The turbo ultralight road tube with new patent pending valve and valve base is proven in rolling resistance testing to reduce drag by as much as 13 per wheeltalc in the pack for a better ride and fewer flats large 48cm base prevents wear and tear on the rim to valve interface threading only at bottom half of valve stem allows secure fit to rim presta valve only smooth at the top for easier pump head insertion thinner tube than our standard tube saves 40 grams of rotating weight 06mm thick