I donít have to convince you to buy valve extensions because you need them to inflate your tires on your aero wheels, so you have to buy them. I will tell you, however, what is awesome about the Zipp Valve Extensions - they come in sizes that work perfectly with all the different depths of Zipp wheels, so you donít have to wonder if you got them long enough. Please note that they are sold individually and if you are using Zipp Tangente tubular tires you should go up one size for proper fitment.
27 mm (1.05") for older (red) 202 wheel sets.
33 mm (1.3") for 303 and new 202 (32 mm profile) dimpled wheel sets.
48 mm (1.9") for 404 dimpled wheel sets.
72 mm (2.9") for dimpled 808 wheel sets.
98.26 mm (3.9") for dimpled 1080 wheel sets.