1. Are Mercedes Benz W251 wheel spacers safe?
In general, the material of these R-Class W251 wheel spacers is steel or aluminum. They are installed between the hub assembly and wheel, pushing the wheels out and increasing the wheel track. The Mercedes Benz W251 spacers are safe as long as you use the high-quality ones and install them correctly. The tensile strength of W251 wheel spacers can resist great tension before breaking. Compared with some cheap cast wheel spacers, BONOSS forged wheel spacers are safer and stronger, the tensile strength ≥ 310Mpa (AL6061-T6), and the tensile strength of cheap spacer is about 125Mpa. When faced with bumps and impact loads, the higher tensile strength can withstand greater force without breaking. For details, please check Are Wheel Spacers Good or Bad.
2. What are the size of Mercedes Benz W251 wheel spacers?
The data of Mercedes Benz W251 wheel spacers is Bolt Pattern (PCD):5×112, Center Bore (CB):66.5, Thread: M14x1.5
At the same time, the 5×112 wheel spacers can also be used as Mercedes-Benz AMG R63 wheel spacers, Mercedes-Benz R350 wheel spacers, Mercedes-Benz R500 wheel spacers, and Mercedes-Benz R300 wheel spacers.
For more detail, please click Are these wheel spacers compatible with my vehicle.
3. Will BONOSS Mercedes Benz R-Class W251 wheel spacers cause vibration?
Actually, the wheel spacers just increase the wheel track and the grip. Mercedes Benz W251 wheel spacers can be used to correct the offset or solve the gap problem of larger brake kits. We recommend using the hub-centric wheel spacers, they can provide a better support and stability system. Their design purpose is to establish a tight connection between the wheel hub assembly and the wheels to ensure that the wheels bear the weight of the car. To make the spacer more fit the wheel hub assembly, the BONOSS spacers adopt the multi-stage hub-centric design and precision 0.02mm CNC machining, which effectively guarantees the safety and reliability of spacer quality and provides higher stability. Thereby reducing high-speed vibration, so it is safer. For details, please check Why do You Need Wheel Spacers with Hub Centric Rings.
4. What are the benefits of the “Lightweight Plus” design of BONOSS forged Lightweight Plus wheel spacers?
Lightweight Plus means that the hollow design is further optimized based on common wheel spacers. It can effectively reduce weight and improve handling performance under the substitution of ensuring safety and reliability. Compared with the previous generation product, the weight is reduced by 20%, and the weight is reduced, making the system works more efficiently. The overall comfort of the overall acceleration and handling performance is better, and the driving is safer.
5. What are Mercedes Benz W251 spacers make of? How do they stand out from the common?
BONOSS forged Mercedes Benz R-Class W251 wheel spacers are made of high-grade 6061-T6 aluminum alloy. Due to the continuous stress cycle and deformation process, forged wheel spacers become stronger and stronger, and their strength is greatly improved. This metal has good mechanical properties and taking AL6061-T6 as an example, its tensile strength ≥ 310Mpa, yield strength ≥ 275Mpa, and failure elongation ≈ 10%. Compared with industry standards, the cheap spacers which using low-quality materials are not strong enough and will deform and endanger driving safety under strong impact. In contrast, BONOSS insists on producing professional Mercedes Benz W251 wheel spacers far higher than the industry’s safety and professional standards. For details, please check How to Choose Safe Wheel Spacers.
6. What is the performance of the BONOSS forged grade 12.9 extended wheel bolts on Mercedes Benz R-Class W251 spacers? Why does each have the BONOSS engraved?
Compared with other wheel bolts, BONOSS extended wheel bolts have many advantages. The main advantages include high tensile strength, excellent toughness, and higher fatigue strength, uniform and compact internal structure. They have reached the ISO standard, tensile strength ≥ 1282Mpa, ultimate tensile load ≥ 152000N, 2 million times of fatigue strength test without damage, hardness (HV) ≥ 395, NSS ≥ 192H… It has a 12 petals head design, and the petals head can only be manufactured by the super forging process, and this uniform distribution requires a large tonnage machine for forging and forming at one time. Many brands often use other bolts and nuts that are only marked with metric units to reduce costs. BONOSS has its own factory, by engraving the word “B” on each BONOSS extension wheel bolt to show the guarantee of quality and the protection of customer interests. For more detail, please click How to Improve Wheel Spacer Safety.
7. Can I customize Mercedes Benz W251 spacers with special thicknesses and data? Can it be customized within 3 days?
BONOSS has an independent OEM factory, so customized Mercedes Benz W251 wheel spacers can be completed within 1-3 days at the fastest. Besides, BONOSS provides OEM/ODM too. If you need Mercedes Benz W251 wheel spacers with special thickness or bolt pattern conversion to install the wheels with different data, the BONOSS custom spacer is your best choice. BONOSS provides customized services of special thickness, the thinnest thickness is 0.1″(3mm), the thickest thickness is 6.4″ (160mm). There are a lot of choices for our customized PCD conversion wheel adapters, such as 5×112 to 5×120 adapters, 5 lugs to 6 lugs adapters, 5×112 to 5×130 adapters. So that the color, thickness, and pattern style can be customized according to you. For more detail, please click BONOSS Custom Wheel Spacers Service.
