Öhlins shock absorber TTX Road & Track BM 147 for BMW R 1200 GS 2013-2018 and R 1250 GS 2019-

Product Details

Öhlins TTX Road & Track BM 147 shock absorber, monoshock front, gas-pressure twin-tube damper with externa, fixed reservoir; adjustable rebound damping, adjustable compression damping damping; piston diameter 36 mm; with ABE for BMW
R 1200 GS, model year 2013-2018
R 1250 GS, from model year 2019-

On ESA models, a warning light will be triggered on the display. This does not affect performance.

General Description

Cavitation is devastating for a shock absorber, as it means the loss of damping and is therefore something you absolutely do not want to experience in your shock absorber.
The small bubbles that form in the oil during cavitation can never support the desired damping characteristics of your shock absorber.

Traditionally constructed dampers can easily fall victim to cavitation under extreme conditions due to the low pressure behind the piston.

The TTX system was designed by Öhlins development engineers to prevent the risk of cavitation in the shock absorber. The plan worked. Thanks to a sophisticated pressure balance of the TTX technology, the risk of cavitation was banished from the shock absorber.

The 'TT' stands for 'Twin Tube', i.e. the twin-tube design, while the 'X' in the designation describes the flow direction or the arrangement of the valves in the cylinder head of the TTX shock absorber.
Thanks to TTX technology, the pressure that normally builds up directly above the piston is directed towards the cylinder head and to the adjusters for compression and rebound damping.

It then enters the free space between the inner and outer tube on the opposite side of the piston. All this happens so quickly thanks to ingenious bores and sophisticated channel routing that one can almost speak of a balanced pressure ratio on both sides of the piston.

The reservoir of the TTX damper is only used during the compression and rebound of the shock absorber to either absorb the oil expanded by heating or displaced by the piston shaft, or to return it to the circuit. In the reservoir, there is a separator piston between the damper oil and the nitrogen located on the other side of the separator piston. The gas generates an oil pressure of six to nine bar, which essentially corresponds to the static pressure on both sides of the main piston.

In addition to its use in shock absorbers, Öhlins also relies on TTX technology for the construction of front wheel forks and cartridge kits. As is already known from Öhlins, the TTX technology was also first introduced in the racing sector after long test series to win races and championships under extreme conditions.
Just two years after its introduction in racing, TTX technology was available for purchase by everyone.
Following great success in sports and with Supersport and Superbike motorcycles for street, the development has now also made its way into the field of dual-sport motorcycles and adventure touring bikes. TTX technology is also ready for use in mechatronic segment.