BONOSS Forged Lightweight Plus Hubcentric PCD5x120 CB74.1 Wheel Spacers AL7075-T6 for BMW 5 series E39 1995-2004/M5 1998-2003

1. What are the benefits of the “Lightweight Plus” design of BONOSS forged Lightweight Plus wheel spacers?

The “Lightweight Plus” of wheel spacers means that the hollow design is further optimized on the basis of the traditional wheel spacers. It is an effective design that can effectively reduce weight and energy consumption, improves handling while ensuring safety and reliability. Compared with the previous generation product, the weight is reduced by 20%, the reducing unsprung weight helps the vehicle suspension system work more effectively. The overall acceleration of the vehicle and the overall comfort of the handling performance is better, and the driving is safer. BONOSS forged Lightweight Plus wheel spacers provide higher performance, more additional functions, fast customized service, and friendly service while maintaining a more friendly price, which is your best choice.

2. What’s the data of my BMW E39 wheel spacers?

The data of BMW E39 wheel spacers is Bolt Pattern (PCD):5×120, Center Bore (CB):74.1, Thread: M12x1.5. These items are also compatible with vehicles in the same bolt pattern, center bore diameter, and thread size as E39 525i 1995-2004/M5 1998-2003. For details, please check Are these wheel spacers compatible with my vehicle.

3. Are BMW E39 wheel spacers safe?

Generally, wheel spacers are made of steel or aluminum. They are just the automobile accessories installed between the assembly hub and wheel. As long as you use high-quality BMW E39 wheel spacers and install them properly, they are safe. Take the BMW E39 M5 5×120 wheel spacers as an example, we use forged AL7075-T6 material (tensile strength ≥572Mpa), modern CNC machining by 0.02mm tolerance. All of our products have got more than 50 SGS TUV authoritative test reports. Compared with those cheap casting wheel spacers, BONOSS forged Lightweight Plus wheel spacers are safer, higher performance, and more professional in design. We believe more professional production offers more value for customers. For details, please check Are Wheel Spacers Good or Bad.

4. Will BONOSS BMW E39 wheel spacers cause vibration?

In fact, the wheel spacers just increase the track of the left and right wheels. When the wheelbase increases, the grip will also increase. BONOSS BMW E39 wheel spacers are designed to make a snug connection between the wheel and vehicle hub, reducing high-speed vibration and ensuring safer driving. Compared with ordinary hub centric wheel spacers, BONOSS uses the multi-stage hub centric design and precision 0.02mm CNC machining, which effectively guarantees the safety and reliability of the wheel spacers’ quality and provides higher stability. The multi-stage hub-centric can make the spacers more closely fitted to the wheel hub, greatly reduce the vibration of high-speed caused by the inaccurate hub centric, For details, please check Why do You Need Wheel Spacers with Hub Centric Rings.

5. What are BONOSS BMW E39 wheel spacers made of?

BONOSS forged Lightweight Plus wheel spacers for BMW E39 are made of high-grade 7075-T6 aluminum alloy. They are formed by withstanding continuous strong pressure that improves the strength of the wheel spacers. And the aluminum alloy has many excellent characteristics, such as high strength, wear-resistance, impact resistance, and high-temperature resistance, performs good mechanical properties: Tensile Strength≥572Mpa, Yield Strength≥503Mpa, and Failure Elongation≈11%. Compared with ordinary AL7075 materials, the tensile strength and yield strength are about five times higher. BONOSS insists on producing professional forged wheel spacers, which are safer, more professional. For details, please check How to Choose Safe Wheel Spacers.

6. What’s the performance of the BONOSS forged grade 12.9 extended wheel bolts on BMW E39 wheel spacers? What’s the special meaning of BONOSS engraved?

