Behold, a long sleeve that can be slapped onto your ancient 31.8mm handlebars. Because who needs progress when you can cling onto outdated technology? But hey, if you're one of those who actually believe that a flimsy 31.8mm bar provides comfort and compliance, and you want to resist the trend of using 35mm bars, this product is just for you! And here's the cherry on top, it conveniently works with the OneUp 35mm stem, so you can continue using your favorite archaic bar with a stem that's actually up to date.