Choice Blue ZRACE Chain Line Measurement Tool, 3D Printing, Bicycle Bike Chainline Tool, Offset Measurement

Note: This product is made of PAL material
3D printing. PAL material is corn extract and is 100% environmentally friendly
and biodegradable, but it is afraid of water and light. Please avoid soaking in
water and long-term exposure to sunlight.

Brand: ZRACE

Material: PAL

Process: 3D printing

Application: Measuring chain line

Weight: 8g

The word "chainline" refers to
how straight the chain runs between the front and rear sprockets. Ideally, both
sprockets should be in the same plane, so that there is no sideward motion or
stress to the chain. This constitutes "perfect chainline".

In the case of derailer geared bicycles,
the chainline is not perfect in most gears. Chainline mismatch can cause the
chain to rub against the side of an outer, larger chainring when engaged with a
smaller one, and can cause problems with shifting, especially with the front
derailer. The worse the chainline, the worse the mechanical efficiency of the
drive train。

Symptoms of poor chain line:

*Premature wear to chains, chainrings and
cassettes

*Grinding, rough or noisy pedalling

*Dropped chains

*Chains that derail when you backpedal
while in the largest cassette cog

How to adjust the chain line:

After measuring the accurate data of the chain line, you can adjust it by adding or

subtracting crankshaft axle spacers or replacing spiders with different offsets according

to the situation of the crankset.

Chainline measurement method:

1x

2x / 3x