The Turbo Talc Tubes offer an economical way to reduce rotating weight on your bike. A patented, oversized 4.8cm valve base prevents tearing, while a partially threaded valve stem provides a clean interface with pumps. This is the lightest and most supple tube offering available. The tube has been proven in rolling-resistance testing to reduce drag by as much as 13% per wheel. The thinner tube design saves approximately 40 grams of rotating weight, and the talc packing makes installation easier.