The Ohlins BM343 TTX RT rear shock is built to deliver consistent damping control for the BMW HP4. Based on the TTX RT architecture, it focuses on maintaining stability and clear tyre feel under demanding road and track conditions. It is supplied as a rear mono shock replacement for the standard unit.

Ohlins | Made to race, perfected to ride

Ohlins TTX technology uses a twin-tube damping layout aimed at keeping damping behaviour consistent as conditions change. The BM343 is part of the TTX RT family, intended for performance-focused riders who want a more controlled, tunable rear end without moving to race-only hardware.

Who this shock is for

  • BMW HP4 riders chasing improved chassis control and traction feel
  • Track day riders who want stable behaviour under braking and on corner exit
  • Owners who value external adjustability to tailor the bike to tyres, pace and conditions

Shock design & features

This shock uses an oil and gas separated design (not an emulsion shock) to support consistent damping under sustained load. The internal TTX layout is engineered to provide predictable behaviour through a wide operating range, helping the rear tyre stay loaded and controlled during acceleration and direction changes.

Tuning controls

The BM343 provides external adjustment for rebound and compression damping, allowing you to balance support, grip and stability to suit your setup. These adjustments are intended for practical tuning of rear-end behaviour such as squat control, mid-corner composure and bump compliance.

Before you install

  • Confirm fitment for BMW HP4 and rear mono shock configuration.
  • Set sag and baseline adjustments after installation so the shock can work as intended.
  • If your unit is being replaced or superseded in your application, verify the correct current part for your intended use.

Serviceability/lifecycle

Like all performance dampers, regular servicing helps maintain consistent damping and seal life. Service intervals depend on use conditions (street, track, weather and cleaning practices), and a refresh is recommended when performance changes or adjustment response becomes inconsistent.

SKU BM343
Model # T36PR1C1LB
Brand Ohlins
Shipping Weight 5.0000kg
Shipping Size 0.300 x 0.300 x 0.500m
Type Units
See our Shipping Information See our Frequently Asked Questions
Position (Front or Rear) Rear Mono
Shock Length Eye to Eye (mm) 353.0 +6/-0
Spring Rate Standard 85.0 N/mm
Type Code T36PR1C1LB
Stroke Metal to Metal (mm) 62.0
Product Family TTX RT
Notes Replaced by BM360: Type TTX GP for race use only
Fitted Spring: 21040-26

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