Sunlite 27.5 x 2.10-2.35 Tube 48mm Schrader Valve Removeable CoreThe Sunlite 27.5 x 2.10-2.35 Tube uses butyl rubber with a wall thickness of 0.9mm. This tube has a 48mm Schrader valve with a removeable core. Get your bicycle moving again with a replacement tube.072774635375