40mm Lug Bolt Kit - Set Of 10 is designed to provide a secure and reliable fit for wheels equipped with spacers. These longer lug bolts are essential for accommodating 10mm and 12mm spacers, ensuring proper wheel alignment and safety. Constructed from durable steel with a black zinc coating, these bolts feature an OEM-style cone seat for a precise fit. It’s important to verify the correct thread size for your specific application using the general application guide provided on the product page.

• Durable Steel Construction: Ensures long-lasting performance and strength.
• OEM-Style Cone Seat: Provides a precise fit for optimal wheel alignment.
• 40mm Length: Ideal for use with 10mm and 12mm spacers.
• Black Zinc Coating: Offers enhanced corrosion resistance and a sleek appearance.
• Set of 10: Provides enough bolts for a complete wheel installation.

Enhance wheel replacement efficiency on your BMW with a stud conversion kit, facilitating quicker and easier wheel changes. This comprehensive kit includes:

• Conical Seat Lug Nuts (20)
• 75mm Wheel Studs (20)

The installation of these studs provides a permanent wheel-hanging solution, saving time and reducing hassle during wheel changes. By simply screwing in the supplied studs, you'll be ready to go.

Benefits of using wheel studs instead of wheel bolts:

• Some racing regulations mandate wheel studs for enhanced wheel-to-hub contact, ensuring added safety.
• Wheel studs accommodate various spacer widths, eliminating the need for custom bolt lengths when using spacers.
• Simplifies wheel installation; the studs act as wheel hangers while nuts secure the wheel in place.
• Reduces wear on wheel hubs as wheel studs remain in the hub, unlike constantly removed and installed wheel bolts.
• Facilitates quick and easy tire changes as wheel studs stay in place.

Note: Use thread-locking compound during installation and torque studs to 15Nm for optimal performance.

Upgrade your BMW's wheel system with this stud conversion kit for improved convenience and functionality.

Upgrade your BMW's wheel setup with the BMW Wheel Stud Conversion Kit - half Set. This comprehensive kit allows you to convert your wheel bolts to wheel studs, offering enhanced convenience and security. With easy installation and durable construction, this kit is a must-have for any BMW enthusiast.

• Converts wheel bolts to wheel studs for improved convenience
• Provides enhanced security for your wheels
• Easy installation process
• Durable construction ensures long-lasting performance

Wheel Stud Conversion Kit - Half Set: Upgrade Your BMW's Performance

• Allows for easier and quicker wheel changes
• Provides a more secure and reliable wheel mounting solution
• Reduces the risk of stripped lug bolts
• Compatible with various BMW models

Enhance your BMW's performance with the Wheel Stud Conversion Kit - Half Set. This kit facilitates easier and quicker wheel changes while offering a more secure and reliable wheel mounting solution compared to traditional lug bolts. By reducing the risk of stripped lug bolts, it ensures a safer driving experience for BMW owners. Plus, it is compatible with various BMW models, ensuring versatility and ease of installation. Access Secret Premium Dashboard

Wheel Stud Conversion Kit - Full Set: Enhance Your BMW's Performance

• Facilitates quick and easy wheel changes
• Offers a secure and reliable wheel mounting solution
• Minimizes the risk of lug bolt stripping
• Compatible with various BMW models

Upgrade your BMW's performance with the Wheel Stud Conversion Kit - Full Set. This comprehensive kit is designed to facilitate quick and easy wheel changes, offering a secure and reliable wheel mounting solution. By minimizing the risk of lug bolt stripping, it ensures a safer driving experience. Plus, it is compatible with various BMW models, providing versatility and ease of installation. Access Secret Premium Dashboard

Drastically improve the looks of your vehicle while improving your vehicle's handling characteristics and/or easily adjust your wheel fitment to allow for the proper clearance when installing parts such as new wheels, big brake kits, or lowering suspension components.Interference from components such as shocks, springs, or control arms are a common issue when installing wheel that are not a direct OE size replacement. By moving your wheels a few millimeters each, you can give yourself enough clearance for proper wheel fitment and give your car a wider stance in the process.

ECS Tuning wheel spacers are constructed of high quality 6061-T6 aircraft grade aluminum and are specifically designed by in-house engineers and cnc machined to exact standards, ensuring the best fitment possible. By carefully measuring the OEM wheel hubs and bore dimensions, these spacers mount with minimal clearance to prevent any vibration, retaining the stock-like vibration free operation. 

This kit includes wheel bolts that are lab tested to meet or exceed ISO 898 class 10.9 mechanical and physical properties to ensure perfect fastening of the wheel to the hub with no issues or potential to snap under aggressive driving conditions.

ECS Tuning is a performance and genuine parts provider that designs their ECS Tuning branded aftermarket automotive parts in-house to ensure the highest quality and affordability possible. Every part's design is subjected to a rigorous test fit and stress test period to guarantee proper fitment and continued reliability for years to come.

This item fits the following BMWs:
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i
Front Only
2007-2013 E70 BMW X5M
2007-2014 E71 BMW X6 xDrive35i X6 xDrive50i X6M

Experience the ECS Tuning Wheel Spacer Fitment Kit Rent & Return Program

Explore the ECS Tuning Wheel Spacer Fitment Kit Rent & Return program, designed for Euro vehicles, offering the flexibility to experiment with wheel spacers hassle-free. Test fit various thickness spacers and bolt patterns to optimize your wheel fitment without commitment.

• Easy FedEx return with included shipping label (available for contiguous US customers)
• Receive a $110.00 account credit upon returning the complete fitment kit
• Contains 5 different thickness spacers for test fitting
• Accommodates 5 different bolt patterns: 4X100, 5X100, 5X112, 5X120, 5X130mm
• Each kit includes various nuts and studs for compatibility with different applications
• Designed for test fitting purposes only; cannot be used for driving

*$110.00 account credit will be applied on receipt of complete, serviceable Wheel Spacer Fitment Kit. Partial credit may be issued in the event of an incomplete kit.

