What does 700x40c mean on a tire?
Bike tire dimensions: What does 700x40c mean? Tire dimensions are described using two numbers— for example 700 x 40c. The first number refers to the diameter and the second number is the tire width. On a 700x40c tire, the first number indicates that the outside diameter is approximately 700 millimeters. Example: 700 x 40C. The French long designation consists of two numbers and one letter. The first number, 700 , means that the tire has an outer diameter of 700 mm (i. The second number, 40 , indicates that the tire is approximately 40 mm (i.This size is commonly used on road, gravel, and hybrid bikes, providing a balance of speed, efficiency, and comfort. The “700c” designation originates from the French sizing system, where “700” referred to the tire’s outer diameter, and “c” indicated the width category.Most gravel bikes come equipped with either 700C or 650B wheels so choose the tire size that matches your wheels. If you have the option to switch up wheel sizes, our general advice is to choose 700C for speed, efficiency, and versatility or 650B for comfort, grip, and durability.On thoroughbred gravel race bikes, an average tire width of 38 mm turned out to be optimal. The tires found on off-road gravel bikes, on the other hand, are significantly wider, often going up to 50 mm. Wide tires allow you to run lower pressures and are more comfortable than narrower tires.
What is the PSI for 700x40c tires?
Most professional riders pick a tire pressure based on the quality of the roads/terrain for this reason and will usually run tire pressures between 70-100 psi depending on the conditions (rougher roads, lower pressure) with a slightly higher pressure in the rear tire.If your tire is more than 25% under the recommended standard (usually 30 to 40 psi), you’re at risk for a sidewall blowout. However, in one study, 34% of men and 50% of women said they rarely check their tire pressure. Tire-related crashes are a particular risk for teenagers.Suggested Pressures by Cycle Type Road cycles: Typically run between 80–130 PSI, ideal for smooth surfaces and high-speed riding. Mountain cycles: For off-road and trail use, go with 25–30 PSI. If using the same cycle for urban commuting, slightly higher pressure around 40–50 PSI works better.
What is the MM of a 40c tire?
The tire is labelled 40c but when measured it’s actually 36mm. Internal rim width can play a factor also. The Rule of 105 states that the rim must be at least 105% the width of the tire if you have any chance of re-capturing airflow from the tire and controlling it or smoothing it. One of the most interesting aspects of the Rule of 105 is that before 2001, nobody was tunnel testing with 21 or 23mm tires.It has often been said that to have good cycling wheel performance, there is a rule that the external rim width of a wheel should be at least 105% of the width of the tyre, or that there is a simple relationship/formula that will predict the aerodynamic performance of a wheel based on rim width vs tyre width.
What does C mean in tire size?
The C-Type tire, on the other hand, is specifically meant as a commercial-rated tire, with a higher load rating for a given size than many LT tires. These C-Type tires will show the letter “C” immediately after the wheel diameter in the tire code. Both 29 mtb tires and 700c tires have a bead seat diameter of 622mm, so they are effectively the same. Basically road bikes use 700c nomenclature and mountain bikes use the 29 designation. As some else said, usually 700c rims are narrower, like 13-17mm inner widths to fit 21-28mm slick high pressure tires.The term “700c” is the tire size according to the French system. The “700” is stating the diameter of the bicycle tire and “c” is the width size of the tire. However it’s not 700 millimeters it’s 633 millimeters. Also, another common mistake is that often riders confuse “c” with centimeters.
What does the C stand for in 700c wheels?
The term “700c” is the tire size according to the French system. The “700” is stating the diameter of the bicycle tire and “c” is the width size of the tire. However it’s not 700 millimeters it’s 633 millimeters. Also, another common mistake is that often riders confuse “c” with centimeters. C means that the maximum outside diameter of the wheelset is 700mm, which is about 700÷25.While 700cc refers to the engine displacement in motorcycles, 700c is all about bicycle tires. Specifically, in the old French sizing system, the 700 stands for the tire’s diameter, and the c indicates the width. But here’s the kicker: the diameter isn’t 700 millimeters; it’s actually 633 millimeters.