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General parameters: 
Important: wheel disc parameter PCD indicates not only the diameter of circumference of the mounting holes, but also the number of mounting bolts or nuts (for example: 5x120, where 120 (mm) is the diameter of centers of the mounting holes, and 5 is the number of mounting bolts). 
Possible disk sizes for Alpina GTA: 

Procedure for calculating the disc offset: 
The distance between mating face of the wheel (the face with which the disk is pressed against the hub) and the middle of the width of disk is called disk offset (ET). The disk offset affects the width of the vehicle wheelbase, since the distance between the centers of symmetry (in width) of wheels on one axis directly depends on this parameter. Important: PCD of disks with four fixing bolts (or nuts) corresponds to the distance between the centers of opposite bolts (or nuts), PCD of disks with five fixing bolts (or nuts) corresponds to the distance between the centers of any nonadjacent bolts (or nuts) multiplied by the coefficient 1.051. 
General view General view  Disk Possible disk sizes for Alpina GTA of different years of manufacture and modifications  Wheel Possible wheel sizes for Alpina GTA of different years of manufacture and modifications  ET (mm) Disk offset Distance between the vertical plane of symmetry of the wheel and the plane of contact of the disk to the hub. Measured in millimeters (mm) 

(General view)  15'' 16''  15x6.0 15x8.0 16x7.0 16x9.0 15x7.0 16x6.5 16x7.5  from 15 to 40 
Year Model year of manufacture  Size Disk size in format: 1. D  diameter of the disk in inches. 2. x  a sign indicating the inseparability of the disk. 3. B  disk width in inches.  ET (mm) Disc offset: Distance between the vertical plane of symmetry of the wheel and the plane of contact of the disc to the hub.  PCD (mm) Disc drilling: 1. Number of bolt holes. 2. Diameter of the circle on which the mounting holes are located.  Tire Tire size in format: 1. Width of the work face. 2. Percentage of profile height to width. 3. R  type of construction (radial)  inner diameter (in inches).  DIA (mm) Center hole: Diameter of center hole, another marking is CH. 

2.5i Turbo  
1991  15x6.0  40  4x100  195/50R15  60.10 
1991  15x8.0  20  4x100  255/45R15  60.10 
1991  16x7.0  35  4x100  205/45R16  60.10 
1991  16x9.0  15  4x100  265/40R16  60.10 
1990  15x6.0  40  4x100  195/50R15  60.10 
1990  15x8.0  20  4x100  255/45R15  60.10 
1990  16x7.0  35  4x100  205/45R16  60.10 
1990  16x9.0  15  4x100  265/40R16  60.10 
1989  15x6.0  40  4x100  195/50R15  60.10 
1989  15x8.0  20  4x100  255/45R15  60.10 
1989  16x7.0  35  4x100  205/45R16  60.10 
1989  16x9.0  15  4x100  265/40R16  60.10 
1988  15x6.0  40  4x100  195/50R15  60.10 
1988  15x8.0  20  4x100  255/45R15  60.10 
1988  16x7.0  35  4x100  205/45R16  60.10 
1988  16x9.0  15  4x100  265/40R16  60.10 
1987  15x6.0  40  4x100  195/50R15  60.10 
1987  15x8.0  20  4x100  255/45R15  60.10 
1987  16x7.0  35  4x100  205/45R16  60.10 
1987  16x9.0  15  4x100  265/40R16  60.10 
1986  15x6.0  40  4x100  195/50R15  60.10 
1986  15x8.0  20  4x100  255/45R15  60.10 
1986  16x7.0  35  4x100  205/45R16  60.10 
1986  16x9.0  15  4x100  265/40R16  60.10 
1985  15x6.0  40  4x100  195/50R15  60.10 
1985  15x8.0  20  4x100  255/45R15  60.10 
1985  16x7.0  35  4x100  205/45R16  60.10 
1985  16x9.0  15  4x100  265/40R16  60.10 
2.9i GT  
1991  15x6.0  40  4x100  190/55R15  60.10 
1991  15x7.0  20  4x100  220/55R15  60.10 
1991  16x6.5  40  4x100  195/45R16  60.10 
1991  16x7.5  20  4x100  225/45R16  60.10 
1990  15x6.0  40  4x100  190/55R15  60.10 
1990  15x7.0  20  4x100  220/55R15  60.10 
1990  16x6.5  40  4x100  195/45R16  60.10 
1990  16x7.5  20  4x100  225/45R16  60.10 
1989  15x6.0  40  4x100  190/55R15  60.10 
1989  15x7.0  20  4x100  220/55R15  60.10 
1989  16x6.5  40  4x100  195/45R16  60.10 
1989  16x7.5  20  4x100  225/45R16  60.10 
1988  15x6.0  40  4x100  190/55R15  60.10 
1988  15x7.0  20  4x100  220/55R15  60.10 
1988  16x6.5  40  4x100  195/45R16  60.10 
1988  16x7.5  20  4x100  225/45R16  60.10 
1987  15x6.0  40  4x100  190/55R15  60.10 
1987  15x7.0  20  4x100  220/55R15  60.10 
1987  16x6.5  40  4x100  195/45R16  60.10 
1987  16x7.5  20  4x100  225/45R16  60.10 
1986  15x6.0  40  4x100  190/55R15  60.10 
1986  15x7.0  20  4x100  220/55R15  60.10 
1986  16x6.5  40  4x100  195/45R16  60.10 
1986  16x7.5  20  4x100  225/45R16  60.10 
1985  15x6.0  40  4x100  190/55R15  60.10 
1985  15x7.0  20  4x100  220/55R15  60.10 
1985  16x6.5  40  4x100  195/45R16  60.10 
1985  16x7.5  20  4x100  225/45R16  60.10 