There are many brands of aftermarket steering wheels, steering wheel hubs, quick releases, and associated accessories. Many brands are compatible with one another, and generally, hubs, quick releases and steering wheels which share the same bolt pattern can work together.
Bolt pattern, also referred to as Pitch Circle Diameter (PCD) is the diameter of the circle which passes through the center of all the holes of the steering wheel. Use the guide below to learn what bolt pattern each brand uses, to find out what parts can be used together.
Grant 3 Bolt Steering Wheel Bolt Pattern
Grant 3 hole steering wheels use a 3×1.750″ PCD and are typically used with Grant 3 hole steering wheel adapters, however, 3rd party adapters are available to convert them to work with other steering wheel hubs.
Grant 5 Bolt Steering Wheel Bolt Pattern
Grant 5 bolt hole steering wheels use a 5×2.75″ bolt pattern and are compatible with Grant 5 bolt steering wheel hubs. NRG 5 bolt quick releases can be used in conjunction with Grant steering wheels.
NRG 5 Bolt Quick Releases
Circuit Performance, NRG, OMP, Sparco, MOMO & Grip Royal Steering Wheel Bolt Pattern
By far the most popular, the 6x70mm bolt pattern steering wheels and accesories are used by leading brands such as Circuit Performance, NRG Innovations, OMP, Sparco, MOMO and Grip Royal.
6x70mm STEERING WHEELS
Nardi & Personal Steering WHeel Bolt Pattern
Italian made Nardi and Personal steering wheels use a slightly larger 6x74mm bolt pattern. Nardi also makes a line of steering wheel hubs to work with these 6x74mm steering wheels.
Grant 6 Bolt Steering Wheel Bolt Pattern
Grant 6 bolt steering wheels use a 6×2.75″ bolt pattern. 2.75 inches is equivalent to 69.85mm, which put this within 0.15mm of the very popular 6x70mm used by MOMO, NRG, Circuit Performance, and OMP. As such, 6 bolt Grant steering wheels can be used with most of these brand steering wheel hubs & accessories.
4 thoughts on “Steering Wheel Bolt Patterns Explained”
Excellent article on steering wheel bolt patterns, short and to the point, great presentation of the info!!!
you may also want to indicate that Grip Royal, even though it has the 70mm PCD like MOMO and NRG, has the pattern rotated into the Nardi style… which in most cases require you to either have a Grip Royal Adapter (or a rotational spacer/conversion ring to work with MOMO, NRG, Sparco, OMP, and other 70mm PCD adapters)
Don’t forget the Mounteney 102 PCD 6 hole!
What about OBA? 7 bolt pattern seems almost impossible to find hub/boss kits?