Duolever

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Duolever front suspension from BMW

Duolever is a front suspension for two-wheelers from BMW . It is the successor to the Telelever design and was first used in the K 1200 S in 2004 .

Basics

The basis for the Duolever construction is the Hossack fork by the British engineer Norman Hossack. Hossack developed a similar concept for its BMW K 100 RS HOSSACK as early as the 1980s, which even back then provided for a double longitudinal control arm for the front wheel guidance. The Hossack fork construction was used by Claude Fior and John Britten in motorcycle racing.

Design features

With the Duolever front suspension, a wheel carrier (fork) with two trailing arms forms a four-bar gear . The two trailing arms are supported at two points on the frame (triangular arms). An upper steering head takes up the handlebar mounting. Two other connected wishbones between the handlebar shaft and fork transmit the handlebar movements.

In the system, the suspension is taken over by a central strut that is inserted between the lower trailing arm and the frame.

advantages

  • high stability thanks to the low-lying trailing arm
  • little immersion of the suspension when braking

disadvantage

  • complex construction
  • comparatively high weight
  • Lack of feedback from the front wheel when driving in a sporty manner

use

BMW uses the Duolever construction in the following motorcycle models:

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