Sanderson promag-ST magnesium pedals are aimed at hardcore riding due to their stronger beefier design. The body is cast from high grade magnesium for a massive weight saving over aluminium pedals and through the utilisation of knurled contact areas and replaceable pins grip is maximised to ensure sure footed riding. The pedals run on a combination of oilite and sealed cartridge bearings for super smooth operation and long term durability.