The M340i wheel spacers are usually used to improve the wheel stance and performance. By spacing the wheels out, they allows you to fit wider tires and a big brake kit. Every car would leave a certain wheel gap for slight changes in tire size. However, most cars look better when the wheel gap is not so pronounced and the tires are flush with the fender.
Besides, these M340i wheel spacers increase the track width. A wider track means more grip in almost every application. Even if you don’t change the tires, the more track width, the better the handling of curves and swerving. With so many options available, what BMW M340i wheel spacers are best? In this post, we will explore the safe sizes and top brands.
Best M340i Wheel Spacers Size Chart
Thickness:
There are several factors that determine how thick BMW M340i wheel spacers you need to achieve a perfect flush fitment. The first thing to consider is your wheel clearance. Take a straight edge and place it against the outermost part of the rims/tires.
Then measure from the outside wheel to the fender line to see how much space you have available. If the value is 12mm, then it is recommended to use 12mm wheel spacers. Here are the sizes for reference only:
- 3mm to 10mm: Ideal for fitting a big brake kit while keeping OEM-like style.
- 12mm to 20mm: Provides a better wheel stance while improving the ride quality.
- 25mm to 35mm: Provides a wider track to enhance stability and rollover resistance.
- 40mm to 50mm: Provides more clearance to fit a wide-body kit without rubbing issues.
Bolt Pattern (PCD):
Figuring out the correct bolt pattern (PCD) of BMW M340i is the first thing when researching and shopping for wheel spacers. For example, the 2026 BMW M340i: PCD=5x112mm, CB=66.5mm, Thread=M14x1.25mm.
Correct Offset:
Wheel spacers reduce the offset. For example, if the 2026 BMW M340i stock wheel offset is +25mm, then a 12mm spacer will make the final offset +13mm. Make sure the wheel offset is correct especially you switch to aftermarket wheels.
What M340i Wheel Spacers Are the Best?
Safety, precision, strength, and best experience are what sets BONOSS apart from other spacer manufacturers. All BONOSS forged lightweight plus M340i wheel spacers are built strictly to meet international standards that can improve the quality of your own driving experience. BONOSS offers several key advantages that make their spacers a top choice.
1. Extreme Lightweight for Better Performance
As we all know, the lighter the unsprung weight is, the better the handling capabilities. BONOSS forged lightweight plus M340i wheel spacers are machined with “Hollow Carved” holes. Compared with the previous production, they are at least 20% lighter. The weight of these BONOSS wheel spacers is quite insignificant, and they won’t damage any suspension parts.
2. Aerospace Materials for Improved Strength
BONOSS forged lightweight plus M340i wheel spacers are made of 6061-T6 and 7075-T6 aluminum alloys. The 6061-T6/ 7075-T6 aluminum alloy is high-quality aluminum that has excellent corrosion resistance and high toughness. The tensile strength is up to 572 MPa (AL7075-T6). They are strong enough to handle various driving conditions.
3. Strong Fasteners for Enhanced Stability
To ensure safety, BONOSS provides ISO grade 12.9 wheel bolts. These lug bolts will undergo a series of safety tests before leaving the factory. The results of those performance tests are great: tensile strength≥1,282 MPa, proof load≥121,000 N. They are all approved by over 75 SGS and TÜV authoritative certification reports.
In Summary: Unlock More Wheel Options with BONOSS
From advanced lightweight plus advantages to customizable solutions and certified quality, BONOSS forged lightweight plus M340i wheel spacers are designed to provide a safe, reliable, and enhanced driving experience. Choose BONOSS and experience the difference—engineered for those who demand the best.
(Hi, I’m Kevin Brian, an experienced mechanical engineer. All articles, images, and videos are human-produced to ensure the best user experience. They are not generated by Artificial Intelligence (AI) Models or tools.)
