These custom Quad speed skates were designed for outdoor racing, but they also work well indoors with firmer wheels. With a glue mount and added carbon fiber sole stiffener they weigh about 1080 grams. All titanium & aluminum H/W. Shoes at 375 are too heavy and will soon be replaced with 270 gram soccer shoed (cleats removed), for a sub-1000 gram skate. Wheels are 99 grams - lightest available outdoor speed wheel. -