Bolts and nuts
Bolts or Nuts?
Unlike replica wheels, most wheels on the market do not fit with original nuts or bolts of your vehicle.
First, it is important to understand the difference between bolts and nuts. Bolts are used for European vehicles such as Audi, BMW, Mercedes, etc. Unlike nuts, they are bigger because European cars do not have studs. That is why the price is higher. Chrome bolts are $ 60 a set and black bolts are $ 80 a set.
Other cars (Japanese or American for example) are equipped with nuts because the nets are already in place. Chrome nuts are $ 40 a set and black nuts are $ 60 a set.
Why Change Bolts and Nuts When Changing Wheels?
Tuner bolts and nuts are always recommended when buying new wheels, except for RWC or DTD (they replicate your vehicle's original wheels in which fit the original nuts) because the holes on aftermarket wheels are usually smaller than the ones on your original wheels. Therefore, when using origial nuts, the socket might be too big, causing rubbing on the rim and damage on the wheel. The socket may not even fit in the hole, keeping you from tightening the nuts.
Moreover, if you happen to have a puncture while having original nuts/bolts, the supplied key will likely to be too big, so you will not be able to remove the default wheel.
The seat is the contact area between the nut/bolt and the wheel: it can be conical, flat or spherical. The seat type has to be compatible with the wheel for the nuts/bolts to be properly and safely tightened. Vibration problems could occur if the nuts/bolts are not adapted to the wheel.
In addition, as mentioned, vibration problems can be felt if the bolts are not adapted to the wheel.