In the early 1970s, Cosmic Car Accessories Ltd launched the Cosmic rim of the same name on the market. The Cosmic wheel was only available in PCD 4 x 130 and 5 x 130 for the Porsche 914 and 911. But since Volkswagen also uses the 4 x 130 PCD, the Cosmic was a hit with Porsche and Volkswagen owners. The Cosmic was not in production for long, after a period of two years, Cosmic Car Accessories Ltd disappeared from the VW and Porsche scene. Due to the short production period, there are very few original Cosmic rims. This is partly why Cosmic is a highly sought-after rim, for which high quantities are counted. It is almost impossible to obtain an original Cosmic rim, but there is a perfect alternative in the form of a hidden reproduction under the name Cosmo. The real connoisseur will be able to recognize the original Cosmic rim with his eyes closed, but this is not the most important thing for many. One of the most exclusive rims ever made is now available to many.
Supplied with rim cap and chrome valve, but without wheel bolts or nuts, please add them to your order.
For the different models (other PCD's) click on the "related parts" tab.
Additional information about wheels and wheel assembly
Before you buy a wheel you have to make sure that the PCD, ET and backspace are correct.
The width and diameter of wheels is measured in inches (1 inch = 25.4 mm), and the offset (ET-value) is expressed in mm. The offset is the distance from the hub-mounting surface to the wheel's true centerline. A positive offset (+) means the hub-mounting surface is closer to the outside edge of the wheel, i.e. the wheel wraps around the hub and brake hardware more deeply. A negative offset (-) means the hub-mounting surface is closer to the inside edge of the wheel and the wheel sticks outwards more than inwards. If you know the offset and the width of the wheel, you can determine how far the wheel sits inside or outside of the fender. We list the diameter and offset for each wheel. Please check these data before you order your wheels. A third important point is the amount of bolts and the pitch circle diameter (PCD). This relates to how the wheel is mounted. For each wheel we list the amount of bolts/nuts needed and the PCD. The PCD is the circle that can be drawn through the center of every bolt. For example: 4x130 means that the wheel has 4 bolt holes and a PCD of 130mm. You can change this by mounting other drum breaks or disc brakes or by using wheel adapters<. Please note that wheel adapters change your offset and might not be legal for street use (this depends on the laws of your country). The list below shows the stock amount of bolt holes, the PCD and the thread & pitch of the bolts/nuts that need to be used.
Attention! Always check that the bolts or nuts are of the correct type before you mount them, the seat and the thread size are crucial. If you work with bolts on drumbrakes make sure that they do not protrude and thus damage parts of the braking system. If needed shorten the bolts to the desired length.
Dimensions: In order to see whether the desired wheel has the dimensions that you need, there are several data available to help you determine the exact dimensions. The following diagram gives a clear picture of what is what and how to use them to determine the correct dimensions.
1. Backspacing
Measured from the surface of the drum or disc to the outside of the wheel, indicated in inches.
2. ET
Measured from the surface of the drum or disc to the center of the wheel. A positive value extends the wheel further inwards, a negative value extends outwards. A zero value means that it sites in the middle of the wheel. Measured in milimeters..
3. Width
The width of the wheel between the raised edges and thus not the overall outer size of edge-to-edge. Indicated in inches.
4. Diameter
The diameter of the wheel measured at the base, so not the outer edge. Indicated in inches.
Useful information from Paruzzi magazine and from our YouTube channel :
Look for more technical articles on the page Paruzzi Magazine