BMW M850i Spare Tire Sizes
The BMW M850i has used a 5x112mm bolt pattern for all models from 2019 to 2023 along with tire diameters ranging from 26.5" to 26.8" tall. Using a temporary spare tire with a diameter close to the standard tire has many benefits, especially for modern vehicles with larger brake calipers and anti-lock brakes or traction control systems. Tire diameter as well as wheel diameter clearance have been taken into account for the specific BMW M850i years and options. In this case, a 145/60R20 temporary spare tire is the recommendation for all applications.