PMC Motorsport Lightweight aluminium (rigid / stiff /  / single-mass) custom flywheel for BMW N55 N55B30 135i 335i 535i (6-mounting bolts) - 6,87 kg / 15,15lb

PMC Clutch – precise solutions for mechanical tuning and motorsport. Lightweight aluminium rigid flywheel with replaceable friction surface for BMW N55 N55B30 135i 335i 535i (6-mounting bolts) engines.

The lower inertia of a lightweight flywheel results in significantly better and faster throttle response, improving the car's acceleration. Although it does not increase engine power, it reduces losses in the drivetrain, which translates to slightly higher power at the wheels. Lightweight flywheels perform exceptionally well on twisty tracks, as the car regains speed lost in corners much faster.

Applications:

• Drift / Time Attack: Where precise control over engine RPM and rapid reduction of unsprung mass are crucial.
• Street Tuning: For enthusiasts looking to eliminate the failure-prone dual-mass flywheel and experience a sportier vehicle character.
• Motorsport: Wherever every second and every kilogram of weight reduction matters for the final result.

Advantages of a lightweight flywheel:

• Instant throttle response: Reducing rotating mass allows the engine to rev up much faster, improving dynamics during gear changes and overtaking.
• Increased durability in sports: Made from the highest quality aerospace aluminium alloy, the wheel is resistant to extreme temperatures and loads that could damage a factory dual-mass flywheel.
• Serviceability (Replaceable disc): Thanks to the replaceable steel friction surface, this wheel is a long-term solution – when worn, you only replace the friction plate, not the entire element.
• Ease of installation (Bolt-on): Designed for factory mounting points, ensuring full compatibility with the stock pressure plate and starter without modifications. 

>Weight

When designing our flywheels, we pay great attention to their weight – PMC flywheels are created for both tuning enthusiasts and motorsport builders, which is why selecting the right mass is so important. 

Inertia vs. Acceleration

A flywheel stores kinetic energy. The heavier it is, the more energy is required to set it in motion.

• Too light: The engine revs up instantly, which is desirable in sports, but drops just as quickly. This can make smooth gear changes difficult in daily driving.
• Correctly balanced: Allows for faster throttle response while retaining enough energy for the engine to operate properly after letting off the accelerator pedal.

Idle Stability

A lightweight flywheel has a lower capacity to dampen engine irregularities (especially in 3- or 4-cylinder units).

• If the weight is too low, the engine may idle roughly, jerk, or even stall during sudden declutching (e.g., when approaching traffic lights).
• Appropriate mass provides an "inertia buffer" that maintains crankshaft rotation between the power strokes of individual pistons.

Ease of Starting (Torque)

A heavy wheel helps "set the mass" of the entire vehicle in motion from a standstill.

• With an extremely light wheel, the driver must apply more throttle and operate the clutch more precisely to avoid stalling the engine when starting.
• The right choice of weight allows the car to maintain its civilized character, enabling smooth starts on hills or in traffic jams.

Specification

!! 48.08% Lighter than the OE flywheel !! Only 6,87kg / 15,15lb, which is approx. 6,36kg / 14,02lb less than the factory wheel

• Compatibility: PMC custom flywheels are designed to work with OE BMW clutch kits or their replacements fitting the OE flywheel.
• Clutch Disc: Designed for use with factory clutch discs compatible with your gearbox.
• Replaceable friction surface: The PMC flywheel friction surface ensures durability and long-term operation. In case of wear, it is easy to disassemble, and replacement parts are available in our offer.
• Original starter ring gear: Galvanized ring gear, with hardness identical to OE flywheels, ensuring reliability and full cooperation with the OE starter.
• Balanced before shipping: Every PMC flywheel is checked and precisely balanced before shipping. If you are using a used or custom clutch kit, we recommend rebalancing the entire set.

Please note that a lightweight flywheel provides uncompromising throttle response at the cost of eliminating factory damping elements. This translates into more direct drivetrain operation, which may result in a natural increase in the audibility of gearbox mechanisms. This is a desired characteristic in sports vehicles, resulting from the rigid connection of the engine to the drive. 

Why Choose PMC Motorsport Parts?

Professionalism. From design to implementation, our parts go through extensive processes. Each component is measured with a measuring arm and a 3D scanner. Prototypes are subjected to numerous tests to eliminate all potential issues. We use only certified materials from trusted suppliers, and our CNC machining facilities are staffed by experienced professionals.

