Schwalbe 4 x SCHWALBE SV7 20″ 1.5-2.5 BMX Bicycle Inner Tube 40mm Presta Valve Review Posted on March 24, 2019 By DuskunkTagged Cycling, Outdoor Recreation, SCHWALBE, Sports & Outdoors, Tubes This fits your . Make sure this fits by entering your model number. 4 PCS 20″ 1.5-2.5 BMX Bicycle Inner Tube 40mm Presta Valve