BMW 135i tire size
The most common factory tire size for the BMW 135i is 215/40R18 front, 245/35R18 rear, on 12 of the 12 year and trim fits listed. Each year below lists the sizes its trims were built with (2010 to 2013). Pick your year and trim to see the tires that fit.
BMW 135i tire sizes by year
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.