Duolever
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:
- BMW K 1200 S.
- BMW K 1300 S.
- BMW K 1200 R.
- BMW K 1300 R.
- BMW K 1200 GT
- BMW K 1300 GT
- BMW K 1600 GT
- BMW K 1600 GTL
Web links
- The innovative Duolever front wheel control of the BMW K1200S ( Memento from October 31, 2007 in the Internet Archive ) Müller, Reichl, Brandl, BMW AG - Lecture on fahrwerk.tech 2005 by TÜV Süd (PDF file; 2.98 MB)
- Duolever in the BMW Motorrad technology lexicon
- Norman Hossack Design