| BONOSS WHEEL SPACER SPECIFICATIONS |
| Quantity |
4Pc(2 Pairs) | Certificates | Reports by TUV ISO |
| Vehicle Bolt Pattern |
5x120 MM |
Spacer Material | Forged Aluminium 6061T6 |
| Wheel Bolt Pattern | 5x120 MM | Stud Grade | ISO Grade 12.9 |
| Center Bore/Hub Bore |
74.1 MM |
Nut Grade | ISO Grade 10.9 |
| Thread Pitch |
14mm*1.25/M14x1.25 | Authorization System | Yes |
NOTES:
1.Please leave us a note with your car model and year information when you bought it. This will help our customer service team quickly identify the correct product for you and avoid any unnecessary delays. Thank you for your cooperation ;)
2. For a better shopping experience, it is important to measure the fender gap and confirm thickness before purchasing:
Measurement method: Place a straight edge on the rim’s outermost part near the fender, measure the distance from the edge to the wheel—this is the ideal thickness for a flush fender look.
Precautions: Too thin causes wheel/caliper interference; too thick leads to tire-fender contact. Correct thickness ensures safety and compliance with local regulations.
BONOSS provides various thickness options to meet different needs.
If you need any help,our friendly customer service will help you to solve any question
Fit with:
BMW：
- 1 Series (2011-2020)
- 2 Series (2013-2021)
- 3 Series (2011-2019)
- 4 Series (2013-2021)
- 5 Series (2009-2017)
- 6 Series (2011-2019)
- 7 Series (2008-2015)
- X3 (2010-2017)
- X4 (2014-2018)
- X5 M (2009-2013)
- X6 (2008-2014)
- X6 M (2009-2014)
1. What are the benefits of installing BONOSS wheel spacers on a vehicle?
Widen wheel track to enhance vehicle stability, traction, rollover resistance and handling comfort.
Improve appearance with wheels flush with fender line.
Offer a cost-effective solution for fitting custom wheels or big brake kits.
Adopt optimized hollow carved design to reduce weight by 20%, cut energy consumption and balance performance and environmental protection.
2. Why BONOSS spacers worth your choosing?
High safety: Over 66 SGS TÜV certifications, trusted by OEM brands and professionals.
Reliable strength: Made of quality materials with professional design, derived from 10+ years of manufacturing experience.
Efficient delivery: Sufficient inventory; custom products can be finished within 3 days.
After-sales guarantee: 10-year worry-free warranty.
Professional service: Pre-purchase consultation to solve confusion.
Cost-effective: High performance, rich functions and competitive price.
3. Are wheel spacers safe on vehicle?
Yes, if high-quality spacers are properly installed.
Wheel spacers have been widely used for decades, even in top-level racing.
BONOSS spacers are safe: custom-designed by actual measurement; made of forged AL7075-T6 aluminum alloy; equipped with ISO Grade 12.9 bolts and Grade 10 nuts; over 66 SGS TÜV certifications; 0.02mm precision tolerance for high surface quality.
4. Why you need hub centric wheel spacers?
Hubcentric spacers snugly connect wheels and vehicle hubs, improving support and stability and reducing high-speed vibration.
BONOSS multi-stage hubcentric design optimizes this effect, which is far better than ordinary alternatives, with more perfect fit, safety and stability.
5. What are wheel spacers made of?
BONOSS spacers are made of high-grade forged 6061-T6 billet aluminum alloy, featuring high strength, wear resistance, toughness, impact resistance and high-temperature resistance (tensile strength ≥310Mpa, yield strength ≥275Mpa, failure elongation ≈10%).
Compared with universal spacers, they undergo continuous forging to enhance strength and toughness.
0.02mm precision tolerance ensures high surface quality, safety and professionalism.
6. What’s the performance of the extended wheel bolts of wheel spacers? What does the BONOSS Engraved means?
Bolt performance: Made of high-strength JIS SCM440 steel, meets ISO Grade 12.9 standard; tensile strength ≥1,282Mpa, passes 2,000,000+ stress cycles without damage, ultimate tensile load ≥152,000N, hardness (HV) ≥395, NSS ≥192H.
BONOSS Engraved meaning: Indicates bolts are self-manufactured by BONOSS, ensuring quality, protecting customer interests, and bearing quality responsibility (different from competitors using unbranded bolts to cut costs).
7. Can I customize wheel spacers? It’s that possible to finish manufacturing within 3 days?
Customization available: Supports OEM/ODM, including non-standard thickness (0.1″/3mm–6.4″/160mm), PCD/CB conversion (e.g., 5×112 to 5×120, 5-lug to 6-lug), materials, stud thread sizes, color, decorative patterns, etc.
Manufacturing time: Independent R&D and production line enable custom spacers to be finished in 1–3 days.
8. Do you have any SGS TÜV test reports of spacers?
BONOSS has passed over 77 ISO-standard SGS and TÜV authoritative tests with excellent scores.
Extended bolts pass strict tests: 2,000,000+ stress cycles without damage, tensile strength ≥1,282Mpa, etc.
Test data proves product quality and safety, meeting customer and regulatory requirements.
9. How does knurling design work on the wheel spacers?
Aesthetic function: Adds attractive patterns to the spacer side for better appearance.
Practical functions: Enlarges side surface area to enhance heat dissipation, reduces internal stress and spacer weight, thus improving overall performance, strength and durability.
10. How do wheel spacers affect handling?
Widen the wheel track, boosting traction, body control, cornering performance and driving stability (consistent with track car design logic).
Fill the fender gap for a more aggressive look.
0.02mm precision tolerance ensures perfect hub fit, reducing high-speed vibration and delivering a smoother ride.
11. Will wheel adapters allow my vehicle to install OEM wheels of other vehicles?
Yes. Wheel adapters modify bolt patterns, center bore diameters and wheel offset to fit non-OEM wheels for Mercedes GLC-Class.
BONOSS offers various adapters (e.g., 5×112 to 5×120/5×114.3, 5-lug to 6-lug conversions) for other vehicles’ OEM or aftermarket wheels.
Properly installed adapters are a cost-effective modification solution; improper use increases driving risks.
