Bicycle Chain Line Explained

A bicycle is said to have perfect chainline if the chain is parallel to the centerline of the frame which means that the rear sprocket is directly behind the front chainring.

Bicycle chain line explained. Step 1 chainline explained. Middle of the front chainring and middle of the rear sprocket should be at the same distance from the axis that goes along the middle of the bicycle frame from the front to the back. Bicycle chain comes in four basic widths. An 11 speed cassette requires a different chain to a 9 speed one the chain must be thinner in order to fit into the narrower spaces between the sprockets.

A bicycle chain is a roller chain that transfers power from the pedals to the drive wheel of a bicycle thus propelling it. In its most basic definition chainline is the line of the chain. Chainline is the angle of a bicycle chain relative to the centerline of the bicycle frame. This video will take you step by step through sizing a bike chain including determining whe.

A number of different chain widths are available to suit specific bike types such as bmx or to fit different road and mtb drivetrains e g. Replacement chains for bicycles are always longer than you need. The front chain rings should be about the same distance from the center line. The rear cog middle is effectively 43 1mm from the bike center line.

It is marked in the picture 2. The width is nominally the width where the sprocket teeth fit in. The pitch is the distance between rollers 1 2 on all modern bicycle chain. 130 6 2 35 4 2 4 5 43 1mm.

For this post it suffices to say that bicycle chain pitch is exactly 1 2 inch 12 7 mm. For a single speed bike you simply want the chain as straight as. Most bicycle chains are made from plain carbon or alloy steel but some are nickel plated to prevent rust or simply for aesthetics. The cogset middle is then.

The worse the chainline the worse the mechanical efficiency of the drive train though research has shown the loss to be minor at least with modern flexible chains. This goes for all the bicycle chains regardless of the speed number. Chainline also refers to the distance between a sprocket and the centerline of the frame. Chain size is specified by pitch and width.

The bike center line is in the middle of the hub so the center line is a 65 3mm from each locknut. Inner chain width is the spacing between a pair of inner plates. Chain drives are among the most efficient means of power transmission known. Obsolete chain designs previously used on.

It is explained in plain english in this post. Distance between the middle of chainring s set s and the longitudal axis of the bicycle.