Welcome! Bienvenu! Willkommen! Yokoso! This page was created to give an overview of all the different wheels that are or were being made
for Minis, or any car with a 4x4" PCD. Ranging from 10" to 13". Since it is hard to get accurate information for almost 500 wheels this page is constantly
developing and receives almost daily changes and updates. But I try my very best to change this!
Without your help and encouragement this project could not have even been started - MANY THANKS TO EVERYBODY! WITHOUT YOUR HELP, YOUR EFFORT OF SENDING ME PICTURES AND INFORMATION THIS PAGE COULD NOT EXIST! :-)
If you have something which is not listed here or if you can identify any unknown wheel or like to report an error,
fell welcome to mail me at strassenbelag at gmx dot net! I'm always happy to read your e-mails!
If you want to help me covering the costs of hosting, you may do this here:
The offset of a vehicle's wheel is the distance between the centerline of the wheel and the plane of the hub-mounting surface of the wheel.
It can thus be either positive or negative, and is typically measured in millimeters.
Offset has a significant effect on many elements of a vehicle's suspension, including suspension geometry, clearance between the tire and suspension
elements, the scrub radius of the steering system, and visually, the width of the wheel faces relative to the car's bodywork.
The scrub radius is distance between the Steering Axis Inclination (SAI)and the center of the wheel where both would theoretically
touch the road. The steering axis is the line between the top pivot point of your hub and the lower ball joint of your hub.
On a MacPherson strut, the top pivot point is the strut bearing, and the bottom point is the lower ball joint. On a suspension using upper
and lower control arms, the pivot points are where the upright connects to the control arms. The inclination of the steering axis is
measured as the angle between the steering axis and the centerline of the wheel. This means that if your camber is adjustable within the pivot
points (i.e. Volkswagen) you can change the SAI, thus alter your scrub radius, that alter the width and offset of tyres you can safely run on your car.
The net effect of running an offset LESS in the positive is poor steering control and it develops what is known as "tram lining" over uneven surfaces (The wheels pull to either side. This also encourages instability at high speed. Such effects can be lessened by setting front wheel alignment to neutral, but in many cases it is simply unwise to use a wheel that alters the scrub radius of a car. This is why some insurance companies will not pay out on an accident involving a car that has after market wheels.
Large positive values of scrub radius, 4 inches or 100 mm or so, were used in cars for many years. The advantage of this is that the tire rolls as the wheel is steered, which reduces the effort when parking. This also allows greater width in the engine bay, which is very important in some compact sports cars. Scrub Radius is very important in regards Wheel Alignment and steering stability.
If the scrub radius is small then the contact patch is spun in place when parking, which takes a lot more effort. The advantage of a small scrub radius is that the steering becomes less sensitive to braking inputs, in particular.
An advantage of a negative scrub radius is that the geometry naturally compensates for split mu braking, or failure in one of the brake circuits.
For an illustration look here: http://www.miata.net/garage/offset.htm
3 & 4) Dimensions of a wheel
The diemnsions of a wheel are measured on the tyre's bead/wheels 'shoulders', not on the outer rim.
This graph may help you to determine where to take measurments: Dimensions.jpg (28kb)
The dimenions of a wheel are always given in inch. There's a fast code system to precisely determine a wheels dimension and characteristics. Usualy it is widthxdiameter" in inches. But there are more acronymic codes somtimes. The following example is explanatory for those codes:
Example for a wheel description: 7Jx13 H2 ET15, (PCD) 5x100
Those acronyms stand for the following:
PCD or Pitch Circle Diameter is the diameter of a circle which runs trough the middle of all bores for the wheel studs.
A Mini has a PCD of 4x4". The first number indicates the amount of holes; in this case 4.
The second number indicates the diameter of the circle; here 4" (=101,6mm).
Most common (on other cars) is a circle of 4,5" and 100mm. Eventhough 100mm seems a minor difference to the Mini's 101,6mm it is strickly recommendet to NOT USE wheels with a 4x100 PCD on a Mini!! It will stress the wheel studs and the may suddenly fail! You may risk your life and the lifes of others!!!