Park Chain Wear Indicator

This is a must-have for all riders. It is has been spot-on with my LBS' chain-wear indicators.

Pros
cheap and easy to use.

Cons
none that I have found.

Pros
Inexpensive, easy to use, and practical. A must-have tool in the box.

Very handy and convenient tool. Every biker should own one.

Pros
Works great, easy to use.

Cons
None

A tool that every biker should have.

Pros
Sturdy and accurate

Cons
None

Worth having if you ride more than once a week. Replacing your chain on time can lengthen the life of your drive train significantly. It will also save you the frustration of poor shifting.

Pros
Much more accurate than the analog dial one.

Cons
None

This tool is a must if you plan to do a lot of riding and want a healthy drivetrain. A worn out chain can break or strip the teeth on your cogs leaving you stranded on the trail.

Pros
Solid construction, easy to use, easy to clean, does exactly what it is designed to do.

Cons
NONE !

Pros
does its job

Super easy to use.

Pros
Very easy to use.

Cons
None

Very simple.......... I mean VERY simple to use. If it fits, time to switch out your chain.

Pros
Simple, even a monkey could do it.

Cons
None

Just slip in and check. It is just that simple.

Pros
Works Great
Quick and easy to use
Indestructible

Cons
none

Use it for chain replacement or you will be stranded.

Pros
Works great, good price, accurate.

Cons
None

If you work on your bike one tool you need to have

Pros
Simple and easy to use

Cons
none

Cheap enough that every home mechanic should have one.

Pros
Simplicity at its best. No springs and no way to read it wrong. If it fits it needs replacing. No questions asked.