Kit containing 20 M14x1.25 80 mm studs and 20 MMR spherical nuts - BMW & MINI

The kit, consisting of 20 M14x1.25 80-mm studs and 20 MMR spherical nuts, is an ideal upgrade for BMW and MINI owners looking to replace the original wheel bolts with a more practical, reliable mounting system that’s perfectly suited for sporty driving. This conversion makes wheel replacement easier while giving the car a more racing-inspired look.
The kit includes 20 high-resistance steel studs with M14x1.25 threads and 20 spherical nuts, enough to equip an entire vehicle. Unlike the original bolts, the studs remain attached to the hub, making it easier to position the front wheel before starting the tightening process for the nuts. This makes wheel replacements faster, more precise, and safer—especially during tire changes, mechanical work, or track days.
Made of high-strength steel, MMR studs feature a black finish that offers excellent corrosion resistance while providing a premium look perfectly in line with the performance ethos of MMX Performance.
With a length of 80 mm, these studs are particularly recommended for vehicles equipped with 10- to 20-mm wheel spacers. They ensure optimal thread engagement while maintaining a secure and reliable mounting, even on the highest-performance vehicles.
The 20 spherical nuts included are designed for rims with a spherical mounting surface—a configuration found on many original BMW and MINI rims. They ensure precise wheel centering and even tightening for road, sports, or track use.
The mounting is fully reversible and requires no permanent modifications to the vehicle.

Technical Specifications

• Manufacturer Part Number: MMR37-1501-80B
• Contents: 20 studs + 20 spherical nuts
• Type: Wheel stud conversion kit
• Thread: M14 x 1.25
• Stud length: 80 mm
• Range type: Spherical
• Material: High-resistance steel
• Finish: Black
• Recommended use: Vehicles equipped with 10- to 20-mm wheel spacers
• Fully reversible mounting

Key Features

• Complete kit including 20 M14x1.25 studs (80 mm) and 20 spherical nuts.
• Makes it easy to perform the mounting and removal of wheels.
• Ideal for vehicles equipped with track spacers.
• More robust mounting than the original wheel bolts.
• High-resistance steel suitable for heavy-duty use.
• Corrosion-resistant finish with resistance to corrosion.
• Compatible with spherical-flange rims.
• Suitable for sporty road driving, track days, and racing.
• Simple installation and fully reversible.

Mounting Recommendations

Remove the wheels, then thoroughly clean the hub threads and those of the new studs using a brake cleaner or suitable solvent to remove all traces of grease or debris.
Before installation, verify that the smooth end of the stud crosses the brake disc freely without hitting any obstructions.
Apply a thin layer of high-temperature threadlocker (such as Loctite 2422 or equivalent) to the threads on the hub side.
Using a 6 mm Allen wrench, screw each stud into the hub until it is fully seated, then perform tightening to 40 Nm. Do not exceed this value for tightening.
Allow the threadlocker to vulcanize for about 3 hours before reinstalling the wheels.
Next, install the wheels using the 20 spherical nuts provided and perform the tightening process to the torque specified by the vehicle manufacturer. After driving the first few kilometers, it is recommended that you check the torque again.