Subaru WRX STI tire size
The most common factory tire size for the Subaru WRX STI is 245/40R18, on 10 of the 18 year and trim fits listed. The table lists every year from 2015 to 2021 and the size each trim was built with. Pick your year and trim to see the tires that fit.
Subaru WRX STI tire sizes by year
| Year | Factory tire size | Trims |
|---|---|---|
| 2021 | 245/35R19 | Base, Limited |
| 2020 | 245/35R19 | Base, Limited |
| 2019 | 245/35R19 | Base |
| 265/35R19 | S209 | |
| 2018 | 245/35R19 | Base, Type-RA |
| 2017 | 245/40R18load index 97, speed rating W | Base, Limited, Sedan |
| 2016 | 245/40R18load index 97, speed rating W | Base, Limited, Sedan, Series.HyperBlue |
| 2015 | 245/40R18load index 97, speed rating W | Base, Launch Edition, Limited |
Check your own tire
A trim can be sold with more than one wheel size. The size printed on the sidewall of your current tire, or on the placard in the driver's door jamb, is the one your vehicle has.