BMW 645Ci Spare Tire Sizes
The BMW 645Ci has used a 5x120mm bolt pattern for all models from 2004 to 2005 along with tire diameters ranging from 26.6" to 26.7" 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 645Ci years and options. In this case, a 145/60R20 temporary spare tire is the recommendation for all applications.