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Continental Wide 24" D40 RE 50-507–60-507 Dunlop 40 mm inner tube is designed for 24-inch bicycle wheels with wider 50–60 mm tyres, providing reliable air retention and compatibility with a Dunlop valve.
Key Features
Construction and Design
The tube is made from elastic butyl rubber, which holds air well and adapts to the shape of a compatible tyre. The Wide version is intended for wider 24-inch tyres, making it suitable for city, trekking, MTB and youth bicycles with larger-volume tyres.
The 40 mm Dunlop valve is practical for everyday use and is commonly found on city and trekking bikes. A correctly selected tube helps maintain stable tyre pressure and smooth riding performance.
Main Functions
The Continental Wide tube helps maintain the required air pressure inside the tyre and supports consistent tyre performance on different surfaces. It is suitable for daily city riding as well as lighter trails and gravel roads.
Butyl rubber provides good air retention, so the tyre usually needs inflating less often than with lower-quality tubes. The elastic material also helps the tube expand correctly inside the tyre.
Use and Compatibility
The tube is made for 24" wheels with a 507 mm rim diameter and 50–60 mm wide tyres. It fits tyre sizes from 50-507 to 60-507, so the ETRTO marking on the tyre sidewall should be checked before installation.
The 40 mm Dunlop valve fits rims designed for Dunlop or Auto valve openings. Before fitting, it is important to make sure the valve matches the rim hole type and that the tube is not twisted or pinched between the tyre and rim.
Additional Features
This tube is suitable as a spare for rides or as a replacement for a worn or punctured tube. Its compact packaging makes it easy to carry in a backpack, bicycle bag or repair kit.
When installed correctly and inflated to the pressure recommended by the tyre manufacturer, the tube helps maintain good rolling performance and reliable tyre function. It is a practical choice for cyclists using wider 24-inch tyres.
Summary
Continental Wide 24" D40 RE 50-507–60-507 Dunlop 40 mm inner tube is made for 24-inch bicycles with wider 50–60 mm tyres. It is best suited for city, trekking, MTB and youth bikes that need a reliable butyl tube with a Dunlop valve and good air retention.
