1. Öhlins TT44 "straight piggyback".
2. Öhlins TT44 "offset piggyback".
3. Öhlins TT44 "hose".
4. Öhlins TT44 "narrow piggyback" in 36
5. Öhlins TT44 optional 4-way adjuster.
6. Öhlins TT44 hydraulic preload adjuster.
The Öhlins TT44 damper design is the culmination of
two decades of Öhlins successful participation in
world championship events. This damper draws on all
the expertise developed by Öhlins while winning more
than 60 World Championships.
The Öhlins TT44 damper is designed to handle the
demanding damping characteristics needed for all types
of tracks, from street courses to super speedways.
The ability to create high damping forces at very
short strokes, combined with powerful adjusters, will
give you outstanding performance and offer many new
The Öhlins TT44 features a patented concept with a
unique double wall design and two adjustable bleed
valves to control the flow between these tubes. These
valves control the initial compression and rebound
damping and are check-valved to be completely
independent of each other. They meter the oil flow
created by the main piston area, not the flow created
by shaft area displacement. This translates to low
internal pressure during the compression stroke.
Even though damping force builds rapidly, the low
internal pressure prevents high friction from the
shaft seal. The result is excellent short stroke/high
The temperature stability is maintained by using a
flow restriction design in the bleed valves that
create a turbulent flow at very low piston velocities.
Materials with different thermal expansion rates are
used to compensate for the viscosity change of the oil
caused by changes in temperature.
Thanks to the unique design of the bleed valves
(they are not tapered needles working in a fixed
orifice) every step (click) of the adjusters produces
equal and predictable changes in force in the normal
operating range. Optimum settings are easy to find.
The Öhlins shim system with the ring-shim preload
device offers infinite combinations of shim stacks,
giving you the possibility to create just about any
damping curve your mind can imagine, only limited by
the laws of physics. All this with just one piston
The reservoir has a traditional adjustable needle
bleed valve in parallel with it's own shim stack which
works only during the compression cycle. The whole
system is pressurised by nitrogen gas behind a
floating piston to insure separation of the gas and
As an option there is an additional compression
control adjuster available, providing a total of 4
external adjusters. This pressure regulated valve,
unique in many ways, controls only the pressure over
the main piston. It gives new possibilities in shaping
damping curves. For instance "double knee" curves can
be produced easily.