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Alloy Wheels Search
This is the diameter of the wheel, which is measured in inches from the tyre mounting surface on one edge to the opposite edge on the alloy wheel, for example 18”x8” with 18” being the wheel diameter.
This is the width of the alloy wheel which is the maximum width across the tyre mounting surface on the wheel, measured in inches for example; 18”x8” with 8” being the wheel width.
The number of holes the wheel has to bolt it to the vehicle hub. Racing nut applications are listed under 15x130 under PCD.
This is the Pitch Circle Diameter, which is the diameter of a line drawn through the centre of the bolt holes and is measure in millimetres (mm). Normally this is displayed in this format 5x112 with 112mm being the PCD and 5 being the number or holes. Racing nut applications are listed under 15x130
This is the value in kgs which the alloy wheel has been load rated to carry. The same wheel design can have different load ratings depending on the size and PCD of the wheel among other factors.
The offset is the distance between the wheel centre line and the mounting face of the wheel. Measured in millimetres (mm) and normally displayed as “ET45” on a wheel (ET45 being an example of an alloy wheel with a 45mm offset), the lower the number the further out the wheel will sit when bolted to the vehicle. Every vehicle has a permissible offset range which is dependent on a number of factors.
This is the approximate weight of the wheel in Kgs; please note every care is taken to ensure this value is accurate to +/-5% but errors can occur in our data.
This refers to the alloy wheel Bead Seat Contour, in short a slight raised hump on the alloy wheel tyre mounting face to help ensure a Runflat tyre, when driven with no air does not come off the wheel easily.
We ship worldwide.
UK & Northern Ireland: Shipping is FREE on all orders of 4 wheels, 4 tyres or 4 wheels & tyres fitted within
Mainland UK and Northern Ireland. Exceptions apply to Highlands & Islands, remote areas etc. you can view these at checkout.
Rest of the World: To find out the cost of delivery you first need to add the products which you are interested in, to the
shopping basket. At the checkout stage you will be asked for which country you want the goods shipped to. When you select your country, the
delivery price will be displayed. To find your country please select the currency most relevant:
We will contact you by phone or email to confirm that everything is ok with your order and inform you of the delivery date, before it is dispatched.
Depending on stock location, delivery can take up to 5 working days. Normal delivery is 2 - 4 working days UK & Ireland, 3 - 7 working days Rest of World. Wheel & tyre packages can take longer. We pull stock from many different warehouses and factories in the UK, Ireland, Europe, USA and Japan as such delivery times can vary as do stock levels for wheels and tyres. As always, we aim to deliver your order as quickly as possible !
At Performance Alloys.com we ensure that all alloy wheels which we sell have the correct offset for each customer’s specific car. After all we want our customers wheels to look great on their car.
What is Wheel Offset ?
The wheel 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.
Zero Offset - The plane of the hub mounting surface is even with the centerline of the wheel.
Positive Offset - The plane of the hub mounting surface is shifted from the centerline toward the front or outside of the wheel. Positive offset wheels are generally found on front wheel drive cars and newer rear drive cars.
Negative Offset - The plane of the hub mounting surface is toward the back or brake side of the wheel's centerline.
"Deep dish" wheels typically have negative offset or a very low positive offset.
To maintain handling characteristics and avoid undue loads on bushings and ball joints, the car manufacturer's original offset should be maintained when choosing new wheels unless there are overriding clearance issues.
Wheels are usually stamped with their offset using the German prefix "ET", meaning "Einpresstiefe" or, literally, "insertion depth". An example would be "ET45" for a 45mm offset.
How to Calculate the Wheel Offset ?
First, measure the overall width of the wheel (remember, just because a wheel is 18x7.5, does not mean that the OVERALL width is 7.5”. It means that the measurement between the outboard flange and the inboard flange is 7.5”). Next, divide that width of the wheel by two; this will give you the centerline of the wheel.
Overall width/2 = Centerline
After determining the centerline, measure from the hub-mounting surface of the hub to the edge of the inboard flange (if the wheel were laying flat on the ground – face up – your measurement would be from the ground to the hub-mounting surface). This is your back spacing.
Back spacing - Centerline = Offset
How to Find Wheel Offset on an Alloy wheel?
Stamped into the back of every alloy wheel will be the wheel offset. This is normally displayed as a number or a number with ET before it, e.g.: ET42, ET35, ET 3|8 below you can see some pictures from different alloy wheels on how the alloy wheel offset is printed: