What size wheels and tires does the 850CSi have?
There were three different factory wheel and tire packages for the 850CSi. Standard (and also most common) was the M System II alloy wheel shared with the 3.8-liter E34 M5. This consisted of a five-spoke forged alloy center combined with a plastic outer cover in a “throwing star” design. However, as an option in some markets (not including the USA), the 850CSi could also be equipped from the factory with traditional cross-spoke alloy wheels. Both styles of wheel were sized 8×17-inch in the front and 9×17-inch in the rear, combined with 235/45ZR17 and 265/40ZR17 tires, respectively. As of early 1995 production, 18-inch M Parallel Spoke alloy wheels became available as an optional upgrade for the 850CSi in some markets (not including the USA). The 8×18-inch front wheels were fitted with 245/40ZR18 tires, while the 9.5×18-inch rear wheels carried 285/35ZR18 tires.