8. Why do BONOSS Mercedes Benz R-Class W251 wheel spacers have SGS and TUV test reports?
That’s not only for getting the trust of customers, this is also BONOSS’s confidence in product quality. BONOSS has completely passed more than 66 ISO standards SGS, TÜV authoritative tests, and achieved excellent results. BONOSS matching wheel studs have passed SGS 2,000,000 times the limited life test, without damage. Taking M14x1.5 wheel studs as an example, tensile strength ≥ 1282Mpa, ultimate tensile load ≥ 152000N, hardness (HV) ≥ 395, NSS ≥ 500H… Through these authoritative test reports, BONOSS truly achieves the quality and professionalism expressed, in the form of data, which truly guarantees safety. BONOSS believes that high standards of quality management and authoritative certification reports are the best way to meet customer and regulatory requirements. For more detail, please click BONOSS Wheel Spacers Quality Certificated.
9. What are the benefits of the knurling design of Mercedes Benz R-Class W251 wheel spacers?
The knurling design can expand the side which can heat dissipation contact area so that it can contact more external cold air, enhance the heat dissipation effect, and reduce the internal stress of machining. Besides, upgrading the performance, strength, and durability of the wheel spacers. On the other hand, adding the knurling design on the side enhance the aesthetics of the Mercedes Benz W251 wheel spacers. BONOSS aims to provide more additional functions for the Mercedes Benz R-Class W251 spacers, and make the spacers safer, higher performance, and have a better installation experience. This is the reason why BONOSS insists on independent manufacturing and continuous optimization of the design. In addition to practical functions, there is a sense of art. For more detail, please click Are Wheel Spacers A Good Idea.
10. What is the difference in vehicle handling experience after installing BONOSS Mercedes Benz W251 spacers?
Wheel spacers are a cost-effective way to increase the track without changing the wheels. As the width of the track increases, the overturn resistance is enhanced, and the weight of the vehicle is evenly distributed on all wheels, thereby improving the ride comfort. When the wheelbase increases, the vehicle’s grip is also enhanced, which is very effective when the vehicle is turning. When the offset of the wheel is insufficient, the wheel spacer will compensate for the custom offset by pushing the wheel away from the hub. Large brake kits can be installed without rubbing the suspension parts by pulling the wheels out of the ideal distance. The tolerance of the BONOSS wheel spacer is 0.02mm, which is more suitable for the wheel hub, reducing the vibration of the vehicle at high speed and providing a smoother driving experience. For more detail, please click Wheel Spacer Handling Improvement.
11. What kind of Mercedes W251 spacers should I choose to fit other brand wheel rims such as BBS wheel rims, Vossen wheel rims, OZ wheel rims?
Mercedes W251 wheel spacers, wheel studs, and lug nuts are equally important to the wheel. An excessive positive offset will cause friction between the inner side of the rims and the suspension components. In this case, installing wheel spacers can provide the clearance required to avoid friction between the inner side of the rims and the suspension assembly, and correct the deviation by pushing away from the rims. Mercedes Benz R-Class W251 Wheel spacers can also be used to adapter the car’s pattern and center bore diameter. In this way, aftermarket rims with different data can be installed. For example, BBS wheel rims, AMG wheel rims, AEZ wheel rims, Antera wheel rims, OZ wheel rims, and Vossen wheel rims. Compared with those cheap cast spacers, BONOSS Mercedes W251 spacers are safer and more professional. For more detail, please click When to Use Wheel Spacers for Aftermarket Wheels.
12. How do I choose Mercedes Benz W251 spacers for avoiding the problem after installing Prior Design brakes, AP Racing brakes, Brembo brakes, or other brands?
High-performance brake kits are usually larger than car parts, and the caliper usually cannot be accommodated in the original rim space. By replacing a larger rim, a suitable gap can be obtained and avoiding friction between the rim and the brake caliper. If you have installed a larger brake caliper and want to fix the current wheel on the vehicle without scratching, installing the Mercedes W251 spacers will be the most cost-effective solution. Mercedes R-Class W251 wheel spacers can be adapted to Brembo wheel brakes, AP Racing wheel brakes, Prior Design wheel brakes, EBC wheel brakes, Endless wheel brakes, and Alcon wheel brakes. Compared with those cheap cast spacers, BONOSS Mercedes Benz W251 spacers are safer and more professional. For more detail, please click When to Use Wheel Spacers for Big Brake Kit.
