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HHR Performance » 2021, R1250GS
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- Year: 2021
- Model: R1250GS
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TTX RT Shock Absorber BM 146
Cavitation. Something you don’t want in your shock absorber. It’s devastating because basically it means the damping is lost. Small bubbles in the oil can never create the necessary damping forces. Traditional dampers working in extreme conditions sometimes suffers from low pressure on the piston backside.
The TTX was created by Öhlins engineers to eliminate the risk for cavitation. They succeeded. With the TTX technology a positive pressure balance is created in the shock which means the risk for cavitation is gone.
TTX stands for Twin Tube with the X illustrating how the flow through the valves in the cylinder head is designed. Thanks to the twin tube technology the pressure usually created on top of the piston is transferred through the cylinder head and the adjusters for compression and rebound, then flows through the space between the inner and outer tube to the other side of the solid piston.
These equals to a pressure balance within the shock. The outer reservoir is only used to take care of the oil displacement from the piston rod and heat expansion, which is why it can be fairly small in design. Inside the reservoir there is a dividing piston between the oil and the nitrogen gas.
Part number
BM 146
Type Code
T39PR1C1S
T
Twin tube
39
Piston diameter: 39 mm
P
Monotube high pressure gas type of shock absorber with external “piggy back” reservoir.
R1
Adjustable rebound damping. Black adjuster on TTX36 shocks / silver adjuster on TTX GP shocks.
C1
Adjustable compression damping. Gold adjuster on TTX36 / TTX GP shocks.
S
Hose mounted hydraulic spring preload adjuster.
Technical data
| Length: | 402.5 mm |
|---|---|
| Stroke: | 75 mm |
| Rate N/mm: | 140 N/mm |
| Position: | rear |
| Mounted spring: | 01103-54 |
| Packaging unit: | pieces |
Notes
ESA version can get warning light in display, this does not affect bikes performance.
Fits for vehicles
BMW R 1200 GS (2013 – 2016)
- Teilegutachten (Germany)
BMW R 1200 GS (2017 – 2018)
- Teilegutachten (Germany)
BMW R 1250 GS (2019 – )
- Teilegutachten (Germany)
Download
- Mounting Instruction Öhlins Motorcycle BM 146 (English) (521,4 KB)
- Owner´s Manual Öhlins Motorcycle TTX shock absorber Road Track (English) (1.407,4 KB)
- Mounting Instruction Öhlins Motorcycle BM 146 (German) (909,6 KB)
- Owner´s Manual Öhlins Motorcycle TTX shock absorber Road Track (German) (1.599,7 KB)
TTX RT Shock Absorber BM 147
Cavitation. Something you don’t want in your shock absorber. It’s devastating because basically it means the damping is lost. Small bubbles in the oil can never create the necessary damping forces. Traditional dampers working in extreme conditions sometimes suffers from low pressure on the piston backside.
The TTX was created by Öhlins engineers to eliminate the risk for cavitation. They succeeded. With the TTX technology a positive pressure balance is created in the shock which means the risk for cavitation is gone.
TTX stands for Twin Tube with the X illustrating how the flow through the valves in the cylinder head is designed. Thanks to the twin tube technology the pressure usually created on top of the piston is transferred through the cylinder head and the adjusters for compression and rebound, then flows through the space between the inner and outer tube to the other side of the solid piston.
These equals to a pressure balance within the shock. The outer reservoir is only used to take care of the oil displacement from the piston rod and heat expansion, which is why it can be fairly small in design. Inside the reservoir there is a dividing piston between the oil and the nitrogen gas.
Part number
BM 147
Type Code
T36PR1C1
T
Twin tube
36
Piston diameter: 36 mm
P
Monotube high pressure gas type of shock absorber with external “piggy back” reservoir.
R1
Adjustable rebound damping. Black adjuster on TTX36 shocks / silver adjuster on TTX GP shocks.
C1
Adjustable compression damping. Gold adjuster on TTX36 / TTX GP shocks.
Technical data
| Length: | 392 mm |
|---|---|
| Stroke: | 88.5 mm |
| Rate N/mm: | 56 N/mm |
| Position: | front |
| Mounted spring: | 21067-12 |
| Packaging unit: | pieces |
Notes
ESA version can get warning light in display, this does not affect bikes performance.
Fits for vehicles
BMW R 1200 GS (2013 – 2018)
- ABE (Germany)
BMW R 1250 GS (2019 – )
- Without "Teilegutachten" (Germany)
Download
- Mounting Instruction Öhlins Motorcycle BM 147 (English) (478,1 KB)
- Owner´s Manual Öhlins Motorcycle TTX shock absorber Road Track (English) (1.407,4 KB)
- Mounting Instruction Öhlins Motorcycle BM 147 (German) (872,1 KB)
- Owner´s Manual Öhlins Motorcycle TTX shock absorber Road Track (German) (1.599,7 KB)
