{"product_id":"ohlins-fkr-cartridge-kit-racing-ttx-25-fkr-121-aprilia-rsv4-1100","title":"Öhlins FKR Cartridge Kit Racing TTX 25 FKR 121 – Aprilia RSV4 1100 Factory (2020–2026)","description":"\u003cp\u003eEngineered exclusively for the Aprilia RSV4 1100 Factory (2020–2026), the Öhlins FKR Cartridge Kit Racing TTX 25 FKR 121 transforms the factory fork into a precision racing tool. Its spring-pressurised closed system eliminates the pressure loss risk associated with conventional gas-pressure units, delivering consistent, repeatable damping lap after lap so you can focus entirely on riding.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpring-pressurised closed system removes the need for external gas charging, cutting maintenance time and preventing damping inconsistencies over a long race day.\u003c\/li\u003e\n\u003cli\u003eAdvanced TTX technology with a newly developed piston and 8 mm piston rod reduces internal friction, producing rapid response and a linear damping curve that rewards precise set-up work.\u003c\/li\u003e\n\u003cli\u003eThree springs included (04744-series, rates 9.0, 9.5 and 10.0 N\/mm) so you can dial in the correct spring rate for your weight and riding style straight out of the box.\u003c\/li\u003e\n\u003cli\u003e120 mm stroke matches the geometry demands of the RSV4 1100 Factory chassis, preserving correct ride height and steering geometry.\u003c\/li\u003e\n\u003cli\u003eDirect fitment for forks equipped with the Öhlins FL 963 cartridge — no adapters or machining required.\u003c\/li\u003e\n\u003cli\u003eInstallation manual included; Öhlins recommends fitting by an authorised Öhlins Service Centre for best results.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTTX Technology on Track\u003c\/h2\u003e\u003cp\u003eThe TTX (Twin Tube X) cartridge design keeps oil and gas separated throughout the stroke, meaning the damping characteristics stay stable whether you are pushing through a long, fast corner or hammering repeated braking zones. The lower internal pressure enabled by the 8 mm piston rod shortens the hydraulic response time, so the fork reacts to surface changes almost instantaneously rather than playing catch-up. The result is improved traction on exit and noticeably better front-end feel — the kind of feedback that builds confidence and trims lap times.\u003c\/p\u003e\u003ch2\u003eBuilt for the Racetrack, Not the Road\u003c\/h2\u003e\u003cp\u003eThe FKR 121 is a motorsport product homologated for closed-circuit competition only. It is not approved for road use. If you race your RSV4 1100 Factory at club level, trackday events or in series such as the Aprilia Racing Days, this kit provides a structured upgrade path from the standard fork internals without requiring a full fork replacement. The spring-pressurised circuit also simplifies trackside maintenance — no nitrogen bottle needed between sessions.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eThis cartridge kit is designed specifically for the following model:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAprilia RSV4 1100 Factory — model years 2020, 2021, 2022, 2023, 2024, 2025, 2026\u003c\/li\u003e\n\u003cli\u003eCompatible with forks fitted with the Öhlins FL 963 cartridge only. Verify your fork specification before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003eFKR 121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTechnology\u003c\/th\u003e\n\u003ctd\u003eTTX 25 (Twin Tube X, spring-pressurised closed system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003ctd\u003e120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Series\u003c\/th\u003e\n\u003ctd\u003e04744-series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Spring Rates\u003c\/th\u003e\n\u003ctd\u003e9.0, 9.5, 10.0 N\/mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePiston Rod Diameter\u003c\/th\u003e\n\u003ctd\u003e8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003ctd\u003eAprilia RSV4 1100 Factory (2020–2026), Öhlins FL 963 fork\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIntended Use\u003c\/th\u003e\n\u003ctd\u003eMotorsport \/ closed-circuit racing only — not road legal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Öhlins","offers":[{"title":"Default Title","offer_id":53168754163978,"sku":"FKR 121","price":2304.0,"currency_code":"BSD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/FKR_125_20f27137-a1cb-456f-a768-df45b278fc49.png?v=1780813590","url":"https:\/\/inter-pace.com\/en-bs\/products\/ohlins-fkr-cartridge-kit-racing-ttx-25-fkr-121-aprilia-rsv4-1100","provider":"Inter-Pace","version":"1.0","type":"link"}