The long valve inner tube enables you to use these with deep section rims (40mm, 50mm and above) as the shorter valve would not extend out of the rim valve hole. Shorter valve inner tubes are ideal for wheels with rim depths of 24mm or 30mm. Presta valve tubes are most commonly used for road wheels (700c) and on a few MTB wheels as the valves are thin, whereas Schrader valves are more commanly found on MTB wheels as valve is larger and won't fit through 700c rim valve holes….
– Continental Quality Road Long Valve Inner Tube Inner Tubes – £3.98 (RRP – £)