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When in use, modern trekking poles resemble ski poles as they have many features in common, such as baskets at the bottom to prevent the pole sinking through unstable surfaces, and rubber-padded handles and wrist straps to strengthen holding grip. Their maximum length is usually 135 cm (54 inches), however, unlike ski poles, they are often made ...
The recommended weight roughly corresponds to a flex rating that is determined by the manufacturer by applying a standardized amount of stress (most commonly a 50 lb (23 kg) weight) on the pole and measuring how much the center of the pole is displaced. Therefore, two poles rated at the same weight are not necessarily the same stiffness.
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This provided greater balance than one pole could provide and made pushing through the snow easier. [6] Early ski poles were made of pine and bamboo, materials which today are used for novelty poles. [6] US patents for steel ski poles began in 1933 when John B. Dickson invented a new design calling for the use of steel as the shaft material. [8]
Base weight can be lowered by reducing the weight of individual items of gear, or by choosing not to carry that gear. Ultralight backpacking is most popular among thru-hikers. In the United States, the terms "light" and "ultralight" often refer to backpackers who carry gear with a base weight below 6.8 and 4.5 kg (15 and 10 lb) respectively.
His winning height of 6.10 m (20 ft 0 in) represented not only his best ever season opener but also the highest season-opening performance of any pole vaulter in history. He also broke Bubka's record of 11 vaults of 6.10 m or higher (including indoors and outdoors).