Author Tube AT-CROSS-700C FV48 700x25/38C Bicycle Inner Tube (Black)

A punctured tire can stop any ride in its tracks, but the right inner tube gets you rolling again with confidence. The Author Tube AT-CROSS-700C FV48 is a reliable replacement tube engineered for 700C road, hybrid, and cyclocross bicycles. With a width range of 25mm to 38mm and a 48mm Presta valve, it fits a wide variety of rims and tire setups, making it a versatile spare for your saddle bag or workshop.

Who is it for

This tube is ideal for cyclists who demand dependable performance on paved roads, light gravel, or urban commutes. Whether you ride a road bike with 25mm tires or a hybrid with 38mm tires, the AT-CROSS-700C adapts seamlessly. It's also a smart choice for bike mechanics and enthusiasts who keep spare tubes on hand for quick repairs.

Main features

• Fits 700C wheels with tire widths from 25mm to 38mm (ETRTO 25/38-622).
• 48mm Presta valve with removable core for easy inflation and compatibility with most pumps.
• Constructed from butyl rubber for excellent air retention and durability.
• Seamless construction ensures uniform thickness and reduces the risk of blowouts.
• Brass valve stem resists corrosion and provides a secure fit.
• Includes a plastic valve cap to keep dirt and moisture out.

Specifications

• Product type: Bicycle inner tube
• Wheel diameter: 700C (28 inch)
• Tire width compatibility: 25-38mm
• ETRTO: 25/38-622
• Valve type: Presta (FV)
• Valve length: 48mm
• Valve core: Removable
• Material: Butyl rubber
• Color: Black
• Intended use: Road, hybrid, cyclocross
• Construction: Seamless
• Puncture resistance: Standard
• Valve stem material: Brass
• Valve cap material: Plastic
• Packaging quantity: 1 tube

Tips

Always check your tire sidewall for the correct size before installing. To extend tube life, keep tires inflated to the recommended pressure and inspect for debris after every ride. Carry a spare tube and a mini pump or CO2 inflator on long rides to avoid being stranded.