Product Summary
- 20 Inch Wheel Diameter, 10.5″ Width, 38 mm Wheel Offset
Asanti ABL14-20051238BK details
Crafted to absolute perfection. Asanti Wheels offers world class luxury wheel packages for hundreds of makes and models. With a multitude of custom designs, endless amount of finish options, in sizes from 20″-24″; your options are truly limitless in the pursuit to define your style. Discover the world of exquisite class and elegance with Asanti Wheels. Make your statement known. Set your ride apart from the pack with a unique set of Asanti Wheels.
- Features a Gloss Finish
- Wheel diameter of 20 inches with a width of 10.5 inches
- Made from Cast Aluminum
- 1-year warranty on wheel finish
KEY SPECS |
|
---|---|
MFG. Part # | ABL14-20051238BK |
Brand | Asanti |
Bolt Pattern | 5 on 4.5″ |
Wheel Diameter | 20 Inch |
Wheel Material Type | Cast Aluminum |
Width | 10.5″ |
Wheel Bolt Pattern (in.) | 5×4.5 in. |
Wheel Bolt Pattern (mm) | 5×114.3 mm |
Wheel Backspace | 7.25″ |
Wheel Offset | 38 mm |
Wheel Backspace Range | 7.00″ and greater |
Finish | Gloss |
Color | Black |
Beadlock Included | No |
GENERAL |
|
DOT-Approved | Yes |
Offset | 38 mm |
Weight | 31 lbs. |
Load Capacity | 1620 lbs. |
Notes | Gloss Black |
Valve Stem Included | No |
GTIN Code | 885463191348 |
Lug Nut Seat Style | 60 Degree Conical |
Center Cap Included | Yes |
Warranty | 1-year on wheel finish |
Lug Nuts Included | No |
Material Type | Cast Aluminum |
Wheel Offset vs Backspacing Explained
We all know that choosing the right wheel is an important part of any car project. A big part of what makes a wheel “right” is the way it positions the tire in the wheel well. Too far in and it hits the frame, too far out and it hits the fender. We’ve all been there.
There are two common ways to measure this, offset and backspacing. These two terms are often used interchangeably to discuss the relationship between the rim and the hub where the wheel mounts to the car, but they are definitely not the same thing. We’re going to discuss this here, with some illustrations, to help make sense of it all, but first we want to share some important wheel measurement definitions to help you with your wheel fitment:
- Overall Wheel Width: This is the total width outside of the wheel lip flange, usually 1-inch wider than the inside “stated width” wheel lip measurement the tire seats. This is measured without a tire mounted using a ruler or measuring tape across the wheel and is expressed in inches.
- Wheel Centerline: This is the overall wheel width measurement divided by 2 to halve the dimension, giving us the true centerline dimension of the wheel, expressed in inches.
- Backspace: This is simply the distance from the wheel mounting face (where it sits on your brake rotor or drum) to the rear outside wheel lip flange. This is measured using a straight edge across the back of the wheel (without a tire mounted helps) and a ruler or measuring tape from the mounting face to the straight edge and is also expressed in inches.
- Offset: This is the measurement between the wheel mounting face and the centerline of the wheel’s width. This one is a little harder to measure, especially on wheels that are solid or have small window openings between the spokes, and confusing enough to some it is expressed in millimeters that can be either a positive or negative dimension.
How to Measure Wheel Backspacing?
This is the one that most of us are probably used to seeing when looking at wheels for our hot rods and muscle cars. Quite simply, it’s the distance from the back of the rim to the mounting hub at the center of the wheel. With the wheel face down, throw a straight edge across the back of the rim, measure down to the center with a tape measure and you have your backspace.
An alternative backspacing measurement style some people use is to lay the wheel face up and measure through the wheel’s center hole with a tape measure or ruler from the floor surface to the backside of the wheel face. This is more commonly seen with steel wheels, as they have a larger center opening, but it can be useful for other wheel designs or as a way to double check your measurements taken with the wheel facing down as shown above.
![Measuring Wheel Backspacing-Wheel Facing Up](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/220187_ArticleSection_XXXXL_7d0e489d-b518-4ce1-b571-6403f4864a18.jpg?ssl=1)
What is Wheel Offset?
We seem to encounter offset more often when we’re looking at wheels for late-model cars. This one’s a little trickier to measure, but it’s easy to understand. Typically expressed in millimeters, offset refers to the distance between the wheel’s mounting hub and the center line of the wheel. The diagram below will make more sense of this.
