2 pack 20" bike tubes 20x1.90/1.95/2.125 sv32mm schrader valve 20" bmx bicycle tire tubes compatible with 20x1.75 20 x 1.90 20 x 1.95 20x2.0 20 x 2.10 20 x 2.125 mountain bike tire tubes yunscm two new genuine 20" x 1.90 to 2.125" schrader valve bicycle inner tubes. bulk packaged, without any retail packaging included.<br>tube weight - 160g<br>valve type & length: schrader; 32mm with cap<br>great for kid and bmx tires<br>mold cured rubber for consistent side wall–prevents high pressure blow outs<br>high quality, reliably tested inner tube