2012 Lexus IS Tire Size
The 2012 Lexus IS uses different sizes front and rear: 225/45R17 or 225/40R18 at the front and 245/45R17 or 255/40R18 at the rear.
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 ·2012 Lexus IS owner's manual, p. 532, 533, 534, 535, 536
Factory tire sizes
- Width
- 205 mm (8.1 in)
- Wheel
- 16 in
- Overall diameter
- 24.9 in
- Load index
- 89 (1,279 lb)
- Speed rating
- W (up to 168 mph)
- Width
- 225 mm (8.9 in)
- Wheel
- 17 in · 17 x 8J
- Overall diameter
- 25 in
- Load index
- 91 (1,356 lb)
- Speed rating
- V (up to 149 mph)
- Width
- 225 mm (8.9 in)
- Wheel
- 17 in · 17 x 8J
- Overall diameter
- 25 in
- Load index
- 91 (1,356 lb)
- Speed rating
- V (up to 149 mph)
- Width
- 225 mm (8.9 in)
- Wheel
- 18 in · 18 x 8J
- Overall diameter
- 25.1 in
- Load index
- 88 (1,235 lb)
- Speed rating
- Y (up to 186 mph)
- Width
- 245 mm (9.6 in)
- Wheel
- 17 in · 17 x 8J
- Overall diameter
- 25.7 in
- Load index
- 95 (1,521 lb)
- Speed rating
- V (up to 149 mph)
- Width
- 255 mm (10 in)
- Wheel
- 18 in · 18 x 8 1/2J
- Overall diameter
- 26 in
- Load index
- 95 (1,521 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
- 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.
- Width
- 145 mm (5.7 in)
- Wheel
- 17 in · 17 x 4T
- Overall diameter
- 25 in
- Load index
- 106 (2,094 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 2012 Lexus IS have?
The 2012 Lexus IS uses different sizes front and rear: 225/45R17 or 225/40R18 at the front and 245/45R17 or 255/40R18 at the rear.
Which size is on my 2012 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.
Can I fit a different tire size on my 2012 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.