Positz Fly Weight Road Bike Inner Tubes 700 x 18-25c Presta Valve 48mm (Box of 4)


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Positz Fly Weight Road Bike Inner Tubes: An excellent value pack of high quality road bike tubes to fit 700c road bike rims with 18c to 25c wide tyres. These essential inner tubes are made of the highest quality butyl rubber and tested extensively to ensure reliability. Ideal for most road bikes, every cyclist knows they will need spare tubes ready to go! This handy value pack means you have a few spares, and will ensure you won’t be caught without. Quality and reliability – that’s the Positz motto!

These lightweight Positz tubes are made from one of the biggest tube factories in the world, responsible for many of the big brands including Michelin. This essentially means that no matter the tube brand, we’re all riding the same inner tubes! This is great for you because you’ll be getting a high quality tube at a super reduced price.

Positz tubes are compatible and therefore may be used in conjunction with any of the following brand name clincher tyres: Continental, Vittoria, Schwalbe, Maxxis, Kenda, Michelin, Hutchinson, IRC Tire, Mavic and many many more.

Extra light weight all-round tubes, these are suitable for club racers and other cyclists who enjoy their road riding at a more serious level.


  • Fits 700c road tyre sizes from widths 18-25mm
  • Valve: 48mm presta, threaded
  • Lightweight: Only approx 80-99g (ea)
  • Stringent quality control inspection
  • Made using high quality butyl rubber
  • Suitable for road bikes
  • Pack of 4 road bike tubes

Compatible Tyre Sizes:

  • 700c x 18mm (18-622)
  • 700c x 20mm (20-622)
  • 700c x 22mm (22-622)
  • 700c x 23mm (23-622)
  • 700c x 25mm (25-622)

Presta Valves

Presta valves are a popular choice among cyclists for several reasons. Firstly, their slender design makes them lightweight and ideal for high-performance bicycles, minimizing rotational weight for enhanced speed and agility. Additionally, their construction allows for higher tyre pressures, crucial for road cyclists and other performance cyclists seeking optimal rolling efficiency.

Presta Valve Bicycle Tubes

Frequently asked questions (presta valve tubes)

No, and most people will not use sealant in these tubes.

Unlike tyres, inner tubes are quite flexible and therefore can fit a range of tyre sizes.

The correct size tubes fit to your tyres. Please double check the product description for sizing information.

You really want to avoid using the wrong size tube where possible. In an emergency situation it might get you home, but there's a high risk of flatting in the process.

Yes, most people will carry one or two spare inner tubes when riding. In the event of a puncture, a replacement tube can be relatively easily swapped out so that you can keep riding.


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Lubrication, Cleaning and Service

Zefal Pro 2 Grease – 150ml Tube