Tire Traction Tester (TTT) 995 | Dynatest



The 995 Tire Traction Tester measures the peak  friction characteristics on paved surfaces and it is used for tire testing to evaluate the dry or self-wetted friction characteristics of tires.


The 995 consists of a fully instrumented tow vehicle and test trailer, that uses a Dynatest two-axis force transducer to provide vertical load and horizontal tractive force measurements. As a pavement measurement device, it meets all the requirements of ISO 23671 and 15222, for wet grip measurements of C1 and C2 tires, as well as standard ASTM-E274, and ASTM-F408.



  • All electronic instrumentation is state of the art and the user friendly, menu-driven Windows® software, which allows the operator to enter and document multiple test parameters. The on-board laptop computer computes the Skid Number (SN) and the Peak Braking Coefficient (PBC) from the two-axis force transducer in real time. Data is stored for future analysis

  • Additional software capabilities include automatic system calibration, full system diagnostics, adjustable test cycle timing.

  • The system is equipped with digital encoders to accurately measure distance and monitor test speeds, a hand remote switch to initiate the automatic test, an industrial rated PC and graphic printer.

  • The operator can display all test results, both graphically and numerically. The computer automatically controls all phases of the testing cycle. 

  • The system software includes Calibration which allows the operator to calibrate the two-axis force transducer. The system’s computer calculates the gain and offset values for the force transducer and graphically displays the results.


Options available

  • Differential Geographical Positioning System (DGPS)

  • Integrated Selcom texture laser 

  • Dual Side water system

  • Blocking bars

  • Stainless steel C1 trailers for longevity 

  • Variety of tow vehicles and water tank sizes