Excess has 6 different tubes for the BMX wheel sets needed for all riders.

BMX Tubes in small valve (Presta).
Valve length: 60mm.
Ideal for carbon rims.
Weights : 20×1.50 – 1.75″ lite : 114 g / 4.02 oz – 20×1-1/8″ : 59 g / 2,08 oz
Sizes : 20×1-1/8″, 20×1-3/8″, 20×1.50 – 1.75″, 20×1.50 – 1.75″ lite

BMX tubes with small valve (Presta).
Valve lenght : 40mm.
Weight: 20×1-1/8″ : 58 g / 2,04 oz
Sizes : 18×1″,  20×1-1/8″, 20×1-3/8″

BMX tubes with big valve (Shraeder valve).
Valve lenght : 40mm.
Weight: 20×1.50-1.75″ : 149 g / 5.25 oz
Sizes : 20×1-3/8″, 20×1.50-1.75″, 20×1.95-2.125″, 24×1.50-1.75″