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 : 114 gr – 20×1.50 – 1.75″ lite, 20×1-1/8″ – 59 gr
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 gr
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 gr
Sizes : 20×1-3/8″, 20×1.50-1.75″, 20×1.95-2.125″, 24×1.50-1.75″