The Ohlins KT1990 STX 46 MX is a rear mono shock absorber developed for the KTM 85 SX. It is built around Ohlins’ STX architecture to provide controlled damping and consistent feel across changing track conditions. Supplied without a spring, it is intended to be matched with an appropriate spring as noted for this application.

Ohlins | Made to race, perfected to ride

Ohlins motocross units are designed with a focus on damping control, repeatability and service access. This shock is an Ohlins STX 46 MX family unit intended for off-road competition use.

Who this shock is for

  • KTM 85 SX riders wanting a dedicated Ohlins rear shock upgrade
  • Riders and tuners who want external adjusters to tailor the bike to track conditions
  • Owners prepared to select and fit a suitable spring (no spring supplied)

Shock design & features

This is an oil/gas separated shock design (not an emulsion type), intended to maintain damping consistency as temperatures and workload change. The configuration is suited to PDS fitment as noted for this model.

Tuning controls

  • Rebound damping adjustment
  • Compression damping adjustment with separate low-speed and high-speed circuits

Before you install

  • No spring is supplied; select the correct spring for the specified 00698-series requirement
  • Confirm fitment for KTM 85 SX rear mono / PDS application before installation
  • Use the recommended Ohlins shock oil as specified for this unit

Serviceability/lifecycle

This Ohlins unit is designed to be serviced and re-valved to suit rider preference and conditions. Regular inspection and periodic servicing will help maintain performance and component life.

SKU KT1990
Model # S46PR1C2Q1W
Barcode # KT1990
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) 397.0
Spring Rate No Spring/s Supplied
Type Code S46PR1C2Q1W
Product Family STX 46 MX
Notes PDS, 00698-series spring
Fitted Spring: Sold separately, see notes.
Rec. Ohlins Oil 01304-

More From This Category