Ralson inner tube 700x18/25 (18/25-622/630) FV/48mm

Ralson inner tube 700x18/25 (18/25-622/630) FV/48mm

RALSON inner tube 700 × 18/25 (18/25-622/630) – FV Presta valve 48 mm

RALSON 700 × 18/25 is a bicycle inner tube intended for road and sports bikes with narrow tyres 18–25 mm wide. Thanks to its declared compatibility with rim diameters of 622 and 630 mm, it offers a practical solution for tube replacement on matching bikes.

The tube is fitted with a 48 mm FV (Presta) valve, which is commonly used on road bikes and allows convenient inflation with compatible bicycle pumps.

It is suitable for everyday cycling and sporty rides, and as a spare tube for longer routes.

Size 700 × 18/25 – for narrow road tyres

The tube is intended for tyres 18 to 25 mm wide.

The range 18/25-622/630 stated by the manufacturer covers two rim bead seat diameters:

• 622 mm – the common road bike size designated 700C
• 630 mm – a size used on some older road and touring bikes

The tube can therefore be suitable for several sizes of narrow tyres, provided they fall within the declared range.

Before purchasing, we recommend checking the exact ETRTO designation on the sidewall of the original tyre.

FV Presta valve – length 48 mm

The RALSON tube is fitted with an FV (Presta) valve with a length of 48 mm.

This type of valve is popular mainly on road and sports bikes. Thanks to its smaller diameter, it is also used on rims with a narrower valve hole.

Advantages of the 48 mm FV Presta valve:

• Suitable for road and sports bikes
• Smaller valve diameter than the AV car valve
• Compatibility with pumps and pump heads for Presta valves
• 48 mm length for easier access when inflating on compatible rims
• Easy pressure checking and topping up

Before inflating, the small lock nut at the tip of the valve needs to be loosened. After inflating, gently tighten it again.

Suitable for road and sports cycling

The RALSON 700 × 18/25 tube is intended primarily for bikes with narrow road tyres.

It is used for leisure rides, sporty riding on asphalt roads and regular use of a compatible bike.

Thanks to the 18–25 mm width range, it can serve as a replacement tube for several common widths of road tyres.

A practical replacement tube

The tube is a suitable solution when replacing a damaged or worn original tube.

It can also be used as spare equipment for cycling trips, training or longer road rides.

When fitting, we recommend checking the inner surface of the tyre, the condition of the rim tape and the correct seating of the tube.

For correct function, it is important to observe the recommended inflation pressure according to the values stated on the tyre and rim.

Universal range of use

The advantage of this tube is the combination of an 18–25 mm width range and declared compatibility with rims 622 and 630 mm in diameter.

It is therefore a practical choice for cyclists looking for a replacement tube for narrow road tyres with a Presta valve.

Main features:

• Manufacturer: Ralson
• Product type: bicycle inner tube
• Size: 700 × 18/25
• ETRTO range: 18/25-622/630
• Compatible tyre width: 18–25 mm
• Rim diameter: 622 or 630 mm according to the manufacturers designation
• Valve type: FV – Presta valve
• Valve length: 48 mm
• Purpose: road and sports bikes
• Use: road cycling, leisure rides, sporty riding
• Suitable as: a replacement or spare tube

Main advantages:

• Suitable for narrow road tyres 18–25 mm wide
• Declared compatibility with 622 and 630 mm rims
• Practical FV (Presta) valve
• Valve length 48 mm
• Compatibility with pumps for Presta valves
• Suitable as a replacement tube after a puncture
• Practical as spare equipment for longer rides
• Wide range of use within the stated sizes

Use: The RALSON 700 × 18/25 (18/25-622/630) inner tube with a 48 mm FV Presta valve is a practical choice for road and sports bikes with narrow tyres. Thanks to the declared width range of 18–25 mm and compatibility with rim diameters of 622 and 630 mm, it can be used with various matching sizes. It is suitable for regular cycling and sporty rides, and as a spare tube for longer journeys.