K-Tech TRDS-R Shock Absorber Aprilia RS 660 (2020-2026) 261-020-010-010

Built for riders and teams who refuse to compromise on lap times, the K-Tech TRDS-R shock absorber for the Aprilia RS 660 (2020–2026) brings championship-proven Through-Rod damping technology to a compact, reservoir-free package. Homologated for use in the British Superbike Championship and at the Isle of Man TT, this is genuine race-grade suspension engineering made accessible to competitors working within current championship cost regulations.

Key Features

• Through-Rod Damping System (TRDS) delivers precise, fully adjustable compression and rebound tuning — giving riders and technicians real data on chassis behaviour at every corner entry and exit.
• The 'R' stands for Regulation: engineered specifically for cost-restricted championships and relaxed racing regulations, so you extract maximum performance without breaching series rules.
• Reservoir-free compact design with a revised internal architecture makes this one of the lightest race shocks in its class, reducing unsprung mass on the RS 660's swingarm.
• Superior heat dissipation prevents fade-induced damping drift mid-race, keeping suspension character consistent across a full stint regardless of track temperature or session length.
• Potentiometer mounting points allow direct integration of a ride-height or stroke sensor for data-logging systems — invaluable for track analysis.
• RCU body diameter of 45 mm and through-rod diameter of 14 mm provide exceptional stiffness-to-weight ratio within the RS 660's linkage envelope.

TRDS Technology & Race Pedigree

K-Tech's Through-Rod technology replaces the conventional hollow damper rod with a solid rod that passes through the full length of the shock body. This arrangement creates a single oil chamber free of the pressure imbalance that affects traditional twin-tube and mono-tube designs, enabling finer, more repeatable click adjustments. The result is a shock that responds predictably to each click of compression or rebound, allowing a methodical setup approach — essential when track time is limited.

The TRDS-R has been campaigned at the highest levels of British club and national racing as well as the Isle of Man TT, where consistent damping under sustained high-speed loads is non-negotiable. The 18-click compression and 18-click rebound ranges, combined with 5 mm preload adjustment as a starting baseline, give teams a wide tuning window on both fast and technical circuits.

Fitment & Compatibility

This shock absorber is a direct-fit replacement for the Aprilia RS 660 covering all model years from 2020 through to 2026. No modification to the swingarm linkage or subframe is required. Installation by an authorised K-Tech Service Centre is recommended to ensure correct preload setting, oil fill and bleed procedure.

Specifications

• Spring series: 5959-150
• Eye-to-eye length: 312 mm
• Stroke: 54 mm
• Compression adjustment: 18 clicks (suggested baseline)
• Rebound adjustment: 18 clicks (suggested baseline)
• Preload: 5 mm (suggested baseline)
• RCU body diameter: 45 mm
• Through-rod diameter: 14 mm
• Potentiometer mounting points: yes
• External reservoir: none
• Part number: 261-020-010-010