Continental Supersonic Tube (700 X 20-25, Presta Valve) D3 The ""power Seam"" flat seam

The ""power Seam"" flat seam for maximum stretchability

you're goggles will be fog free for up to five days

When a puncture strikes just too big and gnarly to seal

Elegant integrated design

Continental Supersonic Tube (700 X 20-25, Presta Valve) D3 The ""power Seam"" flat seamUltra light weight inner tube. The Continental Supersonic road long valve inner tube is a must have cycling essential for 700c bike wheels. Super lightweight butyl tube, even lighter than latex but not porous, so no need to reinflate every day. Can also be fixed with a normal puncture kit. The long valve inner tubes enables you to use deep section rims (40mm, 50mm and above) as the shorter valve would not extend out of the rim valve hole. Shorter