Bicycle Wheel Sizes Guide

Choosing the right wheel size for your bike is crucial for ensuring comfort, safety, and the best riding experience possible. The wheel size of a bicycle can significantly affect how it performs on different terrains, how easily it manoeuvres, and how comfortable it feels to ride. Below, we provide detailed tables for various bike types, covering wheel sizes, corresponding ISO codes, tyre thickness, and the specific uses of each type. This guide is designed to help you make informed decisions when selecting the perfect bike for you or your family.

Kids Bikes

Wheel Size (inches) ISO Code Tyre Thickness Uses
12″ ISO 203 mm 1.75″ – 2.4″ Learning to ride, park paths, light trails
16″ ISO 305 mm 1.75″ – 2.4″ Learning to ride, park paths, light trails
20″ ISO 406 mm 1.75″ – 2.4″ Learning to ride, park paths, light trails
24″ ISO 507 mm 1.75″ – 2.4″ Learning to ride, park paths, light trails

Folding Bikes

Wheel Size (inches) ISO Code Tyre Thickness Uses
16″ ISO 305 mm 1.25″ – 2.0″ Urban commuting, easy storage, portability
20″ ISO 406 mm 1.25″ – 2.0″ Urban commuting, easy storage, portability

Gravel Bikes

Wheel Size (inches) ISO Code Tyre Thickness Uses
27.5″ ISO 584 mm 1.75″ – 2.2″ Mixed terrain, off-road trails, long-distance riding
29″ ISO 622 mm 1.75″ – 2.2″ Mixed terrain, off-road trails, long-distance riding

Hybrid Bikes

Wheel Size (inches) ISO Code Tyre Thickness Uses
26″ ISO 559 mm 1.5″ – 2.0″ City streets, bike paths, moderate trails
28″ ISO 635 mm 1.5″ – 2.0″ City streets, bike paths, moderate trails

Road Bikes

Wheel Size (inches) ISO Code Tyre Thickness Uses
700c ISO 622 mm 0.9″ – 1.25″ Paved roads, racing, fitness riding

Mountain Bikes

Wheel Size (inches) ISO Code Tyre Thickness Uses
26″ ISO 559 mm 2.0″ – 3.0″ Off-road trails, technical terrain, downhill
29″ ISO 622 mm 2.0″ – 3.0″ Off-road trails, technical terrain, downhill

Oversized Fat Bikes

Wheel Size (inches) ISO Code Tyre Thickness Uses
26″ ISO 559 mm 3.8″ – 5.0″ Snow, sand, loose terrain
27.5″ ISO 584 mm 3.8″ – 5.0″ Snow, sand, loose terrain

Frequently Asked Questions:

What is the difference between different wheel sizes?

Different wheel sizes affect the bike’s handling, speed, and comfort. Smaller wheels are typically used on kids and folding bikes for better manoeuvrability, while larger wheels are more efficient on road and gravel bikes for speed and stability.

How do I choose the right wheel size for my bike?

Choosing the right wheel size depends on your intended use, your height, and the type of bike you want. For kids, the correct wheel size is usually based on age and height. For adults, different bike styles, such as road, mountain, or hybrid, have optimal wheel sizes for specific purposes.

What does the ISO code mean?

The ISO code refers to the standardized measurement of the diameter of the wheel and tyre. This helps to ensure compatibility between tyres and rims. It is important to match the ISO code when replacing wheels or tyres.

What tyre thickness should I choose?

The appropriate tyre thickness depends on the terrain you will be riding. Thicker tyres provide more stability and cushioning, making them ideal for off-road or rough terrain, while thinner tyres are lighter and offer less resistance, making them suitable for road cycling.

Are bigger wheels faster?

Bigger wheels generally roll more smoothly over obstacles and maintain speed better, making them faster on smoother surfaces. However, they may not be as agile as smaller wheels, which can be beneficial for technical trails and tight turns.