Bike Wheels, Tyres and Inner Tubes

Bike Wheels, Tyres and Inner Tubes FAQs

How do I choose the right inner tube for my bike?

Choosing the right inner tube comes down to three numbers printed on the sidewall of your existing tyre: the wheel diameter, the tyre width range, and the valve type your bike uses. Match all three to the box label of the replacement tube, and the fit will be correct across mountain, road, hybrid, kids, and folding builds. The two main valve types matter most: Presta valves are slimmer and sit on most road bikes and modern mountain bikes, while Schrader valves are the wider, car-style design found on hybrid, kids, and many entry-level bikes. The reason valve fit matters is the rim hole: a slim Presta in a wide Schrader hole leaks and wobbles, while a Schrader in a Presta-drilled rim will not seat at all. Practical advice: keep one spare tube and a patch kit per bike in the saddle bag. Browse our range of bike inner tubes across the Btwin and Decathlon labels.

What bike tyres should I choose for my style of riding?

The right bike tyres depend almost entirely on the surface you ride and the speed you ride at across that surface. Slick road tyres deliver low rolling resistance and maximum speed on tarmac, which suits commuters, road cyclists, and fitness riders covering long distances on smooth roads. Knobbly mountain bike tyres bite into loose soil, gravel, and forest trails for off-road grip, while hybrid tyres split the difference with a smooth centre strip and grippy side knobs for mixed urban and light-trail use. Puncture-protected city tyres add a reinforced belt for daily commuting. Browse our range of bike tyres in road, mountain, hybrid, and folding sizes across the Btwin, Hutchinson, and Michelin labels.

When should I replace a complete bike wheel rather than just the tyre?

You should replace a complete bike wheel rather than just the tyre when the rim itself is cracked, deeply gouged, badly buckled, or worn through the braking surface from years of rim-brake use. The reason matters for safety: a damaged rim can fail catastrophically under load, even if a fresh tyre and tube look perfectly fine from the outside. Bearing play in the hub, broken or missing spokes and persistent buckles that reappear after every truing also signal the wheel itself has reached the end of its useful life. Browse our range of bike wheels in road, mountain, hybrid, and folding diameters across the Btwin and Mavic labels.

What role do axles and skewers play in fitting a bike wheel?

Axles and skewers hold the wheel firmly inside the frame and fork dropouts, and they vary depending on the style and age of your bike. Quick-release skewers slot through a hollow axle and clamp closed with a lever for tool-free wheel removal on most road, hybrid, and kids bikes. Through-axles, by contrast, thread directly into the dropout and use a wider, stiffer design that better suits disc-brake mountain and gravel bikes. The reason it matters is alignment: a mismatched axle prevents the wheel from sitting square in the frame and can rub the brake. Browse our range of bike wheel axles in quick-release and through-axle formats.

How do bike wheels, tyres, and inner tubes fit into a wider spare parts setup?

Bike wheels, tyres, and inner tubes form the rolling foundation of any bike, but they sit inside a much wider spare parts setup that keeps the whole bike running smoothly across the season. Brake pads, chains, cassettes, derailleurs, cables, and bottom brackets all wear at different rates depending on mileage and weather, and a well-stocked home toolbox saves a trip to the workshop for the simpler swaps. The reason this matters is downtime: a fresh tyre fitted to a stretched chain only delays the next issue. Browse our range of bike spare parts covering brakes, drivetrain, cables, and frame parts across Btwin and Shimano.