flat enough to ensure stability

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Plates that ruled the speed market in this order from late 70’s to early 90’s: XK4 single action, XK4 double action, Magnum 45 double action, same time as the Magnum were a couple double action nylon plates. Then in 85 the Italian plate design began taking over. Plates such as Boen, Whip, and in recent the Roll-line and Star all have 15-19 degree trucks which have proven over many years they are more stable as well has responsive action. These plates are also designed with longer wheel base for additional stability in the turns. Late 80’s to 90’s Labeda Pro-Line, Hyper Power Track, with 5-7 degree double action took the indoor speed market by storm.

5-7 degree trucks proved to be very stable and provide tremendous power transfer. Without any question this change enhanced the sport of speed skating and in most cases ended up breaking all the speed records.