Seamless 'one-piece' latex inner tubes provide a smooth, balanced ride with no pucker or bump like those found on other tubes.
. Challenge Latex Tube The tube also includes a removable core Presta valve making them compatible with both inline and external valve extenders.Seamless & smooth latex material, no bumps at the valve Improves rolling resistance and comfort Strong and extremely elastic, thus very reliable Is lighter weight than standard butyl and some superlight butyl tubes Has a two-piece removable valve core for valve extender use Handmade construction 700 x 23 - 30mm, 47mm Presta Valve Labeled Size: 700 x 23 - 30 ISO Width (mm): 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 Shaft Type: Smooth ISO Diameter: 622 / Road / 29" Valve: Presta Med 41-55mm Valve Core: Removable Weight: 75 Tube Compound: Latex 700 x 33 - 40mm, 47mm Presta Valve Labeled Size: 700 x 33 - 40 ISO Width (mm): 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 Shaft Type: Smooth ISO Diameter: 622 / Road / 29" Valve: Presta Med 41-55mm Valve Core: Removable Weight: 90 Tube Compound: Latex Latex tubes are lighter, thinner and more flexible than a butyl tube, increasing your comfort, lowering your rolling resistance, and helping to prevent flats.