Perfect Coaxiality. PMC Motorsport adapters guarantee perfect alignment between the engine and the transmission. 

Experience. Thousands of adapters produced and satisfied customers worldwide. PMC Motorsport adapters are used in both daily vehicles and professional motorsport projects.

Certified Quality. Quality is priority. Each part undergoes control at every production stage. Every component is engraved with a unique serial number. ISO PN-EN ISO 9001:2015 certified.  

Flywheel designed for:

• BMW 1 COUPE (E82) 135 306HP / 225KW [N54 B30 A, N55 B30 A] | 10/2007-10/2013
• BMW 1 COUPE (E82) 135 326HP / 240KW [N54 B30 A, N55 B30 A] | 10/2007-10/2013
• BMW 1 KABRIOLET (E88) 135 306HP / 225KW [N54 B30 A, N55 B30 A] | 03/2008-12/2013
• BMW 1 KABRIOLET (E88) 135 326HP / 240KW [N55 B30 A] | 03/2008-12/2013
• BMW 3 (E90) 335 306HP / 225KW [N54 B30 A, N55 B30 A] | 03/2006-12/2011
• BMW 3 (E90) 335 XDRIVE 306HP / 225KW [N54 B30 A, N55 B30 A] | 05/2008-10/2011
• BMW 3 (E90) 335 XI 306HP / 225KW [N54 B30 A, N55 B30 A] | 09/2006-06/2008
• BMW 3 (F30, F80) 335 306HP / 225KW [N55 B30 A] | 04/2011-07/2015
• BMW 3 (F30, F80) 335 340HP / 250KW [N55 B30 A] | 07/2013-
• BMW 3 (F30, F80) 335 XDRIVE 306HP / 225KW [N55 B30 A] | 05/2011-07/2015
• BMW 3 (F30, F80) 335 XDRIVE 326HP / 240KW [N55 B30 A] | 04/2011-07/2013
• BMW 3 (F30, F80) 335 XDRIVE 340HP / 250KW [N55 B30 A] | 07/2013-
• BMW 3 COUPE (E92) 335 306HP / 225KW [N54 B30 A, N55 B30 A] | 11/2005-06/2013
• BMW 3 COUPE (E92) 335 XDRIVE 306HP / 225KW [N54 B30 A, N55 B30 A] | 11/2008-12/2013
• BMW 3 COUPE (E92) 335 XI 306HP / 225KW [N54 B30 A, N55 B30 A] | 03/2007-02/2010
• BMW 3 GRAN TURISMO (F34) 335  306HP / 225KW [N55 B30 A] | 03/2013-
• BMW 3 KABRIOLET (E93) 335 306HP / 225KW [N54 B30 A, N54 B30 B, N55 B30 A] | 05/2006-10/2013
• BMW 3 TOURING (E91) 335 306HP / 225KW [N54 B30 A, N55 B30 A] | 03/2006-05/2012
• BMW 3 TOURING (E91) 335 XDRIVE 306HP / 225KW [N54 B30 A, N55 B30 A] | 05/2008-05/2012
• BMW 3 TOURING (E91) 335 XI 306HP / 225KW [N54 B30 A, N55 B30 A] | 09/2006-08/2008
• BMW 3 TOURING (F31) 335 306HP / 225KW [N55 B30 A] | 07/2012-06/2015
• BMW 3 TOURING (F31) 335 XDRIVE 306HP / 225KW [N55 B30 A] | 07/2012-06/2015
• BMW 4 COUPE (F32, F82) 435 306HP / 225KW [N55 B30 A] | 07/2013-
• BMW 4 COUPE (F32, F82) 435  340HP / 250KW [N55 B30 A] | 07/2013-
• BMW 4 COUPE (F32, F82) 435 XDRIVE 306HP / 225KW [N55 B30 A] | 07/2013-
• BMW 4 KABRIOLET (F33, F83) 435 306HP / 225KW [N55 B30 A] | 10/2013-
• BMW 5 (F10)  535 306HP / 225KW [N55 B30 A] | 01/2009-10/2016
• BMW 5 TOURING (F11) 535 306HP / 225KW [N55 B30 A] | 11/2009-

Specification

Clutch Set

ADDITIONAL INFORMATION