BOLT CIRCLE:
Diameter of a virtual circle passing through the center of all bolt holes.
Examples:
4-LUG BOLT PATTERN
Common Sizes:
- Light Duty American Hubs, measurement "A" = 2-13/16''
- Heavy Duty American Hubs, measurement "A" = 4''.
- Heavy Duty Metric Hubs, measurement "A" = 110mm or 115mm
3-LUG BOLT PATTERN (Racing)
Common Sizes:
- American, measurement "A" = 2-1/2''
- Metric, measurement "A" = 58mm
Bolt to Bolt Measurements for 3-Lug Bolt Patterns
A= Bolt to Bolt (center to center)
B = Bolt Circle
| Bolt to Bolt (A) | Bolt Circle (B) | Common Uses |
| 2.16'' (55mm) | 2.50'' (64mm) | American Racing Rims & Wheel Hubs |
| 1.97'' (50mm) | 2.28'' (58mm) | Shifter (Metric) Racing Rims & Wheel Hubs |
| 2.28'' (58mm) | 2.64'' (67mm) | Shifter (Metric) Racing Rims & Wheel Hubs |
| 3.03'' (77mm) | 3.50''(89mm) | 3-Bolt Hole Chinese ATV Wheels |
