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)
- 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
Formula to figure 3-Lug Bolt Circle:
- Bolt to Bolt (center to center) divide by (.864) = Bolt Circle
example 2.16"/ .864 = 2.50"
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 |