K-Tech TRDS-R Shock Absorber Yamaha YZF-R7 (2021–2026) 261-021-270-015

A race-proven shock absorber at a price point that makes sense for budget-conscious teams and club racers alike, the K-Tech TRDS-R brings genuine championship-level suspension technology to the Yamaha YZF-R7 without demanding a factory-size budget. The 'R' in TRDS-R stands for Regulation — a design philosophy that delivers precise, repeatable damping adjustment whether you are chasing lap times at a club round or competing under strict championship cost regulations.

Key Features

• Through-Rod damping technology eliminates the need for an external reservoir, keeping the unit compact and reducing installation complexity on the YZF-R7.
• Superior heat dissipation over long race stints ensures consistent performance from the first lap to the last — no fade, no guesswork.
• 18 compression clicks and 12 rebound clicks (suggested baselines) give riders and technicians a wide, clearly defined adjustment range without specialist tooling.
• 10 mm preload adjustment (suggested) allows rapid spring-rate fine-tuning to suit rider weight and track surface.
• Race-validated at the British Superbike Championship and the Isle of Man TT, proving the unit's reliability under the most demanding real-world conditions.
• 45 mm RCPU housing diameter and 14 mm rod diameter deliver a robust, stiff chassis platform suited to both road-legal track days and full competition use.

Through-Rod Technology in Everyday Use

The Through-Rod design is what sets the TRDS-R apart from conventional piggyback units. By routing the damping circuit through the rod itself, K-Tech achieves a more linear response across the full 55 mm stroke, while the absence of an external canister simplifies clearance around the YZF-R7's rear subframe. For a privateer racer or weekend track-day enthusiast, this translates directly into a shock absorber that is easier to fit, easier to adjust, and easier to understand — without surrendering any of the performance that professional teams demand.

Performance Consistency Over Distance

Heat build-up is the silent enemy of rear suspension. The TRDS-R's internal architecture manages thermal load efficiently, maintaining oil viscosity and damping character throughout extended sessions. Teams running British Superbike and competitors tackling the Isle of Man TT have chosen this unit precisely because its behaviour at lap 20 mirrors its behaviour at lap one. For the club racer, that same consistency means you can trust your suspension settings from the opening practice session through to the final race.

Fitment & Compatibility

This shock absorber is engineered specifically for the Yamaha YZF-R7, covering all model years from 2021 through to 2026. Part number 261-021-270-015 confirms exact fitment. Installation by an authorised K-Tech Service Centre is recommended to ensure correct spring pre-load, damping baselines, and warranty validity.

Specifications

• Spring series: 5959-150
• Overall length: 309 mm
• Stroke: 55 mm
• Compression clicks: 18 (suggested baseline)
• Rebound clicks: 12 (suggested baseline)
• Preload: 10 mm (suggested baseline)
• RCU adjustment travel: 4.00 mm
• RCPU housing diameter: 45 mm
• RCPU rod diameter: 14 mm
• Intended use: Racing, including British Superbike and Isle of Man TT