![offset illustration](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/71133_ArticleSection_XXXXL_d96573bd-9161-487c-8bea-7ade0e6c665c.jpg?ssl=1)
As you can see, this distance can be either negative or positive. High positive offset wheels are typically found on front-wheel-drive cars and modern rear-wheel-drive performance cars such as Corvettes, Camaros, and Mustangs. Negative offsets yield “deep-dish” wheels commonly found on some of our favorite older cars. So, if a wheel has an offset of 50mm, that means that the face where the wheel will bolt to the hub is 50 millimeters to the outer, curb side from the wheel’s centerline. Conversely, an offset of -50mm is the opposite, 50 millimeters to the inside of the centerline, yielding a deeper “dish” in the wheel.
When bolted up to your car this means that a lower offset wheel will stick out farther. If your car was originally equipped with a +50mm offset and you replace it with a +25mm wheel, the wheel will stick out approximately one inch farther. Obviously, a negative offset works the same way. A -25mm wheel replaced with a -50mm wheel will move 1″ outward as well.
An Alternative Way to Determine Wheel Offset
Offset is the hardest wheel measurement to determine, so using the two easier to obtain dimensions of overall wheel width and backspacing we can then determine the wheel’s offset.
Let’s use a 10-inch overall wheel width. This makes our wheel centerline dimension to be 5 inches (10 divided by 2= 5). Let’s say your backspacing measurement is 5-3/4-inches. At this point we’ve taken two simple measurements and we have everything we need to calculate offset with some simple math.
Formula: Backspace – wheel centerline = offset
Any fractional answer (the 3/4 in the backspace) needs to be converted to a decimal equivalent by division first.
3 divided by 4 = .750
Our wheel sample: 5.750 – 5 = .750-inch
However, since offset is stated in millimeters, we have one more calculation to run. There are 25.4 millimeters in an inch, so multiply your answer from your first formula by 25.4 to obtain your offset in millimeters.
.750 x 25.4 = 19.05mm positive offset (wheel mounting surface towards the outside of the wheel)
If the backspace measurement is smaller than the wheel centerline measurement your offset would be negative (wheel mounting surface towards the inside of the wheel).
While the math isn’t that hard, an excellent way to determine the correct offset and/or backspacing for your vehicle is to use the actual tires you plan to run and verify their fitment in your wheel wells with a wheel fitment simulator tool like the one shown here.
![Wheel Simulator Tool](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/273922_ArticleSection_XXXXL_81127823-8250-4ea0-a11f-05d437125b33.jpg?ssl=1)
What Other Wheel Measurements Are Important?
Also worth noting are bolt circle and center bore. Bolt circle refers to the diameter of a circle drawn through the center of the wheel studs. On a four or six-lug car, this is easy to measure, simply go center to center on the holes or studs. Five lug wheels and hubs are more common to the cars that we love, and the odd number can make them a bit tricky to measure. To quickly measure on the wheel, center the measuring tape or ruler on one hole, skip a hole, then measure to the outside of the next hole.
![bolt circle measurement guide](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/71151_ArticleSection_XXXXL_731eb35e-3072-420d-9fbe-7bbc50897091.jpg?ssl=1)
There are also plenty of bolt circle templates available to help with this measurement. These make it easy to measure your bolt circle quickly and accurately.
Also critical is the center bore. This is the hole through the center of the wheel, and if it’s smaller than the protruding part of your hub or axle, the wheel will not fit. Check out our Wheel Bolt Pattern Guide to learn more about measuring all types of wheel bolt patterns.
In Conclusion
The most important takeaway here is not to confuse offset and backspacing. With that established, you can make an informed decision when selecting aftermarket wheels for your car. Don’t forget that there are tools available that can help you reach a decision. If you have your tires already, our wheel fitment simulator previously mentioned is handy to have because it allows you to actually install the tires on the car to check clearance.
How to Measure Bolt-Patterns
Bolt patterns are simply the measurement of an imaginary circle that lies across the center-line of the lugs. Whether you are looking to adapt or match a new set of wheels, we have a simple guide to help you estimate your bolt circle.
Wheel Bolt Pattern Guide
![5 lug bolt pattern measurement diagram](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/85048_ArticleSection_XXXXL_ae40f61a-36bc-4e54-8a5d-3fa1daa6749b.jpg?ssl=1)
The easiest way to estimate the 5 lug bolt pattern, is to measure from the back of a hole to the center of the second hole.
