Asphalt Wheel Tracker
HWTT-100 Hamburg Wheel Tracking Tester

The GCTS Hamburg Wheel-Tracking Tester (HWTT-100) was designed to easily perform the Hamburg Wheel-Tracking Test according to AASHTO T 324 and EN 12697-22 testing standards. This system utilizes a water bath for temperature control of the two specimens, which can be tested simultaneously. 


The HWTT-100 is the only system available that does not use a cantilever arm for application of the vertical load. Instead, the load is applied directly above the specimen at all times, resulting in the most accurate system on the market!

The HWTT-100 is the only system on the market that directly applies the vertical load to the specimens during testing. Most systems use a weighted cantilever arm to apply the vertical load, resulting in excessive vibrations and an inability to accurately measure the vertical load. The GCTS system instead utilizes a mobile frame to keep the load directly above the loading wheel and dampeners to prevent vibration of the frame during horizontal movement. With this setup, you can be confident that the load stays at 705N (+/- 4.5N) for the duration of the test.


The HWTT-100 meets all the specifications of AASHTO T 324 and EN 12697-22. Tests can be performed with either stainlesss steel or rubbarized testing wheels, which can be interchanged as needed.

Meets the following test standards:

  • AASHTO T 324
  • EN 12697-22


Systems Specifications:

  • 705N +/- 4.5N constant load
  • Water bath for temperature control up to 70°C
  • Temperature control +/- 0.5°C
  • Stainless steel or rubberized wheels
  • Two wheels for simultaneous testing of two specimens