Features:

• SIZE:: Tube 20 x 2.125, ETRTO 54-406, RIM Width 20 mm with a tolerance of +/- 1 mm. Follow the SIZE: chart to help choose the SIZE: you need.
• ECONOMICAL: No more wasting your hard-earned money on tubes. With the Stop-A-Flat you will never need to change an inner tube again. When you replace your tubes with Stop-A-Flat it will save hundreds of dollars and countless hours.
• VERSATILE: The Stop-A-Flat has many uses and applications for all wheeled vehicles including bicycles, trailers, joggers, strollers, and more!
• QUALITY MATERIAL: Made from Ethylene Vinyl Acetate (EVA Foam). EVA foam is safe and resilient and is used in many everyday items including sneakers and fitness mats. Manufactured through closed cell construction, they are light-weight and waterproof.
• CAUTION: These tire inserts are NOT compatible with Raleigh or Schwinn bicycles produced prior to 1980.

Product Details:

• Brand: Stop-A-Flat
• Valve Type: Schrader
• Material: Puncture Proof Foam
• Wheel Size: 20 Inches
• Item Diameter: 20 Inches
• Brand Name: Stop-A-Flat
• UPC: 664332864374
• Global Trade Identification Number: 74
• Manufacturer: Cycle Force Group
• Model Number: 820000102
• Manufacturer Part Number: 820000102
• Warranty Description: 90 Day Limited
• Item Type Name: Bicycle Tube
• Included Components: Puncture Proof Tube
• Valve Type: Schrader
• Wheel Size: 20 Inches
• Compatible Tire Width Minimum: 1.75 Inches
• Compatible Tire Width Maximum: 2.13 Inches
• Bike Type: Mountain Bike
• Item Diameter: 20 Inches
• Item Width: 2.13 Inches
• Size: 20 x 2.125"
• Material Type: Puncture Proof Foam