What are the sizes of different types of bicycle dental discs?

The dimensions of bicycle dental disc include crank length, disc specifications and BCD value (the diameter of the center of the screw circle), etc. Different types of bicycle dental discs have different choices in these dimensions. The following is a detailed introduction:

Road bicycle tooth plate

Crank length: common ones are 160mm, 165mm, 170mm, 172.5mm and 175mm, among which 170mm is more commonly used.

Disc specifications: There are usually two-disc combinations, such as 50/34T, 52/36T and 54/40T, and some single-disc specifications.

BCD value: mostly 110BCD and 130BCD, and 130BCD is common in road vehicles that require high speed and efficiency.

Mountain bike tooth plate

Crank length: generally 165mm, 170mm, 175mm, etc. Some short-stroke mountain bikes may use shorter cranks, such as 160mm.

Disc specifications: Single disc system is common, and the number of disc teeth is 28T, 30T, 32T, 34T and 36T. There are also two-disk or three-disk systems, with two disks such as 36/22T and three disks such as 44/32/22T.

BCD value: 104BCD is common, and 144BCD may be used for some three-disc dental discs.

Folding bicycle tooth plate

Crank length: Similar to road bikes and mountain bikes, the common ones are 165mm, and there are also some short cranks with special design, such as 152 mm.

Disc specifications: According to different folding vehicle models and uses, the number of disc teeth can range from 36T to 52T, and the common ones are 46T, 48T and 52T.

BCD value: mostly 110BCD and 130BCD, and some square-hole dentures adopt other sizes.

** gravel bicycle tooth plate * *

Crank length: generally 165mm, 170mm, 172.5mm, etc.

Disc specifications: usually single disc design, the common disc specifications are 40T, 42T, 44T and so on.