Guaranteed Fresh Top-Quality Biketube Brand tm Tubes - Super Value Bundle of 3 Butyl Rubber Road Bike Inner Tubes With Premium 60mm Presta Valves With Non-Removavble Cores - Guaranteed To Hold Air Better Butyl From America's Trusted Bicycle Inner Tube Supplier - Each Tube Is Hand Tested For Strength And Air Retention - Guaranteed To Be Free From Defects Be Sure to Check If You Need A Schrader Valve (Same As A Car Tire) Or Thinner Presta Valve With Nutted Valve Closure On Top - See Our Photos For More Information 700c bicycle inner tubes, from America's respected bicycle inner tube specialist, Biketube Brand. Super Saver Bulk Pack of 3 tubes. Presta valves: 48mm-long threaded brass. Schrader valves: 35mm-long brass. Every Biketube Brand inner tube is individually tested for 24 hours, and dusted with talc to facilitate installation. 18-25mm tubes approx. 99 g. ea., 25-32mm tubes approx. 124 g. ea., 35-43mm tubes approx. 177 g. ea.