20" x 1-3/8" Solid (Flat-Free) Urethane Wheelchair Tube Insert Tuffcare Challenger PP 5500 electric bicycle or something the

electric bicycle or something the world isn't even ready for

Stout rugged steel construction

Made with durable materials

It makes an ideal choice for riders seeking knobby performance without going broke

20" x 1-3/8" Solid (Flat-Free) Urethane Wheelchair Tube Insert Tuffcare Challenger PP 5500 electric bicycle or something theNever have a flat tire again! Solid 20"x1 3 8" urethane wheelchair urethane inner tube can be used as a replacement for any 20"x1 3 8" standard pneumatic (air filled) inner tube. 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.