25, 28, 30 or 32 mm tyres: which should you choose?

Updated on 5 November 2026. The recommended products are available at the time of the update.

For many cyclists, 28 mm tyres are a good starting point: they offer a balance of comfort, rolling performance and space requirements. Choose 30 or 32 mm if you want more comfort on uneven tarmac, or 25 mm if your bike requires a narrower tyre, always checking compatibility with your rims and frame.

25, 28, 30 and 32 mm: what really changes

Width affects air volume and the pressure you can use. For the same model, with pressure suited to the load, a wider tyre can absorb uneven surfaces better, but also takes up more space.

• 25 mm: take up less space than wider tyres. They can be a sensible choice for bikes with limited tyre clearance, if approved for the rim; they offer less scope for reducing pressure.
• 28 mm: are a balanced option for training, long rides and tarmac of varying quality. This size also needs to be checked on your bike.
• 30 mm: allow you to seek more comfort on damaged roads while retaining a road setup. They require more space both at the sides and above the tread.
• 32 mm: prioritise air volume and comfort, which are useful on long rides over uneven tarmac. They take up the most space of these four widths.

A 32 mm tyre is not automatically suitable for off-road use: tread, construction and intended use also matter.

Does a narrower tyre roll more easily?

Not necessarily. On uneven tarmac, a wider tyre at the correct pressure can reduce vibrations and jolts, helping the bike roll more smoothly.

On a very smooth surface, the comparison may change. Compound, casing, pressure and whether you use inner tubes or a tubeless setup affect rolling resistance: width alone is not enough to determine which tyre is faster.

• Comfort: 30 and 32 mm generally offer more scope for using lower pressures, within the permitted limits.
• Rolling performance: should be assessed on the actual riding surface and by comparing tyres of similar construction.
• Aerodynamics: depend on the combination of actual tyre width and rim profile. The 25 mm option is not automatically the most efficient.

How to read 700x28c and 28-622

The two designations describe the same nominal size using different systems. To check compatibility, start with the ETRTO designation, such as 28-622.

• 28: indicates the nominal tyre width in millimetres.
• 622: indicates the bead seat diameter, meaning the diameter of the seat where the tyre beads rest in the rim.
• 700x28c: is the traditional designation. The 700 is not the bead seat diameter, and the letter c does not indicate the internal rim width.

The sizes 25-622, 28-622, 30-622 and 32-622 therefore share the same bead seat diameter, but have different nominal widths. This does not mean they can all be used on the same rim or bike.

How to choose

First establish which sizes are permitted on your bike. Then choose from the compatible options according to the roads you ride and the comfort you want.

• Start with your routes: for fairly even tarmac, consider 28 mm; if you often encounter patches and rough surfaces, consider 30 or 32 mm. Keep 25 mm if they suit your use and your bike's components.
• Consider the load: the weight of the rider, bike and luggage affects the pressure required. A greater load can make more air volume useful, without exceeding component limits.
• Check the internal rim width: this is the rim's internal width, not its external width. Find it in the wheel documentation and consult the rim and tyre compatibility charts; if you need to measure it, do so with the tyre removed.
• Check the mounting system: a tube type model requires an inner tube; a tubeless ready model requires compatible components and setup for use without an inner tube. Hookless rims, which have no bead hooks, require explicit approval for that combination and compliance with pressure limits.
• Choose the pressure too: use the manufacturers' guidance as a reference and observe all applicable limits. Inflating to the maximum does not guarantee greater speed; going too low increases the risk of rim strikes and, with inner tubes, pinch punctures.

If you are also considering a new bike, our guide to choosing a road bike helps you understand intended use and geometry.

Actual width and frame clearance: how to check them

A tyre marked 28 mm on the sidewall may measure differently once fitted. Internal rim width, model and pressure affect the actual width: a wider rim tends to make the tyre wider, but there is no universal correction.

• Read your bike's limits: check the maximum tyre width permitted for the frame and fork, and any conditions specified by the manufacturer.
• Measure the fitted tyre: once it has seated correctly and is at riding pressure, use callipers at the widest point without compressing the sidewalls. Repeat the check on both wheels.
• Check clearance everywhere: look at the space between the tyre and the fork, rear stays, bridges and any rim brake callipers. Also check the clearance above the tread.
• Allow the required clearance: the tyre must have the clearance specified by the manufacturer, allowing for flex, small debris and any mudguards. Simply spinning without touching when the bike is stationary is not enough.

For example, when moving from an actual width of 28 to 32 mm, the tyre extends approximately 2 mm further on each side if the wheel remains centred. The height may also change: this calculation provides guidance, but does not replace a fitting check.

Our recommendations, available now

These options cover different needs, from inner tubes to tubeless. Before buying, check your chosen variant and its compatibility with your bike.

Continental Grand Prix 5000 25-622 700x25c Black/Transparent Folding Tyre

An option for riders looking for a 25 mm road tyre for use with an inner tube. It is foldable and features BlackChili compound and Vectran Breaker protection.

Continental Grand Prix 5000 Folding Tyre 28-622 700x28 Black

Designed for rides and training on tarmac, for riders choosing 28 mm tyres with inner tubes. It has BlackChili compound, Vectran protection and a three-layer 330 TPI casing; it is not tubeless.

Continental Grand Prix 5000 30-622 (700x30c) Tyre Black

Suitable for training and long road rides, with a nominal width of 30 mm. This folding tube-type model has Black Chili compound, Vectran Breaker and a claimed weight of 260 grams.

Pirelli P7 Sport Tyre

Designed for training and everyday rides on 700c road bikes. Available widths include 28c and 32c; it features PROCompound compound, a 60 TPI nylon casing and TechBELT Road protection.

Vittoria Corsa N.EXT G2.0 Tubeless Ready Tyre

An option for racing and fast road rides, also available in 28, 30 and 32 mm. It has a 100 TPI nylon casing and 2C Graphene 2.0 compound; hookless rim compatibility is specified for sizes from 28c upwards, always subject to the fitting requirements.

Goodyear Eagle F1 Tubeless Complete Tyre

Suitable for riders looking for a road tyre for use without an inner tube who want to choose from all four widths: 25, 28, 30 and 32 mm. It incorporates Dynamic:GSR compound and Armour Tubeless Liner protection against cuts and punctures from bead to bead.

You can compare other options in the Road Bike Tyres collection. For shipping information, see the shipping policy.

We help you choose in Casapulla

Evolution Bikes is a family-run shop in Casapulla, in the province of Caserta, established in 1974 and now in its third generation, with a workshop, bike fitting and e-bike servicing. Bring your bike into the shop to check clearances and have the tyre pressure adjusted, or ask us for advice, specifying your bike model, wheels and current tyres.

Frequently asked questions

Are 25 or 28 mm tyres better for a road bike?

28 mm tyres are a good starting point for riders seeking a balance between comfort and rolling efficiency. 25 mm tyres take up less space, but your choice must be compatible with the rim, frame and fork.

Are 32 mm tyres slower than 28 mm tyres?

Not necessarily: on uneven tarmac, they can reduce vibration and jolts when correctly inflated. Speed also depends on the casing, compound, pressure and aerodynamic pairing with the rim.

Can I fit 30 or 32 mm tyres instead of 25 mm tyres?

Only if the rim, frame, fork and any rim brakes can accommodate them. Check the actual width after fitting and the remaining clearance, observing the margins required by the manufacturers.

Why does a 28 mm tyre measure more than 28 mm?

The size on the sidewall is nominal: the rim's internal width, tyre construction and pressure affect the actual width. Measure it with callipers once the tyre is fitted, seated and inflated to its riding pressure.