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Questions and answers about sports

What do these rim numbers mean?

5 min read

Asked by: Amanda Warren

What do rim size numbers mean? This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel. The wheel size also includes its width and offset.

How do you read rim numbers?

Quote from video: The second number is the diameter of an imaginary circle in inches or millimeters that runs through the center of each of the studs or in this case 170 millimeters on a 4 6 or an 8 lug wheel.

What does a rim 17×8 mean?

Wheel sizes are defined with the calculation: (diameter x width), so that a 17” diameter wheel might be 17×7”, 17×7. 5” or 17×8”. Widths tend to scale up with the diameter, so that while you will almost never see a 17×5” or a 17×10” wheel, a 14×5” or 19×10” wheel are standard sizes.

What does ET35 mean on wheels?

offset

ET35 is the offset – the distance of the hub mounting surface to the wheel’s symmetry axle expressed in millimetres.

What does et50 mean on a rim?

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.

How do you measure a 5 lug bolt pattern?

Measure from the center of one lug hole — to the center of the lug hole directly across from it. Measure a five bolt wheel from the OUTER EDGE of one lug hole — to the CENTER of the lug hole most across from it.

How do you tell what offset your rims are?

Quote from video: So it's check the ox to measure the offset here we're just going to use a straightedge. Which you're going to rest it up against the rim that we're going to take a measurement in millimeters.

What does 7j 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 wide of a tire can I fit on a 8 inch rim?

Equivalency table

Rim width Minimum tire width Maximum tire width
7,0 Inches 195 mm 225 mm
7,5 Inches 205 mm 235 mm
8,0 Inches 215 mm 245 mm
8,5 Inches 225 mm 255 mm

What does ET45 mean on wheels?

ET wheel numbers can be either positive or negative to reflect the values of wheels with either positive offsets or negative offsets. For example, an ET45 wheel measurement has a positive offset of 45mm, which means that the mounting face is 45mm in front of the centre line.

What does J mean in rim size?

Inner width of wheel in inches (6 ½ x 25.4mm= 152.4mm). J. Indicates the shape of the wheel on the place where the tyre bead sits on the wheel. x. Indicates that the construction of the wheel is one-piece.

What does 18x8J mean?

J: this is the width of the wheel from inner to outer rim in inches. so an 18x8J is 18 inches in diameter of course and 8 inches from inner to outer rim.

What does ET38 mean?

What do wheel offset numbers mean? Offset is expressed as an ET number, (ie is ET38) and the ‘ET’ is a shortened version of the German word ‘Einpresstiefe’ which means ‘insertion depth. ‘ The number is the distance in millimetres between the centre line and the mounting surface.

What is the most common 5 lug bolt pattern?

The most common 5 bolt pattern is 5 on 4-1/2. However, 5 bolt patterns also come 5 on 4-3/4, 5 on 5, and 5 on 5-1/2. It is important to know the bolt pattern before you buy new wheels to ensure a proper fit.

What are the different 5 lug patterns?

5-lug patterns consist of the following: 5×98, 5×100, 5×108, 5×110, 5×112, 5×114.3, 5×115, 5×120, 5×120.7, 5×127, 5×130, 5×135, 5×139.7, 5×150, 5×155, 5×165.1 and 5×205. 6-lug bolt patterns are manufactured for mid-size SUVs, full-size SUVs and trucks.

How do you tell what stud pattern your wheels are?

How To Understand Wheel Specs

How do you read a tire rim size?

Rim Diameter



The next number is the diameter code, in inches, of the rim onto which the tire can be mounted. For example, a tire with the P225/70R16 91S would fit a rim with a 16-inch diameter.

What do the 3 numbers mean on tire size?

B: TIRE WIDTH The three-digit number following the letter is the tire’s width (from side to side, looking at the tire head on) in millimeters. This may also be referred to as the section width. C: ASPECT RATIO The forward slash separates the tire width number from the two-digit aspect ratio.

What does ET45 mean on wheels?

ET wheel numbers can be either positive or negative to reflect the values of wheels with either positive offsets or negative offsets. For example, an ET45 wheel measurement has a positive offset of 45mm, which means that the mounting face is 45mm in front of the centre line.

Where is the part number on a rim?

The serial number for your wheels can be found inside the rim (under your rim tape). The serial is the seven digit number that typically starts with a “1” or “2”. Fun fact, usually the first 2 digits are the year in which it was manufactured.

Do rims tell you the bolt pattern?

Quote from video: Now bolt patterns are the amount of lugs you have in the diameter of the circle. That they're mounted on to get your bolt pattern.

Where are rims stamped?

Wheel markings can be found on the backside of the hub or spokes. Sometimes they can also be found on the inside edge of the rim.