Bicyklová duša FISCHER 28/29 palcov auto ventil ETRTO 50-622 / 54-622 / 57-622

The FISCHER Bicycle Tube 28/29" with auto (Schrader) valve is an inner tube designed to fit tyre/ rim combinations with ETRTO sizes 50-622, 54-622 and 57-622. It serves as a direct replacement for damaged or punctured tubes on compatible city, trekking and mountain bicycle wheels, giving a simple and reliable option for restoring tyre function. The tube's auto valve enables inflation at common service stations and with standard pumps equipped for Schrader valves.

Advantages

This inner tube offers compatibility across several ETRTO widths for 28/29" wheels, reducing the need to match an exact tyre width when selecting a replacement. The Schrader (auto) valve simplifies air topping at public pumps and many home compressors, while the tube construction focuses on providing a practical balance of durability and ease of installation. Its design supports routine on-bike repairs and workshop replacements without specialised tools.

Suitable for

• City bicycles with 28"/29" wheels and tyres in the listed ETRTO ranges
• Trekking and commuter bikes where a robust Schrader valve is preferred
• Mountain bikes with wider tyres that match ETRTO 50-622, 54-622 or 57-622
• Spare tube kits for roadside repairs and routine maintenance

Key specifications

• Wheel diameter compatibility: 28/29 inches
• ETRTO tyre widths: 50 mm, 54 mm, 57 mm (for 622 mm bead seat diameter)
• Valve type: auto (Schrader) valve
• Intended use: inner tube for bicycle tyres (city, trekking, mountain)

How to use

Deflate and remove the wheel from the bicycle, then carefully unseat one side of the tyre and extract the damaged tube. Insert the new FISCHER tube into the tyre, seat the tyre bead evenly on the rim and partially inflate to ensure the tube is not pinched. Fully inflate to the tyre manufacturer's recommended pressure, checking that the valve is perpendicular to the rim and properly secured. Refit the wheel and perform a short test ride to confirm correct installation and inflation.

Recommendations

Check the tyre sidewall for the correct ETRTO sizing before installation and use a pump compatible with Schrader valves. Avoid over-inflation beyond the tyre rating and inspect the tyre and rim strip for sharp objects or damage that could cause repeat punctures. Carry a spare tube and basic repair tools for trips where immediate replacement may be required.