The Giotto 60 mm with 50D, 54D, 58D, and 61D X 60mm Professional Figure Wheels are exactly the same as the Giotto 63mm Wheels, but offer a little lower Center of Gravity to be able to dig into the edges in the Loops and provide a great range of Grip and lot's of Roll and are the World Standard for Loops by which all other Figure wheels are compared.
The Giotto Professional Figure Wheels are primarily used for the Loop Circles. Most of the World level Figure competitors use the 60mm for the Loops Circles and use combinations of hardnesses of the Giotto Professional Loop Figure Wheel to achieve the best Skating result. Roll-Line has developed this wheel giving it properties that provide great roll with just the right amount of grip for figures.
Compulsory Figures are high precision exercises. The feet transmit the impulses to the skating boot and thus to the steering (for the direction) and finally to the wheel (for contact with the skating surface).
The Roll-Line Giotto Professional Figure Wheels (50D, 54D, 58D, and 61D) are a Lo-Profile wheel with exceptional Roll characteristics with extremely Close Tolerances for Roundness, Trueness, and for the Cage where the Bearings and Spacers are mounted.
The Roll-Line Giotto Professional Figure Wheels are a MonoCompound Elastomeric ThermoPlastiche wheel, which is produced utilizing an injection system and is Silver Chromed.
The 50D, 54D, 58D, and 61D provide a great varying range of grip in the wheel material and is for a skating surfaces with a range of grip. For most Skaters, a hardness one (1) level softer than is used for the Long Circles, is what is generally used for Loops, including the Push Wheels (1 Step DOWN).
The wheel hardness is identifies by the color.
Most skaters in the USA use the 61D, while stepping down to the 54D or sometimes the 58D for the inside toe wheels as additional Push Wheels.
The softer the wheel, or lower Shore "D" hardness number, the more the grip and slightly less roll.
The harder the wheel, or higher Shore "D" number, the more the roll, with slightly less grip.