One inch can mean tons

RSD Phases 1 and 2

Reduced Stopping Distance was implemented in phases, generally known as RSD1 and RSD2. The Federal Mandate was aimed at making roads safer and began in 2011 with what is known as the typical tractor. The largest impact group comprised the first phase. Each OE had to perform testing and document the tested configurations.

Traction

Wheel slip occurs when power is routed to any one outer end of drive axles due to an extreme low coefficient of rolling resistance within the group.  This can be very frustrating to drivers, and very damaging to equipment once that spinning tire gains traction.