K-Tech TRDS-R Rear Shock Absorber BMW M1000RR K66 (2021-2026) 261-021-030-025

Engineered from the ground up for championship-level competition, the K-Tech TRDS-R rear shock absorber brings race-proven Through-Rod technology and precision-machined components to the BMW M1000RR K66. Every detail of the TRDS-R reflects K-Tech's commitment to uncompromising build quality — from the 45 mm RCPU housing to the 14 mm hard-chromed rod — delivering the kind of repeatable, predictable performance that separates genuine race hardware from imitation.

Key Features

• Through-Rod Damper System (TRDS) provides exceptional consistency across the full stroke, eliminating the pressure imbalance inherent in conventional twin-tube designs
• The 'R' (Regulation) designation enables precise suspension adjustment within current championship cost-cap and regulation frameworks — ideal for riders and teams operating under British Superbike and similar series rules
• Compact, thermally efficient design dissipates heat rapidly during extended race distances, maintaining consistent damping characteristics even under extreme track conditions
• 18-click compression and 18-click rebound adjustment (suggested baseline) give technicians fine-grained control over chassis balance and tyre load
• Race-validated at the highest level of British motorcycle sport, including British Superbike and the Isle of Man TT
• Installation by an authorised K-Tech Service Centre is recommended to ensure correct setup and preserve warranty integrity

Build Quality and Technology

The TRDS-R is built around K-Tech's Through-Rod architecture, a design that runs the damper rod through the full length of the shock body. This creates equal fluid volumes on both sides of the piston, producing a damping curve that responds identically on compression and rebound — a characteristic that riders and race engineers can rely on lap after lap. The 45 mm RCPU housing is machined to close tolerances, while the 14 mm rod delivers the rigidity needed to cope with the punishment of superbike-class kerb strikes and hard braking events.

The 'R' variant has been developed specifically for riders who need championship-compliant hardware without sacrificing the adjustability demanded at the front of the grid. Whether working within the cost regulations of a national series or simply optimising a track day machine, the TRDS-R provides a level of tunability that was previously the preserve of full factory teams.

On Track

With a 370 mm eye-to-eye length, 60 mm of stroke and a suggested preload of 10 mm, the TRDS-R slots directly into the BMW M1000RR K66 linkage without modification. The 4.00 mm of RCU adjustment travel provides meaningful range for fine-tuning ride height and leverage ratio response. Teams running the M1000RR in British Superbike competition will find the baseline click settings a solid starting point, with the adjustment range wide enough to accommodate everything from short, technical circuits to the long, fast sections of the Isle of Man Mountain Course.

Fitment and Compatibility

This shock absorber is engineered specifically for the following application:

• BMW M1000RR (K66) — model years 2021, 2022, 2023, 2024, 2025, 2026

Always confirm your frame code and model year before fitting. Installation by an authorised K-Tech Service Centre is strongly recommended.

Specifications