FAQ
Most frequent questions and answers
Black Rock, GT Form and JSR wheels are sold through major and local wheel dealers throughout New Zealand, as well as internationally. To find a dealer near you, visit our Dealer Locator Page.
Protect the finish of your new mag wheels by regularly washing them with mild soap and warm water. Before washing your rims, allow them to cool down. Never spray them with cold water while they are still hot. Steam cleaners and strong chemicals used in car washes can be damaging to the finish of your mag wheels. Make sure to use the right cleaning products, correctly.
When it comes to wheels, the bolt pattern refers to how many lugs the wheel has and the bolt circle is the way those lugs are arranged. Typically, sedan cars will have either a 4 or 5 lug pattern, while trucks and 4x4s might have 6 or 8 lugs.
Wheel offset is the measurement between the centre line of the wheel and the hub mounting surface. A positive offset indicates that the hub mounting surface is nearer to the outer edge, while a negative offset means that it is nearer to the inner edge. A zero offset means that the mounting pad is right on the wheel centerline. Selecting the wrong offset can cause the tyre to rub against either the outer fender or the inner fender well.
If you’re planning to install aftermarket wheels on your vehicle, it’s important to note that they are created to fit various types of cars. However, if you choose to mount them without using a hub-centric ring, the wheels will be centred mainly by the lug nuts. This can lead to vibrations, which can be unpleasant and even dangerous. To avoid this, it is recommended that you use hub-centric rings.
When it comes to choosing the perfect wheel size, it all comes down to your preferences for both appearance and performance. To ensure you make the right decision, seeking advice from a car wheel specialist is recommended. They can guide you in selecting the appropriate size that meets your desired look and feel, while still maintaining optimal performance levels.
If the specifications of your new wheels remain consistent, then your current tyres should fit the new rims without any issue. However, if you decide to alter the wheel width or diameter, such as by switching from a 17-inch wheel to an 18-inch wheel, your stock tyres will no longer be compatible with the new mag wheels.
It is important to note that beadlock wheels are generally not approved for road use in New Zealand. Beadlock wheels are specifically designed for off-road use and are equipped with a clamping mechanism or outer ring that firmly secures the tyre bead in place. This feature is particularly useful in off-road vehicles where low tyre pressure or harsh terrain can cause the tyre to become dislodged.
We strive to have the most accurate measurements for a wide range of vehicles. If your vehicle is brand new, it may take a few weeks for our production team to update and upload the necessary information to our website. However, if your vehicle is similar to the previous year’s model, you can try searching using the previous year’s model to find the right wheel fitment.
Steel wheels are known for their strength and durability, and they also less expensive to produce than alloy wheels. On the other hand, alloy wheels are crafted from aluminium alloy, a lightweight yet sturdy material. These wheels offer the benefits of enhanced aesthetic appeal and improved performance due to their reduced unsprung wheel weight.
Beadlock rims are commonly utilized on race or off-road vehicles that experience harsh conditions. They enable the tyre to be deflated (used at very low tyre pressures) to provide optimum grip over particularly uneven terrain.
Beadlocks employ a locking ring that is bolted over the tyre’s bead, securing it to the wheel to ensure that the tyre remains on the wheel (or that ground friction does not surpass wheel to tyre friction) even when the air pressure in the tyre is minimal.
It is important to note that Beadlocks are not road approved in New Zealand.
The information regarding the measurements of wheels is typically found on the rear face of the spokes. This information may include the width, diameter, and offset, which can be cast, stamped, or machined onto the wheel itself.
The diameter and width are usually presented in the format of (number)X(number), such as “18×9”, followed by a letter indicating the bead seat type. Offset is typically marked with an “ET” and either no prefix (positive offset) or a “-” (negative offset). While the bolt pattern may not be readily available, a search engine query that includes vehicle application data (Year, Make, Model) along with “PCD” or “bolt pattern” is likely to provide the answer.
Our wheels are compatible with wheel spacers. However, we strongly advise consulting a professional before installing them. Incorrect use of wheel spacers can lead to problems with wheel balance and drivability, as well as creating an additional potential point of failure in the attachment point between the wheel and the vehicle.
Yes, all of our wheels come complete with centre caps (if applicable).
When looking to buy aftermarket mag wheels for your vehicle, there are a few things to consider before making a purchase.
Firstly, it’s important to choose a wheel that matches the overall style and appearance of your vehicle. This is often the main reason for purchasing aftermarket wheels.
Secondly, you should also consider the build method of the wheel. Different construction techniques can affect the weight, fitment and other factors of the mag wheel.
Lastly, it’s important to decide on a price point that suits your budget. Different styles, construction methods and finishes can significantly affect the price of the wheel.
We understand that there are many factors to consider when choosing the right wheel for your vehicle, which is why we offer a wide selection of wheels to suit every style and budget.
It is recommended to occasionally consider getting an alignment for your vehicle to increase the lifespan of your tyres. Your nearby dealer can help you in inspecting your vehicle’s alignment and make necessary adjustments.
To ensure that your wheel is mounted correctly and does not vibrate, it is important to use hub centring rings that match the diameter of your vehicle’s hub and the centre bore of your wheel. These rings fill the space between the larger center bore of the wheel and the smaller hub bore of your vehicle, providing additional stability.
For example, if your wheel has a centre bore of 73.1mm and your vehicle’s hub bore is 56.1mm, you will need a hub centric ring that is 73.1mm to 56.1mm. If you are unsure which size of hub ring to use, your local dealer can help you order the correct one.
Our recommendation is to stick to the factory tyre size for optimal fitment and speedometer accuracy. However, in certain situations, using a different tyre size can have its advantages. The size of the wheel and any modifications made to the vehicle are crucial factors that determine tyre fitment. It is best to consult with your local dealer to confirm fitment and ensure safety.