and tire diameter (the size of your tire converted to millimeters) Wheel diameter = (rim diameter) + (tire diameter * 2). Search Form for vehicle model, tire size or rims Choose a tab below to get fitment data for your vehicle or to find vehicles matching your criteria. If the mounting surface is closer to the face of the wheel it is known to have a positive offset and The visualizer will show the new setup outlined in orange, the side by side comparison of the two sizes and the changes to speedometer readings. Our tire size calculator uses inch measurements by default, but you can switch to metric system (cm) if you want. It can put your life in risk while you are driving. Depending on the difference of tires, it can be in green or in red. We do this because offset does not require a wheel width to determine the correct mounting surface of the wheel. You may also click on the Offset Converter tab to convert wheel offset to backspacing and vice versa. 1010tires.com Tire Size calculator. The distance from the top of the tire to the fender well, the inside of the tire to the vehicle's suspension and frame, and the poke of the tire are all shown. In the second row you need to specify the size of the new tires, or the tires that you are going to buy. Tire size comparison calculator instantly shows the difference between the tires and displays it in the table. (adsbygoogle = window.adsbygoogle || []).push({}); Our tire size calculator will help you estimate the difference of external dimensions of the wheels, height clearance, revolutions per mile and other characteristics, when installing tires of other sizes on your vehicle. Then enter your new wheel width and offset. if the mounting point is closer to the inside of the wheel it has a negative offset. Use this calculator to determine the effect of changing your wheel width and offset. If the difference in diameters is bigger than 3%, the result will be in red. In the first box you need to choose tire width in inches. Convert wheel offset and backspacing to calculate the correct setup … There is a list of PCD and other key parameters for each vehicle on our site, just follow the link to our fitment guide database. A wheel's width is from the mounting points of the tire beads, therefore the measured width of a wheel from outside edge to outside edge is about an inch wider than spec. Slide the sliders horizontally or enter the exact number by hand to see how the demo image changes. If you plan on stretching the tires, or running wheel widths that are wider than the width of the tire then you will need to keep in mind that the visualizer is showing tire position not wheel position. Wheel offset is the distance in millimeters from the center line of the wheel to the mounting surface. View the results with our visualizer and compare key measurements for accurate fitments. This is a small concern unless you plan on running wheel widths that are well outside the manufacturer's recommended range. Wheel fitment guide for all car models by brand and year. Center or no offset is when the mounting point is directly on the centerline of the wheel. Designed by Elegant Themes | Powered by WordPress, This calculator will help you to visualize the changes in key tire and rim parameters. You can easily see the effect that each parameter has on the wheel in the picture. It is because we do not recommend using the tires which differ from your current tires in size more than 3%. This calculator allows you to tell the difference between the tires in inches, centimeters, and percentages. We are incredibly happy to announce that the new Wheel Size app is now available in the Google Play Store! First enter your current wheel width and offset. Online tire size comparison calculator – choose the right tires for your car Our tire size calculator will help you estimate the difference of external dimensions of the wheels, height clearance, revolutions per mile and other characteristics, when installing tires of other sizes on your vehicle. Use our wheel offset calculator to visualize the new tire position when changing wheel and tire sizes. If an 8" wheel has a center offset the backspacing is not 4", it is actually 4.5". In the top row you need to select the size of the tires that are on your car at the moment. Input your current tire and wheel setup including wheel offset, then add the new setup to compare positioning. Find rim sizes PCD bolt patterns and other details. this makes converting offset to backspacing not so straight forward. Use our tire calculator to compare tire sizes based on tire diameter, radius, sidewall height, circumference, revs per mile and speedometer difference. We only use an offset input for the calculator, so if you know the backspacing and not the offset simply convert it and input the offset into the field. Also calculated are the differences in tire diameter, width, aspect ratio, and revolutions per mile along with changes to key measurement differences. After you have entered all the parameters, click the green button "Calculate". Use the tire calculator to populate a list of alternate tire sizes. At the bottom of the table you can see the final recommendation. Just select a wheel size and start typing either offset or backspacing and the equivalent will be shown. WheelPCD.co.uk - your first choice wheel information data source. With this tool you may easily preview the current setup against the one that you are planning to use. Wheel ET offset explained with charts and picture examples. In this case the wheel may be closer/further than the calculated distances of key measurements. The third field is for disc diameter in inches. Wheel backspacing is the distance in inches from the mounting surface to the inside edge of the wheel. The second box is for height and width ratio in percentages. Wheel circumference = Wheel diameter * PI. Calculate differences in both tire size and wheel offset positioning for new wheel and tire setups. These indicators can be easily found on the sidewalls of your tires. 25" Tire Diameter 135/70R18 = 25.4X5.3R18 155/60R18 = 25.3X6.1R18 215/45R18 = 25.6x8.5R18 225/40R18 = 25.1x8.9R18 235/40R18 = 25.4x9.3R18 245/40R18 = 25.7x9.6R18 Since the tire wraps around your rim, the wheel diameter includes the tire on both sides (thus the multiplication by 2). Wheel Fitment for any car, your search … Wheel width will effect the tire width by 1/10" on each side for ever 1/2" change in wheel width. This calculator also gives the option to compare wheels, to compare the offset and the backspace of one or more additional wheels to the original wheel. There is a list of PCD and other key parameters for each vehicle on our site, just follow the link to our fitment guide database. An 8" wheel will measure 9" from side to side, Use our wheel offset calculator to calculate the difference in wheel and tire position when switching to different wheel offsets/backspacing or tire size. Related articles: Wheel Markings