Inner Tube AUTHOR AT-CROSS-700C Wide FV48 for 700x35–50C tires, Presta (48 mm) — black

The AUTHOR AT-CROSS-700C Wide FV48 inner tube is made for 700C wheels and fits tires with widths from 35 mm to 50 mm (700x35–50C). It comes with a Presta (French) valve and a 48 mm valve stem length suitable for many deep-rim and low-profile wheels. This replacement tube is intended for road, gravel and hybrid bicycles as a spare or for routine maintenance, offering a straightforward means to restore rideability after punctures or during planned tyre service.

Advantages

This inner tube provides a reliable, lightweight solution for wide 700C tyres, combining compatibility with a broad tyre width range and a Presta valve preferred on many performance and commuter wheels. The 48 mm valve length reduces the need for valve extenders on moderately deep rims. Its standard but robust construction allows quick installation and exchange during roadside repairs or in a workshop setting.

Suitable for

• Road bikes with 700C wheels and tyre widths from 35 mm to 50 mm
• Gravel bikes that require wider inner tubes for mixed-surface riding
• Hybrid and city bicycles using 700x35–50C tyres
• Riders looking for a spare inner tube for puncture repairs
• Workshops and service kits for routine tyre maintenance

When it may not be suitable

This tube is not suitable for tyre widths smaller than 35 mm or larger than 50 mm; using it outside the recommended range can affect fit and reliability. It is designed for Presta-valve rims and will not fit rims requiring Schrader valves without an adapter or valve conversion.

Key specifications

• Wheel diameter compatibility: 700C
• Tire width compatibility: 35–50 mm (700x35–50C)
• Valve type: Presta (French)
• Valve stem length: 48 mm
• Colour: black

How to use

Deflate and remove the damaged tube following standard tyre-removal procedures, taking care to protect the tyre bead and rim. Slightly inflate the replacement tube to remove folds, insert it into the tyre, seat the tyre bead onto the rim evenly and then fully inflate to the tyre manufacturer’s recommended pressure. Check the valve seating and trim or secure the valve as necessary for your rim depth, then verify that the tyre is seated correctly around the rim before riding.

What to consider before purchase

• Confirm your tyre width falls within the 35–50 mm range (700x35–50C).
• Check that your wheel requires a Presta (French) valve and whether 48 mm stem length is sufficient for your rim depth.
• Ensure valve length and rim compatibility to avoid needing additional extenders or adapters.

Usage recommendations

Carry this tube as a spare on rides where 700x35–50C tyres are fitted, together with a pump compatible with Presta valves and simple tyre levers. For prolonged off-road use consider pairing with tyre liners or sealant solutions appropriate for your tyre type to reduce the frequency of puncture repairs.