MMX BMW Individual Tapered Seat Wheel Bolt M14 x 1.25 (38mm & 41mm)

The MMX Individual Tapered Seat Wheel Bolt is a single M14 x 1.25 bolt with a 60° tapered seat, available in 38mm and 41mm shank lengths. It is sold individually, which makes it the straightforward answer to a lost bolt, a stripped thread, or a spacer installation that needs one or two extra fixings to make up a set. Choosing The Right Length Bolt length is dictated by wheel and spacer thickness rather than by model. As a rule of thumb, a bolt should engage the hub by at least the diameter of its own thread. The 38mm bolt suits most aftermarket wheels fitted without a spacer, while the 41mm length covers thicker wheel faces and thin spacers. Where a thicker spacer is fitted, MMX supplies longer bolts within its spacer kits. Correct Seat Profile Matters A tapered, or conical, seat bolt must be matched to a wheel with a tapered bolt seat. Fitting a tapered bolt into a ball seat wheel, or the reverse, leaves the wheel located on a fraction of its intended contact area and can allow it to work loose. The seat profile of the existing bolts should always be checked before ordering. Key Features M14 x 1.25 thread – the common BMW fitment 60° tapered (conical) seat Choice of 38mm or 41mm shank length Sold individually as a spare or to complete a set Correctly torqued to 120Nm on installation Specifications Part Numbers: MMR37-1500-38MM (38mm), MMR37-1500-41MM (41mm) Thread: M14 x 1.25 Seat: Tapered / conical Sold As: Single bolt Compatibility BMW models using M14 x 1.25 tapered seat wheel bolts Suitable as a replacement or supplementary bolt for MMX wheel spacer kits Frequently Asked Questions How many bolts are needed per wheel? Five on the majority of BMW applications. This listing is for a single bolt, so a full wheel needs five and a full car twenty. Is this a ball seat bolt? No. This is a tapered, 60 degree conical seat bolt. The seat profile of the wheel must match. Why Buy Individual Bolts? Losing one bolt should not mean buying twenty. MMX supplies these individually so a set can be topped up or repaired exactly as needed. R44 Performance stocks the full MMX wheel fixing range including spacers, stud conversions and locking nuts.