (1,653 lb)
- Speed rating
- M (up to 81 mph)
A temporary spare is for short trips at reduced speed, usually no faster than 50 mph. Follow the limit printed on the spare and in your manual, and replace the flat as soon as you can.
Questions
What size tires does a 2015 Lexus IS have?
The 2015 Lexus IS came with 205/55R16, 225/45R17, 225/40R18 or 255/35R18 tires, depending on the trim and wheel size.
Which size is on my 2015 Lexus IS?
Look at the sidewall of one of your tires: the size is the code that looks like 205/55R16. The label on the driver's door jamb also lists the original size and pressure for your exact trim.
What tire pressure does a 2015 Lexus IS need?
The manual gives 36 psi, measured with the tires cold. Check it before driving, and go by the door-jamb label if it differs, because that is set for your exact car.
Can I fit a different tire size on my 2015 Lexus IS?
Stick to a factory size for your wheel unless a tire shop confirms the swap. A different overall diameter changes speedometer readings and can upset ABS and stability control, and the load index must be at least the original.