Clutch Discs

Clutch Discs for Accurate Fitment and Stable Engagement

Category focus: this range covers clutch friction discs and compact disc packs, meaning the parts that directly influence torque transfer, release behaviour and shift feel. The current assortment includes 184 mm / 7.25", 228 mm / 8.98" and 240 mm / 9.25-9.45" sizes, with spline patterns such as 23x29-10N, 28x35-10N, 32.5x35-26N, 23x25-24N and 21.8x24.2-23N across BMW, Nissan, Subaru and VAG applications.

Technical background and system integration

Key interface: a clutch disc works between the flywheel and the pressure plate, so the outer diameter is only one part of the picture. Spline size, tooth count, hub design, disc construction and full clutch-family compatibility all matter when you want consistent engagement and release.

• Diameter: the category currently mixes 184 mm motorsport disc packs with 228 mm and 240 mm single-disc options.
• Spline pattern: BMW listings include 23x29-10N, 28x35-10N and 32.5x35-26N options, Nissan uses 23x25-24N, while one VAG entry is listed with 21.8x24.2-23N.
• Friction type: the current range includes sintered and cerametallic-style motorsport solutions as well as Sachs part-numbered discs.
• Use case: compact 7.25" packs are typically associated with motorsport-style assemblies, while 228/240 mm discs often suit street-performance, swap or conversion projects.

System thinking: the right disc is never an isolated choice; it must match the flywheel, pressure plate, gearbox input shaft and release hardware as one working assembly. That is why the correct option can differ even within the same engine family.

How to choose the right one

Quick selection guide: because this is a product-list page, start with vehicle platform and brand, then confirm disc diameter, spline size, tooth count and whether the listing is a single disc or a disc pack. On BMW builds in particular, check whether the part belongs to M50/M52/M54, M57 or N54/B58-related setups before deciding.

In this category, the product card data on spline, diameter and application is more reliable for selection than the photo alone.

• BMW: confirm whether you need 23x29-10N, 28x35-10N or 32.5x35-26N, and make sure the gearbox family matches.
• Nissan: for 350Z and 370Z items, the listed range shows 23x25-24N spline with 240 mm sizing, but the full clutch pairing still needs to be checked.
• VAG/Subaru: OE references and product-card application notes are especially useful here because similar diameters can still hide a different hub or pressure-plate match.

Installation and failure-prevention tips

Before assembly: make sure the disc slides correctly on the gearbox input shaft, the friction surfaces are clean and dry, the fastening threads are in good condition and the pressure plate and flywheel belong to the same system. A trial build with an alignment tool helps prevent rework before final tightening.

Common failure point: the most frequent problem is not the disc itself but the wrong spline, wrong diameter or a disc being paired with a different pressure-plate family. When that happens, the gearbox may not seat fully, the clutch may not release cleanly, and you can get chatter or unwanted noise on take-up; prevent it by verifying disc size, hub format and full clutch-system compatibility before final assembly.

• Trial fit: before fitting the gearbox, check that the disc is not installed the wrong way round and that the hub does not interfere with neighbouring parts during release.
• Recheck: after the first use, monitor engagement point, vibration, unusual noise and whether gear selection stays consistent when cold and warm.

PRO TIP: if you are deciding between a 7.25" motorsport disc pack and a 228/240 mm single-disc layout, identify the flywheel and pressure-plate family first and choose the disc second.

FAQ

Which specification matters most when choosing a clutch disc?
Diameter, spline size and tooth count usually form the starting point. Those always need to be checked together with the pressure plate and gearbox input shaft rather than as separate numbers.

What is the most common failure or installation mistake?
Check the sequence in this order: disc diameter, spline size, tooth count, pressure-plate family, flywheel layout, then gearbox type. If any of those details is only assumed, verify it against both the product card and the removed parts before final assembly.

What is the difference between a 184 mm / 7.25" disc pack and a 240 mm single-disc setup?
A 7.25" arrangement usually belongs to a compact motorsport-style clutch family and therefore connects to different hardware. A 240 mm single-disc setup often suits street-performance or swap-oriented builds, but the full assembly still decides the real fitment.

What should I check if the gearbox is hard to shift or the clutch does not release cleanly after assembly?
Start with disc orientation, spline fit and whether the disc was meant for that exact pressure plate. Then inspect release travel and centring, because even a small mismatch can alter disengagement behaviour.

Can I replace only the disc, or should I treat it as a full clutch-system decision?
That depends on the condition and compatibility of the existing hardware. If the flywheel, pressure plate and release side are known to be correct, disc-only replacement may be reasonable, but mixing different clutch families should always be checked carefully first.