BMW 640i Spare Tire Sizes

The BMW 640i has used a 5x120mm bolt pattern for all models from 2012 to 2019 along with tire diameters ranging from 26.5" to 27.7" 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 640i years and options. In this case, 145/60R20 and 145/85R18 spare tire sizes are used to avoid vehicle components while closely matching the original tire size diameters.