However , the primary qualities giving them certain advantage over the quad skates are still the same : bigger speed , capability to roll on rough surfaces , a greater level of sport applications .
The design of inline skates has changed in many ways because their innovation .
The primary qualities giving them certain advantage over the quad skates are still the same : bigger speed , capability to roll on rough surfaces , a greater level of sport applications .
The design of inline skates has changed in many ways because their innovation .