BONOSS forged grade 12.9 extended wheel bolts are made by the forging process which brings excellent mechanical and physical properties. Each of them is engraved with “B”, which means that these are manufactured by BONOSS own factory, the quality is guaranteed. They have achieved ISO standard grade 12.9, tensile strength≥1,220Mpa, ultimate tensile load≥152,000N, hardness (HV)≥395, NSS≥500H, two million times limited life range test without damage… They are strong enough to use in daily driving, off-road, and other scenes. The head of the extended wheel bolt has a 12 petal shape, this design is proof of the Super Forging Process (the petal-shaped can only be manufactured by a large tonnage machine for forging at one time.). For those wheel bolts that are only marked in metric units without branding, BONOSS wheel bolts are safer and more reliable. For details, please check How to Improve Wheel Spacer Safety.

7. Can I customize BMW E39 wheel spacers only in 3 days?

BONOSS owns an independent OEM factory, so that custom wheel spacers can be completed only in 1-3 days. OEM/ODM is available. If you’re looking for an unusual thickness or bolt pattern conversion to fit custom wheels that won’t work with standard wheel spacers, look no further than BONOSS custom-made wheel spacers for your BMW E39. BONOSS offers non-normal thickness customized service, a minimum of 0.1″ (3mm) thick, a maximum of 6.4″ (160mm) thick are available. There are a large amount options with our customized PCD conversion wheel adapters, etc. 5×120 to 5×114.3 adapters, 5×100 to 5×120 adapters, 5×120 to 5×112 adapters, 5 lug to 6 lug adapters, and thread sizes, thicknesses, and bolt patterns are customized to your exact request on wheel adapters. For details, please check BONOSS Custom Wheel Spacers Service.

8. Do you have any SGS TÜV test reports of BMW E39 wheel spacers?

SGS and TÜV Rheinland as the world’s famous testing service companies, standing for safety and quality. To earn customers’ trust, which is also our confidence in product quality. BONOSS has fully passed over 66 ISO standard SGS, TÜV authoritative tests, and all achieved excellent scores.BONOSS forged grade 12.9 extended wheel bolts have passed the SGS 2,000,000 times limited life range test without damage, tensile strength≥1,282Mpa, ultimate tensile load≥152,000N, hardness (HV)≥395, NSS≥500H… By these authoritative test reports, BONOSS truly achieves the quality and professionalism expressed in the form of data and truly guarantees safety. We believe high standard quality management, together with authoritative certification reports is the best way to meet customer and regulatory requirements. For details, please check BONOSS Wheel Spacers Quality Certificated.

9. What are the benefits of the knurling design on my BMW E39 wheel spacers?

The knurling design can enhance the aesthetics of the BMW E39 wheel spacers by introducing an attractive pattern to the side surface. In addition to aesthetics, there are practical features. Knurling patterns can enlarge the side area so that it can contact more air, boost the heat dissipation effect, and reduce the internal stress caused by machining. That means improving the performance, strength, and durability of the BMW E39 wheel spacers. BONOSS aims to provide wheel spacers with more additional functions, safer, higher performance, more professional design, and better installing experience, that is why we insist on independent manufacturing and continuous optimization of the design. For details, please check Are Wheel Spacers A Good Idea.

10. How do BMW E39 wheel spacers affect handling?

Installing wheel spacers is a cost-effective way to increase the wheel track by pushing your wheels away from the hub. A wider track means better traction, allows you more stable turning, improving the handling of your vehicle, even driving in bad weather, it won’t lose its grip. Moreover, most track racing cars will use every millimeter of wheel space available in their design for the highest performance and the best exteriors. With BMW E39 wheel spacers on, you can fill the gap in your fenders and get a more aggressive and powerful look. Meanwhile, BONOSS forged Lightweight Plus wheel spacers are accurate to 0.02mm, a more perfect fit to the wheel hub, which means that high-speed vibration is reduced, and offers a smoother driving experience. For details, please check Wheel Spacer Handling Improvement.

