
The facts.
| Brand | Öhlins |
|---|---|
| Part number | AP 660 |
| Model | STX 46 Supersport |
| Position | Rear |
| Length | 309 +0.5/−5.5 mm |
| Stroke | 51 mm |
| Piston diameter | 46 mm |
| Spring rate | 160 N/mm |
| Spring part number | 01093-64 |
| Homologation | ABE (Germany) |
DescriptionThe whole story▼
Engineered to meet the rigorous demands of German type approval (ABE), the Öhlins STX 46 Supersport shock absorber AP 660 is a direct-fit, road-legal upgrade purpose-built for the Aprilia RS 660 (2020–2026). It transforms the RS 660's rear suspension from competent to exceptional — delivering the kind of precision and composure that ambitious street riders and occasional track day enthusiasts genuinely notice from the first corner.
Key Features
- German ABE certification ensures full road legality — no paperwork complications, no re-registration headaches for riders in Germany.
- Gas-pressure damper with a fixed external reservoir maintains consistent damping performance across sustained, demanding riding — no fade, no guesswork.
- Fully adjustable rebound and compression damping lets you dial the chassis to your weight, riding style and road conditions without specialist tools.
- Adjustable length (309 +0.5/−5.5 mm) fine-tunes ride height and geometry, sharpening steering response or adding stability at will.
- 46 mm piston diameter maximises oil flow and damping resolution, translating into a more linear, predictable rear end.
- Spring rate of 160 N/mm pairs precisely with the RS 660 platform, providing confident support without the harshness of a generic aftermarket unit.
Suspension Performance
The STX 46 Supersport range sits at the heart of Öhlins' road-biased performance lineup. The fixed external reservoir keeps oil and gas separated under sustained load — critical when a twisty mountain pass or a spirited back-road session generates the kind of heat that overwhelms a standard monotube unit. The result is a damping curve that remains accurate and consistent whether you are threading traffic on a cold Tuesday morning or pushing harder on a warm track day afternoon.
Setup Flexibility
Both rebound and compression damping are independently adjustable, giving you genuine freedom to tailor the shock to your preference without compromising one axis for another. The adjustable length feature is particularly valuable on the RS 660: a small change in ride height measurably alters steering geometry, allowing you to dial in the front-end feel that suits your riding without touching the forks. Spring part number 01093-64 is listed for reference should a rate change ever be required.
Installation
A fitting guide is included in the box. Öhlins recommends installation by an authorised Öhlins Service Centre for optimum setup and to preserve the warranty. The shock ships as a single unit (AP 660) ready to replace the standard rear damper on the Aprilia RS 660.
Fitment & Compatibility
- Aprilia RS 660 — model years 2020, 2021, 2022, 2023, 2024, 2025, 2026
- Includes German ABE (Allgemeine Betriebserlaubnis) type approval
Fitting and Setup Service
Fitting matters as much as the part. We are an authorised Öhlins service centre and carry out installation, servicing and setup ourselves — get in touch and we will arrange it alongside your order.
Specifications
| Specification | Detail |
|---|---|
| Brand | Öhlins |
| Part number | AP 660 |
| Type | STX 46 Supersport shock absorber |
| Position | Rear |
| Length | 309 +0.5/−5.5 mm (adjustable) |
| Stroke | 51 mm |
| Piston diameter | 46 mm |
| Spring rate | 160 N/mm |
| Spring part number | 01093-64 |
| Damping adjustment | Rebound and compression, independently adjustable |
| Reservoir | Fixed external gas-pressure reservoir |
| Homologation | ABE (Germany) |
| Fitment | Aprilia RS 660 (2020–2026) |
| Supplied as | Single unit |
What's includedEverything in the box▼
- 1x Öhlins STX 46 Supersport shock absorber AP 660
- 1x fitting guide
FitmentWhich bikes this fits▼
- Aprilia RS 660 (2020–2026)
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.