Readers ask: What Pitch Are Bicycle Chain Sprockets?

What is the pitch of a bicycle chain?

The chain in use on modern bicycles has a 1⁄2 inch (12.7 mm) pitch, which is the distance from one pin center to another, ANSI standard #40, where the 4 in “#40” indicates the pitch of the chain in eighths of an inch; and is standard 606 (metric) #8, where the 8 indicates the pitch in sixteenths of an inch.

What is pitch diameter on a sprocket?

The sprocket pitch diameter is an imaginary circle through which the chain pin centers move around the sprocket. The pitch diameter is the fundamental design geometry that determines the size shape and form of the sprocket teeth dimensions.

Will a 40 chain fit a 41 sprocket?

the 40 chain will fit on a 41 sprocket and the 41 chain will fit on a 40 sprocket but only if you shave the edges down a bit because a 40 sprocket is wider.

What is the difference between bicycle chains?

Chains can vary in side plate shape, sizing, and height. Differences can cause variations in shifting performance between brands and models. Additionally, chains will vary in the quality of steel used. Better chains that are more durable and longer lasting tend to have harder rivets.

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What is chain pitch?

Chain size is commonly referred to as Pitch. In actuality, chain size is determined by the chain pitch. Pitch refers to the measurement from one roller-pin center to the next roller pin center of a given chain. ANSI (American National Standard Institute) chain pitch is always measured in 1/8” increments.

Will a #40 chain fit a 35 sprocket?

No. A #40 chain is 1/2″ between the pins and 5/16″ inside width. A #35 is 3/8″ between the pins and 3/16″ inside width. There is no way it will work.

How do I choose a chain sprocket size?

Determine the number of teeth of the small sprocket. The number of teeth for the large sprocket is determined by multiplying the number of teeth for the small sprocket by the speed ratio. More than 15 teeth on the small sprocket is recommended. The number of teeth on the large sprocket should be less than 120.

How do you calculate chain pitch?

The pitch of chain drive components is specified by a 2 digit number. The first digit specifies the center –to- center distance of the chain link pins in 1/8ths of an inch, the second number specifies the chain style. #25 chain means: Chain pitch = 2 x 1/8 or ¼” pitch Chain style = 5 = rollerless chain.

What is the pitch diameter?

PITCH DIAMETER-The basic thread pitch diameter is the diameter where the thread thickness is equal to the space between the threads. If the flats at the top and bottom of the thread are the same, the pitch diameter will coincide with the middle of the sloping side of the thread.

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How do I know my chain size?

Begin by counting the number of teeth on the largest front sprocket and largest rear. These numbers are often printed right on the sprockets and cogs. Next, measure the distance between the middle of the crank bolt to the rear axle. This is also the chain stay length.

Which is bigger 35 or 40 chain?

The main difference between the 35 and the 40 chain is that one is rollerless and the other has rollers. The two chains also have different pitches and diameters, which will limit their interoperability. Additionally, the 40 chain is rated for a significantly higher tensile strength and working load than the 35.

Will 420 chain fit a 428 sprocket?

A 420 and 428 are the same except width and the pins may be a little bigger diameter on the 428. They shouldn’t be though.

Is 40 chain the same as 420 chain?

Active Member. 420 chain is stronger than 41, it has larger pins, the 40 is a little wider, same pin size as 420.

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