What is 700c wheel size - Falcarbon Bike

The 700C wheel size is one of the most widely used standards in the cycling industry, commonly seen in road bikes, hybrid bikes, and even some off-road models. Whether prioritizing speed, comfort, or stability, this wheel size delivers excellent performance.

This article will provide a detailed analysis of the characteristics of 700C wheel size, covering aspects such as size standards, applications, and compatibility.

What is the 700C Bicycle Wheel Size

700C is an internationally standardized bicycle wheel size developed in France and expressed using the metric system. The “700” refers to an approximate original outer diameter of 700 millimeters for the wheel. Still, the actual diameter of modern 700C tires varies slightly depending on the tire width, typically ranging from 680 to 710 millimeters. “C” is a width designation from an older classification system, similar to 650B or 700A labels.

According to the International Organization for Standardization (ISO), the bead seat diameter (BSD) of a 700C wheel is 622 millimeters. This measurement forms the foundation of modern bicycle design and is widely used in road bikes, hybrid bikes, and some touring bikes.

Understanding 700C Wheel Size

To accurately measure the size of a 700C wheel, consider the following key parameters:

Bead Seat Diameter (BSD): This is 622mm, the core measurement for fitting tires onto the wheel.
Outer Diameter: This depends on the tire width and thickness, typically ranging from 680mm to 710mm.
Tire Width: Road bike tires typically range from 23mm to 32mm, while for off-road or mixed-use bikes, widths can go up to 40mm or even wider.

These measurements make it clear why 700C wheels are compatible with various bike types and riding scenarios. Additionally, you can refer to our previous article, Bicycle Wheel Size Chart, which lists different wheel sizes and their application ranges, including 26-inch Wheel, 27.5-inch Wheel, 27-inch Wheel, and more, making it easier to choose the right one.

Are 700C wheel Sizes the same as 29-inch wheels?

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While 700C and 29-inch wheels may appear similar in many ways, they are not the same, even though they share the same bead seat diameter of 622mm. The key differences primarily lie in the tire design and application range.

In terms of size, the bead seat diameter of 700C and 29-inch wheels are indeed the same, meaning they can use the same rim and spokes. This makes them interchangeable in this aspect, as both wheel systems can theoretically use rims with the same inner diameter. However, the issue lies in the fact that 29-inch tires are much wider in design than 700C tires, so despite having the same rim diameter, 29-inch tires typically cannot be mounted on the narrow rims designed for 700C tires.

700C wheel sizes are typically equipped with narrower tires, usually ranging from 23mm to 28mm, designed for road bikes that emphasize speed, low rolling resistance, and better handling. This design is ideal for smooth pavement riding, especially on highways or long-distance rides. On the other hand, 29-inch tires are commonly used for mountain bikes, with widths reaching 2.0 inches or more, designed to handle rough terrain and provide better grip and comfort. These wider tires make 29-inch wheels more suitable for off-road cycling, effectively handling obstacles and reducing shock during rides.

Although the bead seat diameter is the same, the width of 29-inch tires is typically much larger than that of 700C wheel sizes, preventing them from fitting on the narrow rims designed for road bikes. Additionally, the tire width directly affects comfort, handling, and stability. 29-inch tires offer better shock absorption, especially for off-road riding and rugged terrain, but the increased rolling resistance and lower speed performance make them unsuitable for road bikes.

For more details, check out How to Measure Bike Wheel Size. The compatibility between tires and rims is crucial for safety. When selecting tire width, ensure it falls within the recommended range for the rim width to avoid issues like flats or instability while riding.

Road Bike Rim Diameter

700C wheel sizes are very common in road bicycles, with a rim diameter (bead seat diameter) of 622mm, which is the size standardized by the International Organization for Standardization (ISO). While 700C is a general term, the tire width can vary depending on the type of road bike and its intended use, leading to different rim widths as well.