![4 lug bolt pattern measurement diagram](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/85049_ArticleSection_XXXXL_bec90f3c-b5bb-445a-be12-1715bd9c1385.jpg?ssl=1)
For a 4 lug wheel, measure center to center of two holes directly across from each other.
![6 lug bolt pattern measurement diagram](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/85050_ArticleSection_XXXXL_f702b394-6d38-4f40-88be-bf0667551709.jpg?ssl=1)
Measuring a 6 bolt wheel requires you to measure center to center of two holes directly across from each other.
![8 lug bolt pattern measurement diagram](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/85051_ArticleSection_XXXXL_ac0633f0-1914-4aec-b067-7d2ba5c7d185.jpg?ssl=1)
No need to guess any longer! Speedway Motors has a precision bolt circle template that simplifies the most common 5 lug patterns for you. Our bolt circle template and our Wheel Bolt Pattern Tool are must have tools for the shop or swap meet.
Common Manufacturer Wheel Bolt Patterns
How can you be sure that you measured correctly for your compact, midsize, fullsize, truck, or SUV? Use this wheel bolt pattern manufacturers chart to validate that you measured correctly for your vehicle’s make, year, and class. This chart covers lug patterns for Ford, Dodge, AMC, Mopar, Lincoln, Cadillac, Jeep, GM, and Chevy.
Bonus: How To Measure Backspacing
It’s important to ensure you have the correct offset on your wheels. The backspace or offset is measured from the inside lip of the wheel to the inside of the flange mount. To learn more about how to correctly measure backspacing and wheel offset check out our Wheel Offset and Backspacing Guide.
![Backspace Measurement Diagram](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/4067_ArticleSection_XL_9329ab62-7763-45c2-b31f-8222b1bc9e99.jpg?ssl=1)
Wheel Lug Nut Size Guide + Torque Spec Chart
This buyers guide explains how to select and install the proper lug nuts for your vehicle and/or aftermarket wheels in 5 easy steps.
- Seat Type
- Thread Size and Pitch
- Wrenching Type
- Appearance
- Torque Specifications
Seat Type
When asking what lug nuts fit my car or truck, determining the lug nut seat type that your wheels require is the first step in selecting the proper lug nuts for your needs. A 60 degree included angle tapered seat lug nut is a very common automotive lug nut design. The tapered seat will help center the wheel as the lug nuts are tightened and will typically yield a truer and more balanced assembly when compared to a shank or mag seat.
45 degree tapered seat lug nuts are exclusively used on circle track racing wheels. The 45 degree spec is a centerline angle measurement which makes it a 90 degree included angle. This lug nut taper is used for aftermarket racing wheel brands such as Speedway Motors, Aero, Bassett, etc. Never use 45 degree lug nuts on OEM wheels which have a 60 degree tapered seat. If your rules require 1” hex size circle track lug nuts and OEM wheels then you will need to machine the taper on your wheels to 45 degrees for a proper fit.
![Lug nut seat types](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/180084_ArticleSection_XXXXL_d7624ed4-5ecf-405d-88bc-68f972df6503.jpg?ssl=1)
Shank or mag seat lug nuts have a flat seat and typically have a washer between the lug nut and the wheel. These lug nuts must be ordered by the shank diameter and shank length that is required for your wheels. Be sure not to order a shank diameter that is smaller than your wheels require since this will likely result in an out of balance and/or out of round assembly.
E/T Ultra tapered mag seat lug nuts incorporate a tapered seat with a shank on the end. These lug nuts are used on select wheels and wheel spacers/adapters.
Thread Size and Pitch
To determine the lug nut thread that is required for your vehicle the first step is to measure the thread size. Do this by measuring the outside diameter of the wheel stud threads on your vehicle. Using a tape measure on a threaded stud is difficult to get an accurate measurement so we suggest using a dial calipers or digital calipers to increase accuracy. Common thread diameters used for lug nuts in SAE sizes are 7/16, 1/2, 9/16 and 5/8”. Common metric thread diameters are 12 mm and 14 mm.
![Lug nut thread pitch](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/180564_ArticleSection_XXXXL_6a554687-d9d2-426f-81b6-4827bc08da9d.jpg?ssl=1)
To determine the thread pitch on SAE threads you need to count the number of threads within a one inch long section of the stud. Use a tape measure to mark off a one inch section and count the number of threads. When counting be sure to only count the high points of the threads. Common thread pitch for SAE sizes are 11, 18, and 20 threads per inch making the most common SAE thread sizes 7/16”-20, 1/2″-20, 9/16”-18, 5/8”-18, and 5/8”-11.
