MMX Wheel Bolt-to-Stud Conversion Kit, 70mm Extended Studs with Ball-Seat Wheel Nuts, BMW & MINI M14x1.25

Wheel stud conversion for BMW and MINI with 70 mm ball-seat nuts, M14 x 1.25

Tired of juggling heavy alloys and fiddly factory wheel bolts during tyre changes and track prep? Upgrade to a wheel stud conversion and make every wheel swap faster, safer and more precise. This extended stud and matching ball-seat nut setup replaces standard bolts to deliver a stronger, more secure fixing that enthusiasts and track-day drivers trust.

Designed for hubs that use M14 x 1.25 thread pitch, this 70 mm extended solution gives you the confidence and convenience you want when rotating wheels in the garage, in the paddock or at the roadside. Slide the wheel straight onto the studs, spin on the spherical-seat nuts and you are done. No more fighting to line up bolt holes, no more risking cross-threading, no more scuffed calipers.

• Quicker wheel changes for track days, pit stops and regular maintenance
• Stronger and more secure than OE wheel bolts for repeated on-off cycles
• Extended 70 mm length for easier alignment and room for spacers where applicable
• Ball-seat, spherical-profile nuts for correct OE-style seating on BMW and MINI wheels
• Helps prevent cross-threading and protects brake calipers from knocks during refits
• Consistent torque and repeatable wheel fitment for road, fast-road and motorsport use

What you get

Complete wheel hardware conversion: extended wheel studs and matching ball-seat wheel nuts to suit M14 x 1.25 applications.

Fitment and key specs

• Thread pitch: M14 x 1.25
• Stud length: 70 mm
• Seat type: ball seat, spherical profile
• Vehicle compatibility: BMW and MINI models that use M14 x 1.25 hub threads and ball-seat wheels. Please confirm your vehicle’s thread pitch and seat style before ordering.

Installation

Professional fitting available at MJ Modifications in Warwickshire. For a tailored installation quote, email info@mjmodifications.co.uk.

Tried, tested and loved by our customers

We run this conversion on our own cars and customer builds. Feedback is consistent: easier wheel swaps, sturdier fastening and less hassle in the pits and on the driveway.

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