Author Tube AT-CROSS-700C Wide FV48 700x35/50C (Black) - 48mm Presta Valve Butyl Inner Tube

With a generous 35–50 mm width range, this 700C inner tube is built to handle everything from fast hybrid commutes to rugged cyclocross runs. The 48 mm Presta valve gives you the reach you need for deep-section rims, while the removable core makes sealant installation a breeze.

Overview

The Author Tube AT-CROSS-700C Wide FV48 is a high-quality butyl rubber inner tube designed for 700C wheels with tire widths from 35 mm to 50 mm. It features a 48 mm Presta valve with a removable core, making it compatible with a wide range of road, hybrid, and cyclocross bicycles. The tube is black with a brass valve stem and comes with a plastic valve cap and valve nut. Sold individually, it offers reliable air retention and standard puncture resistance for everyday riding.

What stands out

• Wide tire compatibility: fits 700C tires from 35 mm to 50 mm (ETRTO 35-622 to 50-622).
• Long 48 mm Presta valve: ideal for deep-section rims; removable core allows easy sealant use.
• Durable butyl rubber construction: excellent air retention and resistance to punctures.
• Complete with valve cap and nut: ready to install right out of the box.
• Universal fit: suitable for hybrid, cyclocross, and wide-tire road bikes.

Technical details

• Product type: Bicycle inner tube
• Wheel size: 700C (ETRTO diameter 622 mm)
• Tire width range: 35–50 mm (ETRTO 35-622 to 50-622)
• Valve type: Presta (FV), 48 mm length, removable core
• Valve stem material: Brass
• Tube material: Butyl rubber
• Color: Black tube, silver/brass valve stem
• Included: Plastic valve cap and valve nut

Our verdict

A versatile and reliable inner tube that covers a broad spectrum of 700C tire widths, making it a smart choice for riders who switch between road, hybrid, and cyclocross setups.