Sunlite Inner Tube – 12-1/2 x 2-1/4 (ISO 203) – Schrader 70° Angle Valve

Plain-English Lead

This Sunlite inner tube fits small 12-1/2 x 2-1/4 tires commonly used on scooters, mobility devices, wheelchairs, and similar small-wheel vehicles. The angled Schrader valve makes inflation easier on tight wheel designs.

This tube uses a 70-degree angled valve stem with a removable core for easier maintenance and replacement.

Key Functional Details

• Tire Size: 12-1/2 x 2-1/4
• ISO Size: 203
• Valve Type: Schrader (SV)
• Valve Angle: 70° angled stem
• Valve Length: 32mm
• Valve Stem: Smooth
• Removable valve core
• Wall thickness: 0.9mm
• Flat Fold Width: 47mm
• Platform Type: Scooter / Mobility / Small Wheel

Compatibility & Technical Notes

• Fits tires marked 12-1/2 x 2-1/4
• ISO tire size compatibility: 203
• Designed for small wheels used on scooters, mobility devices, and wheelchairs
• 70° angled valve allows easier access in tight wheel spaces
• Removable Schrader valve core for maintenance
• Not compatible with Presta valve rims
• Always confirm tire size printed on sidewall before ordering
• Platform Type: Scooter / Mobility / Utility wheels

Service / Ownership Context

When installing tubes on small wheels, check the inside of the tire and rim for sharp edges or debris that could puncture the tube. Inflate partially during installation to prevent pinching the tube between tire and rim.

Fit & Use Signals

• Good Fit: Your tire sidewall reads 12-1/2 x 2-1/4.
• Good Fit: Your wheel uses a Schrader valve.
• Good Fit: You need an angled valve for tight clearance.
• Not A Fit: Your tire uses a different ISO size.
• Not A Fit: Your rim requires a Presta valve.
• Not A Fit: Your tire size is 12-1/2 x 2-1/4 but with a different ISO number.