Standard inner tube VS 40 57-406 Smart Tube

Fills multiple punctures over 2 years
Fills punctures of up to 3 mm in the tread
Non-toxic and non-flammable
Cleans up with water

Model: SMART TUBE
Bike tire width in mm: 40/57
Compatible tire diameter in inches: 20
Compatible tire width in inches: 1.50 / 2.125
ETRTO compatible tire dimensions: 40/57-406
Valve : Schrader
Valve length in mm: 35
Valve color: Black
Removable shell: Yes
Preventive fluid: Yes
Inner tube material: Butyl
Weight in grams: 273
Practical: Child, BMX, City