Roll-Line Wheels - GIOTTO (55mm)
GIOTTO 47D – 55mm SPECIAL Professional FreeStyle Wheel
THIS PRODUCT IS ON BACKORDER! 1-6 MONTHS TO SHIP
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Hardness: Blue 47D
Compound: MonoCompound Elastomeric ThermoPlastiche Formula
The Giotto 47D SPECIAL Professional FreeStyle Wheel provides an EXTRA amount of Grip for VERY Slippery Skating Surfaces. The Giotto is less expensive (than the Urethane counterparts), yet, very high quality wheel, which is used on many types of skating surfaces including standard wood floors coated with plastic or poly urethane, but also unusual surfaces like, tile type basketball and volleyball courts, tennis courts (Indoor or outdoor), and concrete or terrazzo surfaces that are more common around the World. The Giotto FreeStyle Wheels are used a great deal internationally, where there are few indoor skating centers like there are here in the USA. The Giotto FreeStyle wheels are most often used on abusive surfaces where the life expectancy of the wheels on these tough surfaces are not very long, but very High Skating Quality both Grip and Roll are required. Many of the world level FreeStyle competitors use combinations of hardnesses of the Giotto to achieve the best Skating result. This SPECIAL Giotto 47D is also sometimes mixed with the Urethane sets of 55mm wheels to provide that extra grip for a Spin Pivot Wheel on VERY Slippery Skating Surfaces. Roll-Line has developed this wheel giving it properties that withstand the extreme and unusual abuse a FreeStyle skater and an abusive Skating Surface can dish out, but will show the wear and can have flat spots put on the wheels if used on too tight of a Skating Surface. The Roll-Line Giotto SPECIAL Professional FreeStyle Wheel (47D) is a Lo- Profile, reasonably durable wheel which is Strong, Light, and with extremely Close Tolerances for Roundness, Trueness, and for the Cage where the Bearings and Spacers are mounted. The Roll-Line Giotto FreeStyle Wheels are a MonoCompound Elastomeric ThermoPlastiche wheel, which is produced utilizing an injection system and is Silver Chromed. The 47D provides a very special application for very slippery Skating surfaces.
This Note is should come in the Box with the Wheels:
THESE WHEELS ARE MADE OF A SPECIAL COMPOUND WHICH IS SUITABLE FOR VERY SLIPPERY SURFACES
In certain conditions, the Bearings may move within the Wheel but this is due to the softness of the Compound used in the Manufacture of the Wheel and must not be considered a Technical Defect
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.
It is almost always recommended to use spacers in the wheels, when using standard 7mm bearings. Long ago, before the use of Lock Nuts (the nuts that have the Nylon Plastic inserts) to hold the wheels on the axles, Jam Nuts were used, but when the spacer was not as wide as the web of the wheel, or the wheel was not machined accurately, the bearings would lock up, the nut had to be tight, and could not be “backed-off”. This method, of locking the Axle Nut down, did promote proper bearing alignment and did increase the diameter of the axle from 7mm to approximately 14mm, because everything was locked down, which also saved the problems of bent axles. Today we do use Lock Nuts. It is still very advisable to lock everything down (especially for FreeStyle, Jam, and Roller Derby Skaters). Roll-Line does provide Spacers for Roll-Line Wheels with each pair of Frames or they can be purchased separately. Properly locking the Wheels down when using standard bearing types, will also promote longer bearing life.
The Roll-Line 7mm SpeedRace & SpeedMax Bearings , are specifically made for very High Level Competitive FreeStyle Roller Skating and are a very Durable Bearing with lots of ROLL. The SpeedRace & SpeedMax Bearings are Free Rolling with minimal Radial Play which promotes and very evenly distributes the load across the 7 or 8 (of the SpeedMax) balls for optimal Roll and a good amount of Axial Play or Thrust, which is the side movement of the inner race in relation to the outer race. This movement is very important because when Skaters push, we always put side load on the skate to get power in the push or stroke. If the Bearing does not allow for this, it will bind and LOOSE operating speed or ROLL. These provisions in the Race Curvature and Contact Angle allow the Roll-Line SpeedRace & SpeedMax Bearings to ROLL very freely
The Roll-Line SpeedRace Bearings have 7 balls and a rubber sealant Shield and the SpeedMax have 8 balls and a metal Shield and are ONLY available for 7mm Axles. The Roll-Line SpeedRace & SpeedMax Bearings are skated on by most of the World level FreeStyle Skaters and Champions.