13. What kind of Mercedes Benz W251 spacers do I choose to fit the body kit or aero kits?
Usually, wide-body kits including the upgrades of larger-size wheels and bigger brake kits, and the Mercedes Benz W251 spacers allow adding larger wheels and larger brakes. This is a very safe upgrade if you are going to drive a wide-body car on the track. Installing spacers is the simplest and most effective modification to low the chassis, widen the wheel track and make the wheels flush with the fenders. Mercedes Benz R-Class W251 wheel spacers can be matched with AMG wide-body kit, Brabus wide-body kit, Carlsson wide-body kit, Liberty Walk wide-body kit, and Hamann wide-body kit. BONOSS Mercedes Benz W251 wheel spacers have 3mm-20mm thick for choosing. For more detail, please click When to Use Wheel Spacers for Wide-body Kit.
14. How to choose Mercedes Benz W251 wheel adapters for installing Audi wheels, BMW wheels, Porsche wheels, or other else?
For the same wheel bolt pattern, we can customize a 3mm to 160mm wheel adapter to fit the wheel, and what you will need to do is check the thickness you need and contact us. In some sense, the Mercedes Benz W251 wheel adapters also play the role of wheel spacers increasing the wheel track. Because wheel adapter can push the wheel outward too, and make the wheel flush with the fender. At the same time, it can also be used to solve the gap issue of brakes, tie rods, and other suspension parts. Compared with spacers, Mercedes Benz R-Class W251 wheel adapters can change the PCD and the diameter of the center bore so that you can install wheels with different data. In brief, installing wheel adapters make the vehicle obtain better turning performance, a smoother driving experience, and a fuller appearance. For more detail, please click Do you need wheel spacers or wheel adapters.
15. How to measure and determine the thickness of the Mercedes Benz W251 spacers?
Use a straight edge or metal square, to attach it to the outer side of the wheel and the inner side of the fender for measurement. The distance range is the choice of the thickness of the spacer with a flush or almost flush appearance with the fender. If the spacer is too thin, you will still be affected by the wheel or caliper, if it is too thick, the tire will hit the fender. Therefore, the use of spacers of appropriate thickness can not only ensure safety but also avoid violation of local laws and regulations due to the overly prominent appearance of the wheel. At present, BONOSS Mercedes Benz W251 spacers have a thickness of 3mm-20mm for choosing. For more detail, please click How to Measure Wheel Spacers for My Vehicle.
16. How to install Mercedes Benz W251 wheel spacers?
Installing Mercedes Benz W251 wheel spacers is very easy, please click How to Put Spacers on Wheels to get the correct installation steps.
17. Where can I buy Mercedes Benz R-Class W251 wheel spacers near me?
You can place an order directly here, or click this link to view the dealer near you to make a purchase. For more detail, please click Wheel Spacers Near Me.
1. Which express will deliver my Mercedes Benz W251 spacers? How much does the shipping cost? Does it include import tax?
After placing the order, BONOSS’s shipping department will give priority to choose FEDEX, DHL, TNT, UPS, EMS, or other express delivery for you, and then deliver your Mercedes Benz W251 spacers as soon as possible. The shipping cost calculation is based on the shipping weight and volume and doesn’t including import tax. Also, the special service fees in remote areas are not included but will be charged in rare cases. If this happens, we will contact you in advance.
2. How soon will my Mercedes Benz W251 wheel spacers ship?
Generally, existing Mercedes Benz W251 spacers are ship within 24-48 hours, and the customized spacers are ship in about 3 days (some special custom orders or models may take longer). Once your Mercedes Benz W251 spacers are shipped, we will provide you the tracking number by email. Please pay attention that if you have not received the tracking number or have other questions, please contact our friendly customer service staff.
3. How soon can my Mercedes Benz W251 spacers arrive?
The general time is 3-7days, but may be affected by aviation, weather, politics, customs clearance, or other factors. But don’t worry, because it usually doesn’t take long, and we will follow up the whole process so that your Mercedes Benz W251 wheel spacers can arrive faster.
4. Where is my Mercedes Benz W251 wheel spacer shipping address?
BONOSS has a lot of multiple distribution centers around the world, and we will give priority to choose the warehouse nearest to your delivery address or the most price-friendly area. But we recommend that purchasing from a local dealer to get your Mercedes Benz W251 spacers faster and save shipping costs. Click here to find Who sells wheel spacers near me.
5. Can I receive my BONOSS Mercedes Benz W251 spacers in my country and location?
In fact, through FedEx / DHL / UPS / TNT / EMS and other shipping channels, BONOSS Mercedes Benz W251 spacers can be shipped to most countries and regions in the world, so you don’t need to worry about it. But a few remote carriers will charge special service fees in rare cases. If this happens, we will contact you in advance. If you have any questions, please contact our friendly customer service staff.
6. What should I do if my Mercedes Benz W251 spacers encountered problems during shipping?
In rare cases, due to the reasons of a third party, the product may be damaged, lost, delayed, etc. during ship. Once this happens, or if you encounter any problems during the delivery of your Mercedes Benz W251 spacers, please contact us and we will help you strive for the best benefits.
Please attention: In some cases, when BONOSS Mercedes Benz W251 wheel spacers arrive at your local delivery place, and you will bear all responsibilities if the product is returned or destroyed due to your failure to clear customs or sign for receipt in time.