The Ohlins BM425 STX 46 Adventure front shock is built for BMW GS models that see mixed-surface use, where consistent damping and control matter. Designed as a front mono shock, it suits riders wanting a more composed front end over rough tracks and long-distance touring conditions. It is supplied as a complete unit for the listed BMW applications.

Ohlins | Made to race, perfected to ride

Ohlins suspension units are engineered for predictable feel and repeatable tuning. The BM425 is part of the STX 46 Adventure family and focuses on stability and rider feedback across varied terrain.

Who this shock is for

  • BMW R 1100 GS, R 1150 GS and R 850 GS riders looking for improved front-end support on adventure and touring rides
  • Riders who want external adjustment to suit changing load and surface conditions
  • Owners replacing a tired OE front unit with a serviceable performance shock

Shock design & features

This is an STX 46 Adventure front mono shock. The design uses separated oil and gas for consistent damping behaviour under demanding use. The unit is supplied with a fitted spring (01096-10).

Tuning controls

The BM425 includes external adjusters for tuning. Rebound damping adjustment is provided, along with spring preload adjustment to suit rider preference and setup.

Before you install

  • Confirm fitment for your exact model and year: BMW R 1100 GS, R 1150 GS and R 850 GS
  • Plan to set sag and baseline adjustments after installation for best results
  • Inspect mounting hardware and bearings/bushes during installation and replace if worn

Serviceability/lifecycle

As an Ohlins unit, the BM425 is designed to be maintained and reconditioned. Routine servicing helps keep damping consistent and extends component life, especially for off-road and touring use.

SKU BM425
Model # S46ER1
Barcode # BM425
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) Front Mono
Shock Length Eye to Eye (mm) 335.0
Spring Rate Standard 52.0 N/mm
Type Code S46ER1
Stroke Metal to Metal (mm) 92.0
Product Family STX 46 Adventure
Notes Front
Fitted Spring: 01096-10
Spring Colour Yellow

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