Never have a flat tire again!
A solid urethane wheelchair urethane inner tube can be used as a replacement for many standard pneumatic (air-filled) inner tubes.
Please note that most wheelchairs do not use 2-piece split rims. This means mounting inserts require a little bit more effort and patience than mounting traditional pneumatic tubes and tires but the results are usually worth the accomplishment.
⚠ WARNING California Residents:
Proposition 65 Warning