In 1997, a frame-steered tractor developed from the T-150K, the HTZ-17221, was introduced. The cab was positioned further back than before, exactly in the center of the axles. The noise level was reduced by replacing the control rods with cables. The power take-off was engaged pneumatically. For the first time, the steering wheel was adjustable. There were hardly any technical differences. The drawbars were stronger than before, and the tow hook had been improved. In 2005, Deutz engines became an alternative to the YaMZ engine. In 2006, a model equipped with a plastic hood and a new cab was introduced; it was initially called the HTZ-17222 and later renamed HTZ-17221-09. In 2010, the power was increased to 180 horsepower, and alongside it came the 210/240-horsepower HTZ-17221-21, which was later called the HTZ-240K. The 240-horsepower model had a 14.9-liter YaMZ V8 engine. The 210-horsepower version had either an MTZ or Deutz engine. In 2013, updated hydraulics with a 90-liter reservoir and a 16+8 transmission were introduced. In 2015, the HTZ-246K equipped with a Volvo Penta engine was unveiled.

In addition to the frame-steered models, HTZ’s lineup included the slightly lighter rigid-frame 160 series, tracked tractors T-150 and HTZ-181, and the smaller successors of the T-25 model, HTZ-2511 and HTZ-3510-3522.

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