Schwalbe No. 4 Inner Tube - 16/18"

16/18 inch inner tube with different types of valves. Extreme air pressure stable! The rubber compound makes it possible: less air leakage and less to pump. Extremely reliable! Quality control for safe riding pleasure: each Schwalbe tube is checked twice on air retention in the factory. Fits the following dimensions: 37-340 (16 x 1 3/8) 28-349 (16 x 1 1/8) 37-349 (16 x 1 3/8) 28-355 (18 x 1 1/8) 35-355 (18 x 1,35) In general valves can be separated into three different groups : Presta valve: Sclaverand valve,Race valve, French valve Dunlop valve: Wood, Bicycle or Dutch valve Schrader valve: Standard, Car or Moto valve Manufacturer item code: 10410311 10410310 10410313 Valve type: Dunlop (Wood) ||| Presta (Sclaverand) ||| Schrader (Auto) Weight supplement: manufacturer information