CTISCentral Tire Inflation System
Precise tire pressure adjustment on the go
- Mechanically operating
- Immediate inflating and deflating after turning ON
- No restrictions regarding tire pressure and driving speed
- Pressureless when turned OFF
TISWVti.systems Wheel ValveAdjust tire pressure while vehicle is moving
Internal air lines through axles (prepared axles required)
ti.systems Wheel Valve (TISWV)
- Airtight as a regular tire valve
- Opens and closes reliably using air pressure
- High-grade material (anodized aluminium)
- Perfect fit for Hutchinson rims
- Adaptable to most other rims
Maximum durability and reliability!
- Lines pressureless when system is off
- Thus, extended lifetime of rotary unions
- Thermal application -40°C to +70°C
Purely pneumatic!
- No electric or electronic components
- Hard-wearing
- Virtually no maintenance
- No electromagnetic compatibility test required
CTIS | TISWV
ti.systems Wheel Valve | TISWV
- Fording ability
- Possibility of integration of regular tire valve
- 5.8 cm
- Width
- 6.5 cm
- Height
- 4 cm
- Length
- 191 g
- Weight
- Rate of air flow
- up to ~400l/min
- Static temperature range
- -30°C to +120°C
- Dynamic temperature range
- -10°C to +80°C
CTIS | Operating Units | Control Unit
CTIS preset 4|1 operating unit*
- Same pressures in the front | rear
- One rotary switch for 4 adjustable pressure presets
- 16 cm
- Width
- 9 cm
- Height
- 8.5 cm
- Length
- 1.5 kg
- Weight
- -40°C to +70°C
- Thermal application
*combination with one CTIS control unit required
CTIS preset 4|2 operating unit*
- Different pressures in the front | rear
- One rotary switch for 2×4 adjustable pressure presets
- 25 cm
- Width
- 10 cm
- Height
- 8.5 cm
- Length
- 2.7 kg
- Weight
- -40°C to +70°C
- Thermal application
*combination with two CTIS control units required
CTIS 3+1
- 3 different preset pressures for front | rear respectively
- 4th setting lets the user freely select any needed pressure for front | rear respectively
- Minimum and maximum pressure protection integrated according to individual requirements
- 15 cm
- Width
- 10.7 cm
- Height
- 25 cm
- Length
- 4.4 kg
- Weight
- -40°C to +70°C
- Thermal application
*combination with two CTIS control units required
CTIS control unit
- Adjusts the pressure of all tires to selected setting
- Stops automatically when the target pressure is reached
- Full transmission of compressed air
- 1 unit is required for CTIS preset 4|1
- 2 units are required for CTIS preset 4|2 and 3+1
- 15 cm
- Width
- 12 cm
- Height
- 20 cm
- Length
- 4.4 kg
- Weight
- -40°C to +70°C
- Thermal application
See the CTIS preset 4|2 in action on an AROCS 6×6!
- Mercedes-Benz Arocs 6×6
- Vehicle
- 445/65R22,5 MPT
- Tire dimension
| Time | Front | Rear |
|---|---|---|
| approx. 3 minutes | 6 bar5 bar | 5.5 bar3 bar |
| approx. 2 minutes | 5 bar3.5 bar | 3.0 bar2.5 bar |
| approx. 2 minutes | 3.5 bar2.5 bar | 2.5 bar1.5 bar |
| Time | Front | Rear |
|---|---|---|
| approx. 10 minutes | 5 bar6 bar | 3 bar5.5 bar |
| approx. 6 minutes | 3.5 bar5 bar | 2.5 bar3 bar |
| approx. 3 minutes | 2.5 bar3.5 bar | 1.5 bar2.5 bar |
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Mercedes AROCS 6×6 | Central Tire Inflation System CTIS preset 4|2
ti.systems | CTIS
Our central tire inflation system (CTIS) is an extremely robust and convenient system for pressure adjustment on the go.
Thanks to our new ti.systems Wheel Valve (TISWV), trucks with prepared axles can be equipped with our purely pneumatic CTIS preset 4|1 or preset 4|2. Once turned on, the system allows the user to select from up to 8 individually preset tire pressures with just a flick of the wrist and can be conveniently operated from the driver’s cabin. Only then, our TISWVs are opened and the air lines are under pressure. As soon as the desired pressure is reached and the system is turned off, all lines are pressureless and the TISWVs are closed – a very big advantage as the seals and rotary unions will wear significantly less and air cannot leak through the valves when the vehicle is standing still for longer periods of time.
The compact TISWV is adaptable to most rims and optionally comes with an integrated standard Vg8 valve. It has fording ability and operates from -10°C up to +80°C.
The CTIS offers distinct advantages:
- Doubling traction by adjusting tire pressure
- Comfortable and precise tire pressure adjustment on the go
- Fast and easy to operate
- Optional: Different pressures for front | rear
- No electric or electronic components
- No danger of leaking air over night
- Adaptable to most rims
- Air supply by vehicle’s air brake system or a powerful ti.systems AIR SUPPLY
- Preset pressures can be modified in a few minutes by authorized personnel
The CTIS can be fitted on:
- Trucks with prepared axles | 4×4 | 6×6 | 8×8 | single tires
Drive with perfect tire pressure everywhere anytime!
Contact usTechnical details on the CTIS
- What is the CTIS?
- A purely pneumatic central tire inflation system that adjusts all tires while driving. A rotary switch in the cab selects one of up to 8 preset pressures.
- Which vehicles can it be fitted to?
- Trucks 4×4, 6×6 and 8×8 with prepared axles and single tires. Without prepared axles, the CTISr is the retrofit alternative.
- Why are the lines pressureless when off?
- The ti.systems Wheel Valve (TISWV) only opens while adjusting. Switched off, all lines are pressureless and the valves closed – less wear on seals and rotary unions, no air loss when parked.
- How long does a pressure change take?
- Mercedes-Benz Arocs 6×6, 445/65R22.5, CTIS preset 4|2: deflating from 6/5.5 to 5/3 bar (front/rear) takes approx. 3 minutes, inflating back approx. 10 minutes, including handling.
- STIS, CTIS or CTISr?
- STIS adjusts the pressure while the vehicle is stationary, via spiral hoses. CTIS adjusts it while driving, via air lines inside prepared axles. CTISr also works while driving, with external, detachable air lines – retrofittable to any truck or trailer.
- Where does the air come from?
- From the air brake system or a ti.systems AIR SUPPLY compressor. No electronics on board, so no EMC test is required.
As of October 2026 · Manufacturer information, ti.systems GmbH, Neuss
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