Wheel Sizing - Bolt Circle

Bolt Circle

The bolt circle is the notional circle determined by the positions of the bolts. The center of every bolt lies on the circumference of the bolt circle. The important measurement is the bolt circle diameter (BCD), also called the pitch circle diameter (PCD).

Bolt pattern guide by manufacturer

A general guide to common bolt patterns by manufacturer:

Ford: 5x114.3 mm, 4x108 mm

Mazda: 5x114.3 mm, 4x100 mm

GM (Chevy, Pontiac, etc): 5x115 mm, 5x120.7 mm

Dodge: 5x100 mm, 5x114.3 mm

Honda/Acura: 5x114.3 mm, 4x100 mm, 4x114.3 mm

Toyota/Lexus/Scion: 5x114.3 mm, 5x100 mm

Nissan/Infiniti: 5x114.3 mm, 4x114.3 mm

BMW: 5x120 mm

VW/Seat/Audi: 5x112 mm

Subaru: 5x100mm, 5x114.3mm

Peugeot/Citroen: 4x108mm

This guide is accurate for most of the cars made by the listed manufacturers, but it is important to check and make sure before purchasing new aftermarket wheels.

The BCD may be expressed in millimeters or inches, and is usually given with the number of bolts. For example, a 1974 MG B has a 4/4.5 inch (4/114.3 mm) wheel hub, meaning it has a 4-bolt pattern with a 4.5 inch (114.3 mm) bolt circle diameter.

The most common BCD values are 100 mm (≈3.94 inches) and 4.5 inches (114.3 mm). Many old British cars use 4 x 4"

Special BCD values are: 95.25 mm (for MGF and Rover Metro), 98 mm (for Fiat group automobiles), 101.6 mm (for Mini, MG, Austin Metro), 100 or 105 mm (for some GM vehicles), 108 mm (mostly for PSA, Ford and Lincoln), 110 mm (for some GM vehicles), 112 mm (for Mercedes-Benz and some VW group vehicles), 115 mm (for some GM vehicles), 120 mm (mostly for BMW), 130 mm (for Porsche), 170 mm (for Saab 96). Old British Triumph cars used 4 x 3.75" using 3/8" studs. (7/16" or M12 studs are advisable for track use)