The Ohlins BM180 STX 46 Blackline rear shock is designed for the BMW R18, combining classic Blackline aesthetics with modern damping control. It’s built to improve stability and ride comfort without losing the character of a big-capacity cruiser. This unit is intended as a direct-fit rear shock solution for street use.

Ohlins | Made to race, perfected to ride

Ohlins suspension is developed from a consistent engineering approach: controlled damping, predictable response, and long-term serviceability. The STX platform is aimed at real-world road performance, where compliance and stability matter as much as support under load.

Shock design & features

This is an STX 46 Blackline rear shock with an oil/gas separated architecture to help maintain damping consistency over varied road conditions. The Blackline finish suits heritage and custom builds while keeping the focus on functional suspension performance.

Tuning controls

  • Rebound damping adjustment to manage how quickly the rear returns after a bump
  • Spring preload adjustment to suit rider weight, luggage, and ride height preference

Who this shock is for

  • BMW R18 riders wanting more control and comfort from the rear suspension on the street
  • Owners building a classic or custom look who still want a modern, tuneable shock
  • Riders who value a suspension unit that can be adjusted and serviced rather than replaced

Before you install

Check overall condition of mounting hardware and bushes during installation, and ensure the spring preload is set for correct sag before fine-tuning rebound. After fitting, re-check fasteners and clearances once the bike has been cycled through full suspension travel.

Serviceability/lifecycle

As an Ohlins rear shock, the BM180 is designed to be maintained with periodic servicing to keep damping performance consistent over time. Regular inspection for leaks, bushing wear, and any change in damping feel will help you plan service intervals before performance degrades.

SKU BM180
Model # S46DR1LS (B)
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
Shock Length Eye to Eye (mm) 390.5
Spring Rate Standard 95.0 N/mm
Type Code S46DR1LS (B)
Stroke Metal to Metal (mm) 51.5
Product Family STX 46 Blackline
Fitted Spring: 21103-31

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