Mercedes-Benz GLS550 tire size
The most common factory tire size for the Mercedes-Benz GLS550 is 295/40R21, on 6 of the 6 year and trim fits listed. Each year below lists the sizes its trims were built with (2017 to 2019). Pick your year and trim to see the tires that fit.
Mercedes-Benz GLS550 tire sizes by year
20191 size · 2 trims
295/40R21load index 111, speed rating W
20181 size · 2 trims
295/40R21load index 111, speed rating W
20171 size · 2 trims
295/40R21load index 111, speed rating W
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.