Modern road bike rims are typically designed for lightweight construction and high strength, supporting narrower tires, such as 23 to 32mm wide. This design minimizes rolling resistance, making it ideal for high-speed and long-distance rides. Additionally, many high-end road bike rims feature a tubeless design, which not only improves puncture resistance but also enhances ride comfort.

In recent years, with the diversification of cycling needs, road bike rims have increasingly adapted to wider tires. For example, gravel bikes and endurance bikes commonly use wider tires (35mm or more) to improve comfort and stability. These bikes feature rims that are slightly wider than those of traditional racing road bikes to ensure compatibility while securely holding the tires in place.

In terms of materials, aluminum alloy, and carbon fiber are the primary choices for road bike rims. Aluminum rims are relatively affordable and suitable for beginner cyclists, while carbon fiber rims, known for their lighter weight and higher stiffness, are standard on high-end models. Carbon fiber rims are often combined with aerodynamic designs, with cross-sectional shapes (such as U-shaped or V-shaped) that optimize wind resistance performance during high-speed riding.

What Types of Bikes Use 700C Wheel Sizes?

1. Road Bikes

700C wheel sizes are widely used on road bikes. Road bikes typically pair with narrow tires, ranging from 23 to 32mm, which are ideal for smooth, paved roads. The larger diameter design helps reduce rolling resistance, assisting riders in maintaining speed during long-distance rides. The geometry of road bikes is designed to complement 700C wheels, offering both stability and easy control.

2. Hybrid Bikes

Hybrid bikes also commonly use 700C wheel sizes. Compared to road bikes, hybrid bikes have wider tires, typically ranging from 35 to 40mm, which enhances comfort and allows for both urban commuting and occasional light off-road riding. The versatility of 700C tires enables hybrid bikes to perform well on a variety of terrains.

3. Touring Bikes

Touring bikes often use 700C wheel sizes, equipped with wider tires to handle higher load capacities. Tires ranging from 32 to 45mm are commonly found on these bikes, providing a stable riding experience on both paved roads and gravel paths. Since touring bikes are often used for long-distance cycling, the widespread use of the 700C wheel sizes also ensures that spare parts and accessories are easy to find while traveling, adding to the convenience.

FAQ

What is the difference between 700C and 650B wheels?

The bead seat diameter (BSD) of a 700C wheel is 622mm, while the BSD of a 650B wheel is 584mm. 700C wheel sizes are more suited for speed and efficiency, typically used in road cycling and long-distance touring. 650B wheels, on the other hand, are wider and more comfortable, making them ideal for off-road or rugged terrain.

Why is the rim diameter of a road bike 622mm but called 700C?

The term “700C” originates from an old French tire classification system, where early tire designs, including the tire width, were close to 700mm in diameter. However, modern tire widths and designs have changed, and while the name is still used, the actual diameter is typically less than 700mm.

Are the rim and wheel the same thing?

No, the rim and wheel are not the same. The rim is just one part of the wheel. It is the outer metal or carbon fiber component that holds the tire. The wheel, on the other hand, includes the rim, spokes, hub, and typically the tire. The rim has a specific diameter, such as the 622mm diameter of a 700C wheel, but the wheel as a whole is a complete structure that rolls and supports the bike’s weight.

Why is the letter “C” used in 700C wheels?

The “C” comes from the early French tire classification system, where it represented a category of tire width. In the 700 series, A, B, C, and D represent different widths, with “C” indicating a medium-width tire. Although modern tire designs have changed, this naming convention persists and has become synonymous with the 622mm bead seat diameter.

What tire widths can 700C wheels accommodate?

700C wheels can accommodate a variety of tire widths, ranging from the common 23mm tires used in road bikes to wider tires used in gravel or touring bikes, which can be 45mm or even wider, depending on the frame and rim design compatibility.

Can 700C tires be mounted on rims of other sizes?

No, 700C tires need to match the bead seat diameter of the rim, which is 622mm. They are not compatible with rims of other sizes, such as 650B or 26-inch rims.