11. What wheel spacers do I need fit for “HRE/WORK/BBS…” wheel rims on my BMW E39?

An excessive positive offset will cause the inner edge of your rims and tires to rub against the suspension components. In this case, wheel spacers can create the clearance needed to avoid friction and correct the offset by pushing away from the vehicle hub. They can also be used to change the bolt pattern and center bore diameter of your car. In this way, modified rims with different data can be installed correctly. For example, BBS wheel rims, HRE wheel rims, WORK wheel rims, OZ wheel rims, etc. BONOSS has thousands of successful cases of manufacturing spacers for aftermarket wheel rims issues. Compared to those cheap casting spacers, BONOSS forged high-grade wheel spacers are safer and more professional. For details, please check When to Use Wheel Spacers for Aftermarket Wheels.

12. Can BMW E39 wheel spacers clear the clearance problem after replacing the “BREMBO/AP…” brakes?

Higher-performance brake kits are often bigger than the stock parts. A wheel spacer provides the space needed for larger calipers that cannot fit in the factory wheel space. By pushing out the wheels, you can get a larger ideal gap of the brake caliper without having to rub it when installing the wheel. These items function as Brembo wheel spacers, EBC wheel spacers, AP racing wheel spacers, Endless wheel spacers, etc. And for safety and quality, purchasing from a professional manufacturer is trustable. BONOSS has thousands of successful cases of manufacturing spacers for big brakes issues. Compared to other cheap casting wheel spacers, BONOSS forged Lightweight Plus wheel spacers are safer and more professional. For details, please check When to Use Wheel Spacers for Big Brake Kit.

13. What do wheel spacers do for wide-body kits/aero kits?

The wide-body enclosure usually includes large brake calipers and large wheel hub modifications. Wheel spacers allow you to install larger wheels and larger brakes which is a great safety upgrade especially if you plan to take your widebody car onto a track. Installing wheel spacers on BMW E39 is one of the easiest and most cost-effective options to get low and wide as well as to get flush the fender flares. Properly filled wheel arches can really make your widebody builds look wonderful. These items function as Mansory widebody kits wheel spacers, Brabus widebody kits wheel spacers, Liberty Walk widebody kits, etc. BONOSS offers 3mm-20mm thickness wheel spacers to meet your needs. BONOSS insists on manufacturing safer and more professional wheel spacers, which is a good choice for your excellent widebody kits. For details, please check When to Use Wheel Spacers for Wide-body Kit.

14. Can BONOSS wheel spacers solve the offset problems for install other vehicles’ wheels on BMW E39, such as “Mercedes Benz, Porsche…”?

In a sense, a wheel adapter is also a wheel spacer. Wheel spacers are used for clearance problems with brakes, tie rods, and other suspension components, to push the wheels outward and make the wheels more flush with the fender. Wheel adapters do all the same things as wheel spacers do. However, wheel adapters can change the bolt pattern and center bore diameter to allow you to bolt up wheels that are not made for your car. Installing wheel spacers can help you perfectly solve the problem of the wheels. To have better turning performance, smoother driving experience, and fuller appearance. For details, please check Do you need wheel spacers or wheel adapters.

15. How thick BMW E39 wheel spacers do I need?

Here is a simple method: use a straight edge such as a metal ruler, place the straight edge on the outermost part of the rims where the wheel comes closest to the fender (preferably the top), then, measure from the outside wheel to the straight edge. This distance is the size spacer you will need to achieve the look that flushes or nearly flushes with the fender line. Too thin, you will still have wheel/caliper interference. Too thick, and your tires will hit the fenders. Use proper size of spacers not only ensure safety but also avoid breaking your local laws and regulations. Currently, BONOSS provides 3mm-20mm thickness wheel spacers to meet your needs. For more information, please check How to Measure Wheel Spacers for My Vehicle.

16. How to install BONOSS BMW E39 wheel spacers?

The wheel spacer installation is an easy job for you. Hopefully, the instructions below can help those of you keen to install wheel spacers yourself. Please check How to Put Spacers on Wheels.

17. Where can I buy wheel spacers near me?

BONOSS will have operated stores around the world, you can find the nearest operated store through Wheel Spacers Near Me, or place an order on our official website to purchase our products.