**Vehicles with pre-installed wheel studs or stud conversions will need studs removed before test-fit as the spacers do not have all lug holes available**

Drastically improve the looks of your vehicle while improving your vehicle's handling characteristics and/or easily adjust your wheel fitment to allow for the proper clearance when installing parts such as new wheels, big brake kits, or lowering suspension components.Interference from components such as shocks, springs, or control arms are a common issue when installing wheel that are not a direct OE size replacement. By moving your wheels a few millimeters each, you can give yourself enough clearance for proper wheel fitment and give your car a wider stance in the process.

ECS Tuning wheel spacers are constructed of high quality 6061-T6 aircraft grade aluminum and are specifically designed by in-house engineers and cnc machined to exact standards, ensuring the best fitment possible. By carefully measuring the OEM wheel hubs and bore dimensions, these spacers mount with minimal clearance to prevent any vibration, retaining the stock-like vibration free operation. 

This kit includes wheel bolts that are lab tested to meet or exceed ISO 898 class 10.9 mechanical and physical properties to ensure perfect fastening of the wheel to the hub with no issues or potential to snap under aggressive driving conditions.

ECS Tuning is a performance and genuine parts provider that designs their ECS Tuning branded aftermarket automotive parts in-house to ensure the highest quality and affordability possible. Every part's design is subjected to a rigorous test fit and stress test period to guarantee proper fitment and continued reliability for years to come.

This item fits the following BMWs:
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i
Front Only
2007-2013 E70 BMW X5M
2007-2014 E71 BMW X6 xDrive35i X6 xDrive50i X6M

Unsure of what size spacer will work best for you? This professional kit includes 1mm, 2.5mm, 5mm, 10mm, and 15mm spacers with wheel studs and nuts for you play with. These are not the same spacers that we sell and they cannot be used to drive on. But with the studs installed the car can be lowered to the ground and rolled to check for clearances. These test fit spacers are drilled to fit the standard BMW 5x120 bolt pattern as well as 4-lug 4x100 (and VW/Audi bolt patterns too). You can stack spacers to achieve the perfect clearance. When you're ready call us to order the spacers you need (Turner spacers come in 3mm, 5mm, 7.5mm, 10mm, 12.5mm, 15mm, 17.5mm, 20mm, 25mm, and 30mm spacer thicknesses).

These spacers are not for driving on. They lack the hubcentric lip that BMW wheels are designed to work with. Driving on studs alone will lead to a failure.

Two ways to buy -

• Own. Just as it says, you buy this kit to own. Perfect for shops or race teams that change wheels or brake components often. For shops you can measure wheel clearance and order the correct spacers the first time around (no wasting inventory or paying return shipping). Note: Kits purchased to Own are not returnable for refunds.
• Rent. Pay the full price but get $110 as a store credit when you return the kit. We keep a modest $19.95 fee for the service. Perfect for DIY and enthusiasts who only need the Test Kit once. Use your store credit to purchase your spacers (or anything else from our catalog).

Wheel Spacer FAQ:
How to measure for wheel spacers
Wheel spacer encyclopedia

Drastically improve the looks of your vehicle while improving your vehicle's handling characteristics and/or easily adjust your wheel fitment to allow for the proper clearance when installing parts such as new wheels, big brake kits, or lowering suspension components.Interference from components such as shocks, springs, or control arms are a common issue when installing wheel that are not a direct OE size replacement. By moving your wheels a few millimeters each, you can give yourself enough clearance for proper wheel fitment and give your car a wider stance in the process.

ECS Tuning wheel spacers are constructed of high quality 6061-T6 aircraft grade aluminum and are specifically designed by in-house engineers and cnc machined to exact standards, ensuring the best fitment possible. By carefully measuring the OEM wheel hubs and bore dimensions, these spacers mount with minimal clearance to prevent any vibration, retaining the stock-like vibration free operation. 

ECS Tuning is a performance and genuine parts provider that designs their ECS Tuning branded aftermarket automotive parts in-house to ensure the highest quality and affordability possible. Every part's design is subjected to a rigorous test fit and stress test period to guarantee proper fitment and continued reliability for years to come.

This item fits the following BMWs:
1997-2003 E39 BMW 525i 528i 530i 540i M5
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i
​Front Only
2007-2013 E70 BMW X5M
2007-2014 E71 BMW X6 xDrive35i X6 xDrive50i X6M

Enhance Your BMW's Performance with Titanium Conical Seat Wheel Bolt - 14x1.25x35mm - Set Of 20

• Lightweight titanium construction reduces unsprung weight
• Corrosion-resistant for long-lasting durability
• Conical seat design ensures optimal wheel fitment
• Set of 20 bolts for complete wheel installation

Elevate your BMW's performance with the Titanium Conical Seat Wheel Bolt - 14x1.25x35mm - Set Of 20. Crafted from lightweight titanium, these bolts reduce unsprung weight, enhancing agility and responsiveness. Their corrosion-resistant properties ensure long-lasting durability, even in harsh driving conditions. The conical seat design provides optimal wheel fitment, promoting safety and stability. With a set of 20 bolts included, this kit is perfect for complete wheel installation. Access Secret Premium Dashboard

Details matter.

That's why we've added Dinan Valve Stem Caps to the ever-expanding product lineup! Sold as a set of 4 aluminum caps, each has a Dinan "egg" logo engraved on the face to accentuate even the smallest of details in your high-performance build.

Features:

Nuanced design for universal visual appeal

Dinan "egg" logo on top

Black finish

Aluminum construction