18-inch Schrader Inner Tube for Sunbeam Stun & Dottie Kids Bikes
18 x 1.75-2.125 replacement bicycle inner tube for compatible Sunbeam 18-inch children's bikes using 18 x 2.125 tyres and a standard Schrader valve tube.
Confirmed Model Applications
- Sunbeam Stun 18
- Sunbeam Dottie 18
Published specifications for these models list 18 x 2.125 front and rear tyres and a standard 18-inch Schrader inner tube, so this tube is a direct size match for those specifications.
Tube Specification
- Size: 18 x 1.75-2.125
- ETRTO / ISO family: approximately 47/57-355
- Valve: straight Schrader / AV / car-type
- Suitable tyre size on the listed Sunbeam models: 18 x 2.125
- Use: front or rear wheel
- Condition: new aftermarket replacement
Important Fitment Check
Always confirm the tyre and valve fitted to the individual bicycle before ordering because manufacturers can revise specifications. The tyre should fall within 18 x 1.75-2.125 and use the 355 mm ETRTO diameter, with a Schrader valve rim hole.
Do not order this tube for an 18 x 1 3/8 / ISO 400 mm wheel.
Fitting Advice
Check the tyre casing and rim tape for the object that caused the puncture, lightly inflate the tube before installation, avoid trapping it under the tyre bead, then inflate to the pressure stated on the tyre.