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HSUHigh Speed Uniformity


Low Speed Uniformity testers are only capable of measuring RFV and LFV
at rotational speeds around 60rpm (60 rpm on a 29” outside tire diameter = 5 mph).
Some other conditions, such as Plysteer and Conicity are derived from these
measurements. Testing force variation at  low speeds is similar to the testing of static
unbalance only. In the high speed uniformity mainly the RFV and the Tangential
Force Variation which has not been addressed yet play the important role.
The increase of the LFV is in most cases neglectable! The influence of TFV
begins to develop at about 60 kmph and the full influence is felt at about 120 kmph. 
TS is one of the leading suppliers of the High Speed Uniformity machines.

The HSU of TS combine innovative approaches like damping concrete for high
normal frequencies of the machine frame with established components like the
Kistler measurement hub to generate best test results.


Functional principle: High Speed Uniformity for PC, Light Truck tires

OEM testing according to the test procedures of the   automotive companies. Customized High Speed Uniformity testing to the tire manufacturers internal test standards:


- Tire radial, lateral and tangential (fore-aft) High Speed


- Tire static and dynamic balancing

- Cleat testing

- Tire radial and lateral run out

- Concity and Plysteer


Test specimen:

Motorcycle, passenger car, light truck, truck tires


Technical data:

Testing positions:   1 position


Drum diameter: 1,707m / 2 m


Measurement hub: Kistler Measurement hub


Tire Loading: 1, 2, 2.5 tons


Loading principle: Hydraulic


Speed: 250, 350 km/h


Test standards:  

- ISO 13328, ISO 23671

- SAE J2730, SAE J332, SAE J2731