The Hartex Compact inner tube fits 20-inch tyres in the 20x1.75 to 20x2.25 range, with ETRTO compatibility 47/57-406. Its butyl construction is a practical everyday choice for children’s bikes, BMX-style bikes and compact utility wheels using this rim diameter.
Check the tyre sidewall for the 406 mm bead-seat diameter and a width between 47 and 57 mm before fitting. The rim must also be drilled for a Schrader valve, and the 48 mm valve length should suit most standard-depth rims.
| Type | Inner tube |
|---|---|
| Brand | Hartex |
| Model | Compact |
| Tyre size | 20x1.75/2.25 |
| ETRTO range | 47/57-406 |
| Valve | Schrader, 48 mm |