
The facts.
| Brand | STM |
|---|---|
| Part number | FDU-S050 |
| Type | Slipper clutch (anti-hopping clutch) |
| Fitment | Ducati Panigale 1299 / 1299 S (2015-2018) |
| Slipper mechanism | Patented ball-ramp system |
| Spring type | Diaphragm spring |
| Weight saving | Approx. 0.7-0.8 kg (rotating mass reduction) |
| Intended use | Track and sport road riding |
DescriptionThe whole story▼
When every tenth of a second counts on track, the STM slipper clutch for the Ducati Panigale 1299/S (2015-2018) delivers the kind of precision control that separates confident, aggressive riding from white-knuckle braking. Engineered specifically for the 1299 platform, this clutch eliminates rear-wheel hop under hard downshifts, minimises highside risk at high speeds, and shaves approximately 0.7-0.8 kg of rotating mass from the drivetrain — all in a direct OEM-replacement package carrying part number FDU-S050.
Key Features
- Prevents engine over-revving on downshifts, keeping the rear tyre planted and the chassis stable through corner entry
- Reduces rear-wheel hop for measurably improved traction and stability under hard braking
- Minimises the trigger impulse of a highside, significantly lowering risk at racing speeds
- Allows controlled rear-wheel slide for confident, sport-oriented cornering
- Improved clutch closing-phase control in corners prevents unwanted tucking of the front end
- Patented ball-ramp technology governs the slipper function with precision at high engine speeds
- Diaphragm spring eliminates pressure-plate wobble, delivering a cleaner, more progressive lever feel
- Weight saving of approximately 0.7-0.8 kg through reduction of rotating mass improves throttle response and overall performance
Engineering Behind the STM Slipper Clutch
STM's patented ball-ramp mechanism is the heart of the FDU-S050. Under normal acceleration the ramps lock the clutch basket solidly, transmitting full engine torque to the rear wheel without slip or power loss. The moment the engine begins to over-run on a downshift — a scenario that sends stock clutches into a chattering, wheel-hopping frenzy — the ramps disengage proportionally, allowing the clutch to slip just enough to smooth out the drivetrain spike. The result is a rear tyre that stays in contact with the track surface instead of skipping off it.
The integrated diaphragm spring prevents the pressure plate from teetering under high-rpm conditions, translating directly into a clutch lever pull that feels linear and predictable rather than vague or snatchy. Riders stepping from a standard wet clutch to the STM unit consistently report that the feedback through the lever alone justifies the upgrade.
Performance on Track and Road
On the circuit, the FDU-S050 transforms the Panigale 1299's corner-entry behaviour. Carrying more speed deeper into braking zones becomes viable because the chassis remains settled; highside moments that previously lurked at the edge of the envelope are substantially defused. The weight reduction of approximately 0.7-0.8 kg from rotating mass is not a marketing abstraction — lower rotational inertia means the engine revs more freely, responds faster to throttle inputs, and returns to idle more crisply between gear changes. For riders chasing lap times or simply wanting a more connected, less stressful experience in sport riding, the cumulative effect is real and immediately noticeable.
Fitment and Compatibility
This slipper clutch is engineered as a direct replacement for the following models:
- Ducati Panigale 1299 (2015-2018)
- Ducati Panigale 1299 S (2015-2018)
Specifications
| Specification | Detail |
|---|---|
| Brand | STM |
| Part number | FDU-S050 |
| Type | Slipper clutch (anti-hopping clutch) |
| Fitment | Ducati Panigale 1299 / 1299 S (2015-2018) |
| Slipper mechanism | Patented ball-ramp system |
| Spring type | Diaphragm spring |
| Weight saving | Approx. 0.7-0.8 kg (rotating mass reduction) |
| Intended use | Track and sport road riding |
FitmentWhich bikes this fits▼
- Ducati Panigale 1299/S (2015–2018)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.