Pitch circle diameter/number of holes:
The pitch circle decides whether a wheel can be mounted on the hub of a vehicle. Do the rims of a vehicle have 4, 5 or 6 fixing bolts and what is the pitch circle diameter?

Centre hole diameter:
This denotes the size of the hole located in the rim centre and with which the rim is mounted unto the car. Here, it is important to check that the rim’s measurements correspond to those of the car.
Currently, DEZENT offers more than 600 readily drilled product items, which makes the use of so-called centring rings unnecessary. Therefore, you can generally use the standard attachments. However, in an effort to remain as flexible as possible, DEZENT is also using reduction rings. This means that a single hole in the rim enables the use of several (basic ring system) centre hole diameters (depending on the car manufacturer).

Offset:
The offset denotes the distance of the rim centre to the seats of the wheel hub and has an impact on the track width of a car.

Rim width:
The rim width is the nominal width of a rim, which is obtained by measuring the inner distance of the two rim flanges.

Hump:
The hump prevents the tyre from slipping off the alloy rim under the influence of strong lateral forces (e.g. cornering) and an associated sudden loss of air pressure.

Rim description: e.g. 7.5Jx17H2
7.5.... nominal width (rim width)
J....... rim flange size
17..... nominal rim diameter
H2.... double hump (depending on hump version)

Light alloy rims are a visual treat and look good on every car. This, of course, translates to: the bigger, the more attention. As regards alloy rims, however, size does play an important and weighty role. A bigger alloy rim guarantees a more pleasurable ride because a higher number of inches has a positive impact on steering and allows for a sportier quality of driving.

Furthermore, at 18 inches and above rims provide a shorter brake path on a dry road, with the wider tyres giving more grip or footprint. The size, width and height of tyres are always interrelated. As a result, selecting a bigger rim also changes the tyre height to make sure there is plenty of space in the wheelhouse. This might come at the expense of riding comfort since technically we are dealing with the unsprung mass of a wheel and hence stiffer suspension due to a lower tyre height.

Before purchasing a new alloy rim we recommend taking a look at the car’s registration or operation manual. Every car has certain technical specifications which also determine the selection of alloy rims that fit. If, for example, the desired rim dimension or inch size is not stated in the vehicle documents, in some countries it is required to add this information at the owner’s expense. Here, you have to pay attention because the respective rules and regulations differ all across Europe.