No matter what type the bike you have, the disc brakes are the essential parts in each type of bikes; from the cross country bike until the downhill bike. Mountain bike brakes have its development in the progress, started from the V-Brake in several years ago and the development in the mountain bike industry with the appearance of the disc brakes technology. This is such as great improvisation, that the progress in mountain bike technology has grown very fast and harmonic. Even the mountain bike disc brakes are almost surpass the motorcycle disc brakes, with some technologies like the Ice-Tech from Shimano, and other. But, as good rider, the standard of the disc brakes' size should be noted, and it recommended that certain type of mountain bike cannot use the disc brake for certain disc brake, especially in the size department.
For example, the division of the difference disc brakes' size can be determined by the bike's type; such as the small size of disc brakes usually used for the folding bike, or in some cases used as rear disc brakes in cross country bike. The size of this disc brakes usually at the number 5 inch. The 6 inch disc brakes or rotor in mountain bike is the most large used in the mountain bike, and this size usually used in the cross country type. 7-8 inch rotor size usually used in all mountain bike or downhill bike to get maximum and powerful friction because this type of bike is quite extreme. The division of the rotor size can be like this:
140mm ----- 5 inch
160mm ----- 6 inch
180mm ----- 7 inch
203mm ----- 8 inch (used for the non-XC bike)
224mm ----- 9 inch
This is the common rotor size used in mostly mountain bike types, from cross country to downhill type. Started from here, this is the beginning to know more about the rotor in mountain bike; is there any regulation to compare the frame size with the rotor? The installation of rotor to the mountain bike, and many more.
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