What Is JJ In Rims?

You have probably heard the term JJ in rims. But do you know what that actually is? If the answer is no, then the truth is you have been in the dark. What Is JJ In Rims?

What Is JJ In Rims?

JJ refers to the contour of the bead seat on the wheel, essentially its shape ( “J” indicates the shape of the letter J).

Product Recommendations:

What Does JJ Mean On A Wheel?

JJ is the industry standard for rim width measurements. For example, if a rim size is stated as 18×7 JJ, the first number (18) is the diameter of the wheel in inches and the second number (7) is the width of the wheel in inches. The “JJ” simply means that this is the width measurement used by automakers.

What Is The Difference Between J And JJ In A Wheel Rim Flange?

The flange is the part of the rim that the tire bead sits against. The flange has two lips, one that sits on top of the lip, and one that is on the inside to contain the spokes (the spoke holes are in this inner lip).

The J and JJ designations refer to the shape of these two lips. A J rim has a much deeper lip than a JJ rim. In general, the deeper lip causes more friction between the tire and rim, which slows down acceleration and cornering. It also creates a larger contact patch, which increases traction.

A J rim is usually better suited for very heavy riders or riders who do hard accelerations and cornering, like crit/track cyclists. A JJ rim is better suited for lighter riders or those who are less aggressive on their vehicles, like long-distance road racers.

How Wide Is 8.5 J?

The short answer is that 8.5J is a 8.5-inch wide wheel with a 5-inch offset. This is the width of the wheel (the midpoint between the inside and outside edges) in inches and the offset tells us how far in or out the mounting face of the wheel sits compared to the centerline of the car.

Let’s look at what that actually means, though.

The numbers are divided into three components: Width, Offset, and Rim Size. They are listed in that order as well, so you’ll generally see them written something like this:”8.5J”, “10J”, “15×6”, etc.

What’s The Widest Tire For A 8.5 Rim?

The 8.5″ rim width is a pretty common width for many trucks. A 295/70R17 tire is about 33″ tall and 12″ wide. That’d be a good fit on an 8.5″ wheel, but most truck manufacturers recommend a 9.5″ wheel for that size tire, so you’ll have to check your owner’s manual.

If you’re running the factory wheels, there’s probably enough room for that tire, but if it was my vehicle I’d be looking at 10″ wheels to make sure I had enough room in the wheel wells

However, if you’re not worried about wheel well clearance, go with whatever looks good to you!

What Is JJ Mounting Flange?

The JJ mounting flange is used to mount the wheel with a hub adapter to the rim. It is located inside the wheel. This type of flange is used for lightweight and robust wheels. The JJ mounting flange is completely machined from aluminum, which makes it both lightweight and stable. In addition, it’s compatible with all common rotors on the market.

A mounting flange is an integral part of the wheel. It takes the weight of the vehicle and provides a flat surface for the tire to be bolted on too. The JJ mounting flange has been built with quality and precision to ensure that it can withstand the pressures of a high-speed car. It is made from high-grade steel which has been hardened for additional strength and durability.

What Does 6.5 J Mean On Wheels?

When you’re looking into the sizing of alloys you’ll see it shown like this: 15 x 6.5J. The first half (15) is your wheel diameter, simple enough, while the second half (the 6.5J) is the wheel width. By width we mean the section between the mounting flanges on the wheel.

The J is a letter in the wheel designation, and it means that the wheel has an offset of 0mm (zero). The number 6.5 means that the wheel is 6.5 inches wide.

A wheel size of 6.5 x 16J means that the wheel is 6.5 inches wide and it has an offset of 0mm (zero).

The reason for this offset is that on many cars some wheels have different offsets to move the tire out from the centreline of the car’s body further than others to achieve a certain look or clearance for larger brakes etc.

What Does 18x8J Mean?

18: This is the diameter of the wheel. It’s the one you’re probably most familiar with, since it’s often used by manufacturers to describe their cars: “the 2019 [insert car name here] comes standard with 18-inch wheels.” If a car has 17″ wheels, then it has 17″-diameter wheels.

8: This is the width of the wheel. Specifically, this is how wide the wheel is at its narrowest point, which may be at its inside or outside edge. 8″ is a common width for many cars, but not all. Some cars use wider wheels (like 8.5″), while others use narrower ones (like 7″).

J: This is the offset of the wheel. The “offset” refers to where the mounting surface sits — in other words, where your car’s hub would actually sit on the wheel if you bolted it on. Offset can come in positive, zero, and negative numbers.

Offset can be confusing, so let’s look at an example: Imagine looking down at a tire from above as it spins on your car. If you’ve got a positive offset and your tire rubs against something like your brake caliper or suspension part, it will be rubbing on its inner edge first.

What Is The Difference Between 6.5 J And 7j?

6.5 J means the wheel is 6.5 inches wide, 7J means the wheel is 7 inches wide.

If you have a standard 7J rim on your car and change to a one-inch wider rim at 7.5J, you will increase your tire sidewall height by half an inch (12.5 mm). This means that your new tire is going to be 1 inch (25 mm) taller than your original setup.

You need to check that your car can accommodate the new tires, in terms of clearance between the tire and bodywork, as well as suspension and steering geometry.

How Do You Read Rim Markings?

Rim markings can appear on the inside and outside of a rim.

Inside: The width (measured from bead seat to bead seat), diameter, and offset of the rim are sometimes stamped on the inside of the rim. This is common on steel rims. However, these markings may be difficult to read as they are often stamped lightly and covered with a layer of paint. It may be necessary to clean the area before being able to read these measurements.

Outside: The maximum tire pressure, load rating, and speed rating are sometimes stamped on the outside of the rim. These markings are usually clearly visible.

How Can I Check The Number On The Back Of Your Tires?

The number on the back of your tire refers to the size of your tire. It’s a code that tells you the width of the tires, their aspect ratio, and the size of their construction.

There are two main measurements used for width: inches and millimeters. The first measurement is always the width, while the second measurement is always the height (or aspect ratio).

The first pair of numbers in a tire size is the width.

A tire’s width is measured in millimeters from sidewall to sidewall. While it’s possible to measure on your own, it’s easier to look at the numbers printed on the side wall of your tires.

It will be located right after the letter R (if applicable) and before the slash that separates it from its height. The next time you’re looking at a set of tires, check out their specs by looking at their sidewall.

What Is JJ In Rims – Conclusion

Once again, here’s our response to the question, What Is JJ In Rims?

JJ refers to the contour of the bead seat on the wheel, essentially its shape ( “J” indicates the shape of the letter J).

Thanks for reading.

Similar Posts