An excellent value pack of high quality inner 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 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, were all riding the same tubes. This is great for you because youll be getting a high quality tube at a super reduced price. Features: Fits 700c road tyre sizes from widths 18-25mm Valve: 48mm presta, threaded Weight: Approx 130g (ea) Stringent quality control inspection Made using high quality butyl rubber Suitable for road bikes Price is for 8 inner tubes Fits all following tyre sizes: 700 x 18mm (18-622) 700 x 20mm (20-622) 700 x 22mm (22-622) 700 x 23mm (23-622) 700 x 25mm (25-622)