# Question: What Do The Numbers On Rims Mean?

## How do I know my alloy wheel size?

Every alloy wheel should have the size on the tyre; you can find this on the outside or sometimes it is stamped on the inside of the alloys or the back of the spokes.

Contacting a specialist is a good idea if you are still unsure about what the diameter and width of your alloys is..

## How do you read numbers on rims?

Locate the stamped size on the back of the hub on the rim. This is the assigned measured size of the rim, and it is broken into three sizes: diameter, width and bolt pattern. For example, a 14 by 6 by 4.5 reading on the rim indicates that the diameter of the rim is 14 inches, and it will accommodate most 14-inch tires.

## What do the numbers on a wheel mean?

The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.

## What does 7.5 J mean on wheels?

The wheels width is usually written beside the flange shape marking – e.g: 7j, 7.5j, 8.0j. The width of the wheel is basically the area shown on the photo above and it is measured in inches. In other words, the bigger the number, the “thicker” your wheels are.

## How do I know what PCD my rims are?

The P.C.D. of any wheel or hub with an even number of holes can be measured from the inside of one hole directly across to the outside of the hole opposite. To calculate the P.C.D. of a five stud wheel or hub, measure ‘X’ from the inside of one hole to the outside of the next hole and multiply by 1.7012.

## How do rim sizes work?

The wheel size is the size designation of a wheel given by its diameter, width, and offset. … 5 in +35 designates a wheel’s diameter of 17 inches, width of 8.5 inches, and that it has a +35 mm positive offset (432 × 216 mm +35 mm in fully metric numbers). The most popular wheel size in the U.S. is the R15 (380 mm).

## Can I use 235 tires instead of 225?

Obviously, you will need a certain kind of tire depending on how you use your vehicle. Due to this, a 235 tire might not be better than a 225 tire, or vice versa, but depending on your situation, one tire might serve you better than the other.

## Can I put different size tires on my car?

…to a Friend Tire Tech: Mixing Tires As a general rule, tires should not be mixed on any vehicle unless specified as acceptable by the tire or vehicle manufacturer. Drivers should avoid mixing tires with different tread patterns, internal constructions or sizes, and use identical tires on all of…

## What is the J in rim size?

tyre bead profileThe letter “J” means a tyre bead profile. This is the marking used to define the wheel collar profile you should never ignore. Wheel collars and tyres must be compatible.

## How wide is an 8j rim?

205 tyres on 8j rimRim widthMinimum tyre widthMaximum tyre width7.0 Inches195 mm225 mm7.5 Inches205 mm235 mm8.0 Inches215 mm245 mm8.5 Inches225 mm255 mm12 more rows•Oct 12, 2011

## What does 5.5 J mean on wheels?

The width of the wheel is basically the area shown on the photo above and it is measured in inches. In other words, the bigger the number, the “thicker” your wheels are. Regarding this, what does 5.5 J mean on wheels? 5.5j is the rim width. its taken into consideration when looking at tyres sizes to fit ur ride.

## How do I know if rims will fit my car?

The two easiest ways are to check the sticker plate in your car, it should be located inside the driver side door, or look online for the vehicle specifications for your exact make and model. That should tell you the standard rim size.

## How do you read a wheel offset?

What is Wheel Offset?Zero wheel offset is when the hub mounting surface is in line with the centerline of the wheel.Positive wheel offset is when the hub mounting surface is in front (more toward the street side) of the centerline of the wheel. … Negative offset is when the hub mounting surface is behind the wheel centerline.

## Can I put wider tires on my stock rims?

To keep the suspension and speedometer functioning correctly, both the stock diameter and width of the wheels and tires needs to be maintained. As a general rule of thumb, it’s safe to fit a tire up to 20 millimeters wider than stock on the original rim.

## What is ET in rim size?

Offset is stamped on a wheel as an ET value, which refers to the German phrase “Einpress Tiefe.” ET indicates the distance between the mounting surface and the geometric centre of the wheel (the symmetry axle), usually expressed in millimetres. When the ET value decreases, the alloy wheels will protrude further out.

## Does rim width matter?

The width of the rim will influence the width of the tire. A tire mounted on a narrow rim would be “narrower” than if the same size tire was mounted on a wide rim. … The industry rule of thumb is that for every 1/2″ change in rim width, the tire’s section width will correspondingly change by approximately 2/10″.

## Do rims have serial numbers?

Located on the inside of the wheels, there is a series of markings, numbers and lettings you are going to find. … There is a surprising amount of information used in describing a tire and the wheels such are OEM, serial part, manufacturer etc. All of this is very important.

## What wheels from other vehicles will fit your car?

Typically, you can swap your rim with the one from another vehicle. However, this depends on several factors such as the size (diameter and width), center bore, offset, and bolt pattern on the respective rims. Overall, both sides should have matching features.