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The name SISpeed is programme: It only needs a few grabe handle to change the inline-skate-shoe into an ice-skate-shoe. Basis of it are a stable outboard shoe of polyurethane, a padded inboard shoe, skid and a roller bearing. Skid and roller bearing can be easily changed because of the roove and tongue function. They can be fixed by hand with small screws. Strong klett-breech alloweds a safety halt. The SISpeed is space-saving. The design is different from conventional models: racing ability and sportiness are in foreground. An optimal wear comfort are given by perfect anatomical adaption of a humans feet.