To determine the thread pitch on Metric threads you need to find the number of threads within a one millimeter long section of the stud. Since this is extremely tough to estimate we suggest marking off a 10 millimeter long section, then after counting the threads divide your number by 10. Example: If you have 15 threads in a 10 mm section then that means there would be 1.5 threads per mm and the math looks like this: 15 ÷ 10 = 1.5
Common thread pitch for Metric threads are 1.25 and 1.50 threads per millimeter making the most common thread sizes 12 mm x 1.25, 12 mm x 1.50 and 14 mm x 1.50
Wrenching Type
Hex lug nuts are by far the most common. Easily available sockets or wrenches can be used to install or remove hex lug nuts which makes them the most popular. This allows the wheels to be removed or installed by any mechanic or tire shop when the vehicle needs service or repair. The downside is your wheels are more susceptible to being stolen when using hex lug nuts. If theft is a concern you may want to consider a set of wheel locks which are described in more detail next.
![Lug nut wrench type](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/180116_ArticleSection_XXXXL_9aa2b1e0-8620-49ce-93f8-d527ca5dc66c.jpg?ssl=1)
Spline drive lug nuts can be used to change the look or to match a wheel style. One spline drive lug nut per wheel can also be used for anti-theft purposes and are commonly called wheel locks. These lug nuts will require a very specific socket to install and remove them. Some kits come with the required socket and other kits the spline drive socket will be sold separately. A second socket for your spline drive lug nuts is a good idea in case one is damaged or lost. We recommend storing one in your toolbox at home and one in the glove box of your vehicle in case of a flat while traveling.
Hex key lug nuts provide a smooth outer appearance and are commonly used with wheels that have a very small counter bore for the lug nut to fit into. These lug nuts require a hex key to install or remove them. A benefit of this lug nut is you will not have any damage to the finish of the outer surface of the lug nuts when installing or removing them. The hex key is internal so any scuffs or scratches from the tools will be on the inside surface. With this style of lug nut you will need to carry special tools in your vehicle to remove them in case of a flat while on the road.
Appearance
Open end lug nuts are generally cheaper than other styles and used on vehicles which have hub caps that cover the lug nuts. Open lug nuts are also widely used for racing applications since some rules will require a specific amount of threads protruding past the end of the lug nut. If your rules do not specify a number of threads protruding past the lug nut then we suggest two threads minimum past the lug nut in racing applications for safety purposes.
Double sided lug nuts are primarily used in racing applications where pit stop times must be trimmed down to be as short as possible. The double sided design allows you to install the lug nut either direction so there is no fumbling around or lug nuts installed backwards.
![Lug nut color](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/180598_ArticleSection_XXXXL_1f9a153c-4a0f-42bb-96ca-937f9a9f0770.jpg?ssl=1)
Acorn lug nuts are used on all sorts of vehicles where the capped off appearance and no stud showing in the center is desirable. This provides a very clean appearance which makes them perfect for hot rods, muscle cars, show cars, and daily drivers.
The finish or color is also a consideration when buying lug nuts. Many open end lug nuts are zinc plated for corrosion resistance but they do not have the shine quality that would be desirable in some applications. A chrome plated finish provides a show quality shine that is suitable for many needs. There are also various black lug nut options to further customize the look to your particular wheels.
![Lug nut torque pattern](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/180331_ArticleSection_XXXXL_f04dbfd3-bffb-4809-8831-29ee313292c2.jpg?ssl=1)
Lug Nut Torque Spec Chart
Now that you have chosen the proper lug nuts for your needs and are ready to install them the last step is to torque them properly. To accomplish this, we suggest using a 1/2” drive torque wrench. Torque the lug nuts in two steps, starting at 40 ft/lbs of torque for your first step to get the wheel seated properly. Then for the final torque refer to our chart below for torque recommendations based on your lug nut thread size. Be sure to follow the torque sequence shown above for your specific lug count.
![Lug nut torque specs](https://i0.wp.com/content.speedwaymotors.com/ArticleSectionImages/180301_ArticleSection_XXXXL_ce732582-1258-44c6-a75d-5a5b3b6a1c52.jpg?ssl=1)
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